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Well or reservoir

Subclass of:

703 - Data processing: structural design, modeling, simulation, and emulation

703006000 - SIMULATING NONELECTRICAL DEVICE OR SYSTEM

703009000 - Fluid

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DocumentTitleDate
20130030782N-PHASIC FINITE ELEMENT METHOD FOR CALCULATING A FULLY COUPLED RESPONSE OF MULTIPHASE COMPOSITIONAL FLUID FLOW AND A SYSTEM FOR UNCERTAINTY ESTIMATION OF THE CALCULATED RESERVOIR RESPONSE - In an exemplary embodiment, a method is disclosed for developing an N-phasic finite element model for performing fully coupled analyses of multi-phase compositional fluid flow and heat flow in nonlinearly deforming porous solid media with time-dependent failure. The method can include formulating a finite element model of the behavior of a coupled solid-fluid formation, having complex geometry and behavior, and applying the model to derive the response of the formation in the form of one or more displacement fields for the solid phases and one or more pressure fields for the fluid phases in a zone of interest in a formation. In an exemplary embodiment, a system is disclosed for estimating the uncertainties in the derived displacement and pressure field solutions for the response of the fully coupled solid-fluid phases.01-31-2013
20100161300System and method for forecasting production from a hydrocarbon reservoir - A system and method is taught to substantially automate forecasting for a hydrocarbon producing reservoir through integration of modeling module workflows. A control management module automatically generates static and dynamic offspring models, with static and dynamic modeling software, until a performance objective associated with the forecasting of the reservoir is satisfied. The performance objective can include an experimental design table to determine a sensitivity of a particular parameter or can be directed towards reservoir optimization, i.e., ultimate hydrocarbon recovery, net present value, reservoir percentage yield, reservoir fluid flow rate, or history matching error.06-24-2010
20110184711METHOD FOR ESTIMATING FORMATION PERMEABILITY USING TIME LAPSE MEASUREMENTS - A method for determining permeability of a subsurface formation includes measuring a parameter related to fluid content of the formation at a first time from within a wellbore penetrating the formation. A rate of entry of fluid from the wellbore into the formation is determined from the measurement of the parameter made at the first time. The permeability is determined from the rate of entry.07-28-2011
20130211807Method and System for Fracturing a Formation - Systems and methods for fracturing a formation are provided. A method includes generating a subsurface model including the production formation and a zone proximate to the production formation. A number of scenarios are simulated in which a volumetric change is created in the zone proximate to the production formation. A scenario is selected from the plurality of scenarios to stimulate the production formation. The scenario is performed to create a fracture field in the production formation.08-15-2013
20100076740SYSTEM AND METHOD FOR WELL TEST DESIGN AND INTERPRETATION - A method and system for well test design and interpretation, comprising a testing manager system, which includes at least one of testing hardware and gauge metrology; a geological model coupled to the testing manager system; a dynamic and static engineering data acquisition system coupled to the geological model; and a reservoir modeling system coupled to the dynamic and static engineering data acquisition system to generate a reservoir model. Also provided is a method and computer program for controlling, driving, and enabling the devices, systems, and subsystems presented herein through interaction with a human user, or the like.03-25-2010
20120245911Simulating dynamic reservoir behaviour - A method for simulating and displaying dynamic reservoir behavior.09-27-2012
20100114544Three Dimensional Well Block Radius Determiner Machine And Related Computer Implemented Methods And Program Products - Three dimensional well block radius determiner machines, systems, program products, and computer implemented methods are provided to determine a three dimensional equivalent well block radius of a perforated grid block cell, with three dimensional flow, of a three dimensional coordinate grid block constructed over a three dimensional simulated well formation in a finite difference petroleum reservoir simulator. Various embodiments of the invention, for example, can beneficially account for both horizontal and vertical flow of oil through a well perforation without the need for complicated, expensive, and time-consuming numerical or iterative solutions. Embodiments of the present invention, for example, can be used as a part of legacy simulators thereby providing more accurate well block radius calculations, by accounting for both horizontal and vertical perforation flow, without introducing significant implementation hurdles, development costs, or simulation runtime delays.05-06-2010
20130080133CORE-PLUG TO GIGA-CELLS LITHOLOGICAL MODELING - Well core data descriptions are received as input digital data for computer lithofacies modeling. Digital templates are established for carbonate and clastic core description based on reservoir rock formation analysis. Description criteria of the template for carbonate rock can include texture, mineral composition, grain size, and pore type. For clastic rock, the criteria in the template can include grain size, sedimentary structure, lithology, and visual porosity. The data and observations regarding these criteria are entered into a computer 3D geological modeling system directly. Wireline log data are integrated to calibrate with well core description to derive lithofacies. The lithofacies are exported in digital format to be entered into the 3D geological modeling system. A geologically realistic model of the reservoir can be established.03-28-2013
20130035920METHODS FOR PERFORMING A FULLY AUTOMATED WORKFLOW FOR WELL PERFORMANCE MODEL CREATION AND CALIBRATION - Methods for creating and calibrating production and injection well models for a reservoir, are provided. An example of a method for creating and calibrating well models can include performing a comprehensive retrieval or gathering of required data components, feeding the gathered data into well performance software to thereby develop a model of the well, performing an initial calibration of the well model, performing a total system calibration on the well model, and performing a recalibration to fine tune the well model.02-07-2013
20130035919SYSTEMS AND PROGRAM PRODUCT FOR PERFORMING A FULLY AUTOMATED WORKFLOW FOR WELL PERFORMANCE MODEL CREATION AND CALIBRATION - Systems and program product for creating and calibrating production and injection well models for a reservoir, are provided. An example of a system for creating and calibrating well models can include a well performance modeling computer and well performance modeling program product program product. The well performance modeling program product can include instructions that when executed by the well performance modeling computer cause the computer to perform operations including those for performing a comprehensive retrieval or gathering of required data components, feeding the gathered data into well performance software to thereby develop a model of the well, performing an initial calibration of the well model, performing a total system calibration on the well model, and performing a recalibration to fine tune the well model.02-07-2013
20090157367Optimizing Drilling Operations Using Petrotechnical Data - A method for optimizing drilling operations. The method includes providing an earth model of a volume having a well, obtaining petrotechnical data about the volume while drilling the well, comparing the petrotechnical data with the earth model, updating the earth model with the petrotechnical data based on the comparison, and modifying a drilling plan of the well using the updated earth model.06-18-2009
20100332205METHOD OF MODIFIED FACIES PROPORTIONS UPON HISTORY MATCHING OF A GEOLOGICAL MODEL - A method of modifying a geological model representative of an underground reservoir is disclosed which respects average proportions of the lithologic facies imposed by a production data calibration process which has application to petroleum reservoir development. A geographical zone Z is defined within the geological model and an average proportion in zone Z allowing the production data to be calibrated is determined for k facies, with an optimization process. The proportions of these facies are modified using a block indicator cokriging method constrained by the average proportions to be respected. A new geological model constrained by the modified facies proportions is simulated and the development of the underground medium is optimized by the simulated model.12-30-2010
20090043554Updating a Subterranean Model Using at Least Electromagnetic Data - To update a subterranean model, an initial subterranean model is provided, and based on the initial subterranean model, changes to subterranean parameters are predicted using a reservoir simulator. Electromagnetic data representing characteristics of a subterranean structure is computed according to the predicted changes to the subterranean parameters, and the initial subterranean model is modified based on comparing the computed electromagnetic data with observed electromagnetic data.02-12-2009
20090312995SYSTEM AND METHOD FOR MODELING FLOW EVENTS RESPONSIBLE FOR THE FORMATION OF A GEOLOGICAL RESERVOIR - A system configured to model geometric architectures of flow events in geological reservoirs. In one embodiment, the system comprises a geological control input, a rules module, and a modeling module. The geological control input is configured to receive a set of environmental conditions that act as geological controls impacting a geometric architecture of a geological reservoir at a point in geologic time. The rules module is configured to apply a set of rules to the set of environmental conditions present at the point in geologic time to determine geometric flow parameters of the geometric architecture, wherein the set of rules comprise one or more empirical rules. The modeling module is configured to model the geometric architecture based on the geometric flow parameters determined for the flow event by the rules module.12-17-2009
20120221308Portable Drilling Simulation System - A portable drilling simulation system includes a main control computer, a graphic processing computer, a choke console and a blowout preventer console. The main control computer, the graphic processing computer, the choke console and the blowout preventer console are interconnected by a network and serial ports. The blowout preventer console includes a blowout preventer control panel. On the left of the blowout preventer control panel is provided a blowout preventer control zone. On the upper right is provided a throttling manifold control zone. On the lower right is provided a high-pressure manifold control zone. The flow plug console includes a flow plug control panel. A main control program runs on the main control computer and a graphic processing program runs on the graphic computer. The regular blowout preventer console, the regular throttling manifold, the regular high-pressure manifold and the regular flow plug console are integrated into the portable drilling simulation system, thus the simulated operation of several apparatuses on the control panel is realized.08-30-2012
20120191433METHOD FOR REAL-TIME RESERVOIR MODEL UPDATING FROM DYNAMIC DATA WHILE KEEPING THE COHERENCE THEREOF WITH STATIC OBSERVATIONS - The invention is a method for real-time updating of a geological model using dynamic data while maintaining the coherence thereof with static observations. An initial set of reservoir property maps, obtained from stochastic simulations of a random function, are available. Parameters providing new realizations of the random function when applied to the set are selected. New maps are created using initial values of the parameters. As soon as new dynamic data are available, the parameters are modified to reduce a difference between the simulated data for perturbed models and the measured data. Finally, the reservoir is developed using a modified development scheme to account for the deformed maps.07-26-2012
20120191432VISUALIZING FLUID FLOW IN SUBSURFACE RESERVOIRS - In visualizing flow in subsurface reservoirs, a system partitions flow information according to source-sink pairs and streamlines in a reservoir. The system displays dynamic streamline flow indicators and flow animations, such as 3D pie charts, to dynamically show flow contributions and properties at each well. A pie chart displayed at a producer well may have pie wedges that dynamically update to show the percentage of fluid being received via streamlines from each of multiple injectors. Highlighting the chart highlights all wells contributing to the output. Radial sections of each pie wedge may be further mapped to show the flow rate of components, such as oil, water, and gas phases in a streamline. Each chart may show many other properties and may be stacked across time steps. The system also displays streamline properties with animations, which demonstrate flow velocity and model properties, such as phase components, rates, volumes, etc., through color and size codes.07-26-2012
20130073272Discretized Physics-Based Models and Simulations of Subterranean Regions, and Methods For Creating and Using the Same - Methods for creating and using discretized physics-based models of subsurface regions, which may contain a hydrocarbon reservoir or other subsurface feature(s). The methods may include selecting a pre-solved model, applying a mesh to the pre-solved model, defining the shape of the subsurface region to be modeled, and transforming the pre-solved model, to which the mesh has been applied, to the shape of the subsurface region. In some methods, the pre-solved model is an idealized model. In some methods, the mesh is applied to a solution of potential field lines associated with the pre-solved model, and in some methods, the solution of potential field lines is a composite solution of a plurality of solutions of potential field lines. In some methods, one or more supershapes are used to define the shape of the subsurface region. In some methods, a hyperelastic strain deformation calculation is utilized for the transforming.03-21-2013
20110015912Transport Property Data Calculated From Derivative Seismic Rock Property Data For Transport Modeling - At least one transport property for a subsurface region is calculated from derivative seismic data by generating a model relating at least one derivative seismic rock property of a subsurface region to at least one transport property for the subsurface region. At least one transport property is calculated by applying the generated transport property model. Transport phenomena may be simulated with a transport model using at least one transport property generated by applying the model. A model describing evolution of the at least one transport property may be generated within the subsurface region over time, e.g., to facilitate basin modeling of the subsurface region.01-20-2011
20130066617Methods of Hydraulically Fracturing a Subterranean Formation - A method is provided for performing a fracture treatment on a subterranean formation. The method includes acquiring subterranean formation layer geomechanical properties, which include well completion and reservoir data for the subterranean formation. The method also includes inputting geomechanical properties of the formation into a model, and simulating propagation of a network of fractures in the formation. The method further includes predicting a flow rate and pressure distribution throughout the network of fractures by solving governing deformation and flow equations, and predicting a result of the fracture treatment. The model is adjusted if the predicted result is not satisfactory.03-14-2013
20110022368SYSTEM AND METHOD FOR WELL PERFORMANCE OPTIMIZATION - A system, software program, and method to evaluate the performance of a well in a subsurface reservoir are disclosed. A new well module is used to evaluate new wells to be placed in fluid communication with the subsurface reservoir. An existing well module is used to evaluate existing wells that are in fluid communication with the subsurface reservoir. Wells can be evaluated to calculate performance characteristics, optimize performance, resolve any associated performance issues, or a combination thereof. A well screening module is used to quickly calculate properties of a well. A visual display is used to display outputs from the new well module, the existing well module, or the well screening module.01-27-2011
20120116740METHOD FOR CHARACTERIZING THE FRACTURE NETWORK OF A FRACTURED RESERVOIR AND METHOD FOR DEVELOPING IT - The invention is a method for constructing a representation of a fluid reservoir traversed by a fracture network and by at least one well. The reservoir is discretized into a set of grid cells and the fractures are characterized by statistical parameters from observations of the reservoir. An equivalent permeability tensor and an average fracture opening is constructed from an image representative of the fracture network delimiting porous blocks and fractures is then deduced from the statistical parameters. A first elliptical boundary zone centered on the well and at least a second elliptical boundary zone centered on the well which form an elliptical ring with the elliptical boundary of the first zone are defined around the well. The image representative of the fracture network is simplified in a different manner for each of the zones which is used to construct the representation of the fluid reservoir.05-10-2012
20090012765SYSTEM AND METHOD FOR PERFORMING OILFIELD SIMULATION OPERATIONS - The invention relates to a method of simulating operations of an oilfield, which has process facilities and wellsite operatively connected, each wellsite having a wellbore penetrating a subterranean formation for extracting fluid from an underground reservoir. The method steps include selecting simulators for modeling the oilfield with at least one of the simulators having functionality to model fluid injection, selectively coupling each of the simulators according to a predefined configuration, and modeling an injection operation of the oilfield by selectively communicating between the simulators.01-08-2009
20100088082MULTIDIMENSIONAL DATA REPOSITORY FOR MODELING OILFIELD OPERATIONS - A method for performing oilfield operations including collecting a model data set from the oilfield for populating a location of a plurality of locations in a multidimensional data repository, the plurality of locations accessible based on a plurality of dimensions of the multidimensional data repository, performing, using a processor of a computer, analysis of at least the model data set retrieved from the location of the plurality of locations to generate a result, adjusting, using the processor, the multidimensional data repository based on the result, and adjusting the oilfield operations based on the multidimensional data repository.04-08-2010
20120271609METHODS AND COMPUTING SYSTEMS FOR HYDROCARBON EXPLORATION - Methods and computing systems for hydrocarbon exploration are disclosed. In one embodiment, an integrated petroleum systems model is generated for an area of interest, wherein the integrated petroleum systems model is based on: a geological outline, a set of satellite remote sensing data, and a set of airborne remote sensing data.10-25-2012
20120310613METHOD TO IMPROVE RESERVOIR SIMULATION AND RECOVERY FROM FRACTURED RESERVOIRS - A method for modeling flow properties over a series of time increments of a reservoir in an earth formation having a plurality of fractures is disclosed. The method includes: building a three-dimensional stress field representing stresses in the reservoir; building a three-dimensional discrete fracture network (NFM) having fracture flow properties using information obtained from a tool or changes to the stress field; running a flow simulation of the reservoir for a time increment using the NFM to model the flow properties of the reservoir for that time increment; computing a latest change in the three-dimensional stress field from the flow simulation; and incrementing the time increment and iterating the building the NFM using the latest change in the stress field, the running of the flow simulation using the latest NFM, and the computing a latest change in the stress field from the latest running of the flow simulation.12-06-2012
20110264430Methods and Systems To Volumetrically Conceptualize Hydrocarbon Plays - Methods for identifying hydrocarbon plays include applying predictive models to sediment fill volume(s) to provide play-element volume(s) representing at least one play element. Each play-element volume represents at least 1) qualities of the at least one play element and 2) a probability that the at least one play element satisfies determined criteria for each of a plurality of locations within a basin. The methods further include analyzing the play-element volume(s) to define play-concept volume(s) representing hydrocarbon play(s). Each of a plurality of locations within the play-concept volume(s) is attributed with: 1) an identification of each play element associated with the location, 2) the qualities of each play element, 3) the probability for each play element that it satisfies determined criteria, and 4) a composite likelihood that the location represents a hydrocarbon play. At least one of the volumes may be used to identify hydrocarbon play(s).10-27-2011
20090312997USING MODELS FOR EQUILIBRIUM DISTRIBUTIONS OF ASPHALTENES IN THE PRESCENCE OF GOR GRADIENTS TO DETERMINE SAMPLING PROCEDURES - Methods and systems to characterize a fluid in a reservoir to determine if the fluid is in one of equilibrium or non-equilibrium in terms of one of gravity, solvency power, entropy effect or some combination thereof. The method includes acquiring tool data at each depth for each fluid sample of at least two fluid samples wherein each fluid sample is at a different depth and communicating the tool data to a processor. Determining formation properties of each fluid sample to obtain formation property data and determining fluid properties for each fluid sample to obtain fluid property data. Selecting a mathematical model based on one of gravity, solvency power or entropy, in view of a fluid property, using one of tool data, formation property data, fluid property data, known fluid reservoir data or some combination thereof, to predict if the fluid is in an equilibrium distribution or a non-equilibrium distribution.12-17-2009
20100191516Well Performance Modeling In A Collaborative Well Planning Environment - Methods and systems are provided that may be utilized to make completion design an integral part of the well planning process by enabling the rapid evaluation of completion performance. This integration may include an earth model and may specify wellpath parameters, completion parameters, and other parameters in a simulation of operations using the earth model. The simulation generates well performance measures, which may be optimized depending on well performance technical limits. The optimization may be used to maximize an objective function. The system may include multiple users at the same or different locations (e.g. over a network) interacting through graphic user interfaces (GUI's).07-29-2010
20110288843METHOD FOR INTERPRETATION OF DISTRIBUTED TEMPERATURE SENSORS DURING WELLBORE TREATMENT - A method for determining flow distribution in a formation having a wellbore formed therein includes the steps of positioning a sensor within the wellbore, wherein the sensor generates a feedback signal representing at least one of a temperature and a pressure measured by the sensor, injecting a fluid into the wellbore and into at least a portion of the formation adjacent the sensor, shutting-in the wellbore for a pre-determined shut-in period, generating a simulated model representing at least one of simulated temperature characteristics and simulated pressure characteristics of the formation during the shut-in period, generating a data model representing at least one of actual temperature characteristics and actual pressure characteristics of the formation during the shut-in period, wherein the data model is derived from the feedback signal, comparing the data model to the simulated model, and adjusting parameters of the simulated model to substantially match the data model.11-24-2011
20120010865Reservoir Quality Characterization Using Heterogeneity Equations With Spatially-Varying Parameters - A method is disclosed wherein an expression is selected to approximate measurement-based values of a geologic attribute along a dimension of a subsurface formation as a function of position along the dimension. Values for terms of the expression are determined such that the expression satisfies an objective function to within a predetermined amount. The objective function indicates a difference between outputs of the expression and the measurement-based values at similar points along the dimension. The expression and the values of the terms of the expression are outputted, which includes mapping the terms of the expression to represent the geologic attribute in the subsurface formation such that the geologic attribute is described at all locations in the subsurface formation using the expression and the values of the terms of the expression.01-12-2012
20110288842SYSTEM AND METHOD FOR SIMULATING OILFIELD OPERATIONS - A method is provided for simulating oilfield operations. The method may include receiving two or more reservoir models to be simulated and receiving two or more surface models to be simulated. The method may further include automatically generating a communication file to couple the two or more reservoir models with the two or more surface models. Additionally, the method may include simulating the coupled reservoir models and surface models.11-24-2011
20110295581MULTI-PHASIC DYNAMIC KARST RESERVOIR NUMERICAL SIMULATOR - A multi-phasic dynamic reservoir simulator includes a reservoir model for a karst system comprising: a plurality of caves connected via at least one conduit, wherein the plurality of caves and the at least one conduit are filled with at least two types of fluids, an exit point for a fluid to leave the karst system and at least one entry point for a fluid to enter the karst system from a surrounding rock matrix, and a set of parameters defining volumes and distributions of the at least two types of fluids in the plurality of caves and the at least one conduit; and a program having instructions for causing a processor to simulate fluid flows in the reservoir model for the karst system.12-01-2011
20130218545METHODS AND SYSTEMS FOR SUBTERRANEAN BORE HOLE FRACTURE SIMULATION - Apparatus and methods for simulation of bore hole fractures are disclosed. A device for simulating a fracture in a subterranean formation comprises a housing, an inlet for directing a sample fluid to the housing, and a first disk and a second disk positioned within the housing. The second disk is movable relative to the first disk to form an adjustable gap between the first disk and the second disk and the sample fluid flows through the adjustable gap. A common collector receives at least a portion of the sample fluid that flows through at least one of the first disk and the second disk.08-22-2013
20090198477Method For Comparing And Back Allocating Production - Methods and system for incorporating downhole and surface data with models and adjustment algorithms to back allocate flow rates of commingled zones. The models include fluid flow in the reservoir and wellbore, pressure drop across a choke, and fluid flow in the well completion. The models are coupled with an algorithm for comparing the results from the individual commingled zones to the total cumulative commingled volume and adjusting at least one predicted rate so that they match the measured flow rate over a specified time period. One method utilizes a reassignment factor for the adjustment of the predicted rates. These comparisons and allocation adjustments can be accomplished even when the frequency of the commingled flow rate and cumulative measurements, and the frequency of the predicted rates from the model differ from each other and the specified time period.08-06-2009
20090083017PREDICTING BEHAVIOR OF A TOOL USING A MODEL OF A RHEOLOGICAL CHARACTERISTIC OF A FLUID - A model of at least one rheological characteristic of a fluid is provided. According to the model, a behavior of the tool that includes an actuator that uses the fluid is predicted. The behavior of the tool is predicted for at least one expected condition in a well.03-26-2009
20100185427AUTOMATED FIELD DEVELOPMENT PLANNING - A system for automatically optimizing a Field Development Plan (FDP) for an oil or gas field uses a fast analytic reservoir simulator to dynamically model oil or gas production from the entire reservoir over time in an accurate and rapid manner. An objective function defining a Figure of Merit (FoM) for candidate FDPs is maximized, using an optimization algorithm, to determine an optimized FDP in light of physical, engineering, operational, legal and engineering constraints. The objective function for the Figure of Merit, e.g., net present value (NPV) or total production for a given period of time, relies on a production forecast from the fast analytic reservoir simulator for the entire FDP. The position, orientation and dimensions of analytical model elements for the subsurface oil or gas field, as well as the physical properties associated with these elements, correlate to connected flow volume data from a Shared Earth Model (SEM). Uncertainty in the SEM is considered via stochastic sampling. In the presence of uncertainty, the optimum Field Development Plan (FoM) is selected by maximizing an objective function defining a risk-based Figure of Merit for the entire FDP.07-22-2010
20120109612Iterative Inversion of Data From Simultaneous Geophysical Sources - Method for reducing the time needed to perform geophysical inversion by using simultaneous encoded sources in the simulation steps of the inversion process. The geophysical survey data are prepared by encoding (05-03-2012
20120109611System and Method for Performing Wellsite Containment Operations - A system and method for performing an adaptive wellsite operation about a wellsite having a sub-surface system with a wellbore formed through at least one subterranean formation, wherein the subterranean formations are configured to store fluid. The system has a containment unit. The containment unit has a static model unit for generating a static model of a subsurface system. The static model unit further has a defect model unit for generating a defect model. The containment unit has a dynamic leak model unit for generating a dynamic leak model. The containment unit has a leak mitigation unit for providing at least one containment plan. The leak mitigation unit and the dynamic leak model unit are integrated for passing data therebetween and whereby the containment plan may be adapted as the static model, the defect model, and/or the dynamic model is generated.05-03-2012
20100324873Method and system for estimating three phase fluid flow for individual wells - Method for providing reconciled estimates of three phase fluid flow for individual wells and at individual locations in a hydrocarbon production process facility comprising a plurality of wells.12-23-2010
20080288226Integrated Resevoir optimization - A method of managing a fluid or gas reservoir is disclosed which assimilates diverse data having different acquisition time scales and spatial scales of coverage for iteratively producing a reservoir development plan that is used for optimizing an overall performance of a reservoir. The method includes: (a) generating an initial reservoir characterization, (b) from the initial reservoir characterization, generating an initial reservoir development plan, (c) when the reservoir development plan is generated, incrementally advancing and generating a capital spending program, (d) when the capital spending program is generated, monitoring a performance of the reservoir by acquiring high rate monitor data-from a first set of data measurements taken in the reservoir and using the high rate monitor data to perform well-regional and field-reservoir evaluations, (e) further monitoring the performance of the reservoir by acquiring low rate monitor data from a second set of data measurements taken in the reservoir, (f) assimilating together the high rate monitor data and the low rate monitor data, (g) from the high rate monitor data and the low rate monitor data, determining when it is necessary to update the initial reservoir development plan to produce a newly updated reservoir development plan, (h) when necessary, updating the initial reservoir development plan to produce the newly updated reservoir development plan, and (i) when the newly updated reservoir development plan is produced, repeating steps (c) through (h). A detailed disclosure is provided herein relating to the step (a) for generating the initial reservoir characterization and the step (b) for generating the initial reservoir development plan.11-20-2008
20090292516Earth Stress Management and Control Process For Hydrocarbon Recovery - A method for controlling hydrocarbon recovery to improve well interactions while preventing excessive strain or stress-induced well deformations and mechanical failures is described. The method incorporates a systematic, transient analysis process for determining the formation effective displacement, stress and excess pore pressure field quantities at any depth within a stratified subterranean formation resulting from the subsurface injection and/or withdrawal of pressurized fluids.11-26-2009
20120185225SYSTEM AND METHOD FOR PERFORMING DOWNHOLE STIMULATION OPERATIONS - A system and method for performing stimulation operations at a wellsite having a subterranean formation with of a reservoir therein is provided. The method involves generating a plurality of quality indicators from a plurality of logs, and combining the plurality of quality indicators to form a composite quality indicator. The composite quality indicator may be combined with a stress log to form a combined stress and composite quality indicator, the combined stress and composite quality indicator comprising a plurality of blocks with boundaries therebetween. The method may further comprise identifying classifications for the plurality of blocks; defining stages along the combined stress and composite quality indicator based on the classifications; and selectively positioning perforations in select stages based on the classifications thereon.07-19-2012
20120296618Multiscale Geologic Modeling of a Clastic Meander Belt Including Asymmetry Using Multi-Point Statistics - Facies modeling with multi-point statistics (MPS) is used for modeling the outline and internal geometry of a sand belt deposited by high sinuosity, meandering river channels, covering all three different scales relevant to describe the heterogeneity of properties affecting fluid flow in the sand belt. The full complexity of real sediments can be modeled if symmetry and geometric opposition are analyzed and used to condition the modeling processes at each of the scales with auxiliary variables to produce realistic results.11-22-2012
20120296617Methods For Characterization Of Petroleum Fluid And Application Thereof - An improved method that performs downhole fluid analysis of the fluid properties of a reservoir of interest and that characterizes the reservoir of interest based upon such downhole fluid analysis.11-22-2012
20120296619Method and System For Partitioning Parallel Simulation Models - A method is presented for partitioning a simulation model into a plurality of subdomains that may each be assigned to one of a plurality of processors. The method includes creating a representation of a topology graph of a simulation model in a tangible, computer readable medium. The topology graph includes a plurality of computational elements and a plurality of connections between those elements. Each of the plurality of connections is weighted to create a plurality of weights, and each of the plurality of weights is scaled. Optionally, the weights can be mapped to different interval of values. Based on the weights information the topology graph is partitioned into two or more subdomains, wherein a partition boundary follows a local topographical minimum in the topology graph. A subdomain is assigned to each of the plurality of processors.11-22-2012
20100211370Modeling Subsurface Processes On Unstructured Grid - Embodiments of the invention involve forming a prismatic grid and solving a convection-diffusion problem using the prismatic grid and mixed finite element analysis. The prismatic grid may be formed by providing a triangular mesh on a plane of a model. The mesh is then coarsened to make cells that are less desirable larger. The coarsened grid is then projected to form the prismatic grid. Each cell of the grid is then assigned a plurality of degrees of freedom. Mixed finite element analysis of the grid produces a matrix, which is then solved to yield a solution to the convention-diffusion problem.08-19-2010
20110208499METHOD FOR HISTORY MATCHING OF A GEOLOGICAL MODEL COMPRISING A SUB-SEISMIC FAULT NETWORK - A history matching method by gradual deformation of a fault network associated with a geological model is disclosed having application to notably petroleum reservoir development. A fault network is constructed by drawing fault centers in a multifractal density map constructed by a multiplicative cascading and by generating a fault for each fault center. History matching of the model is then performed by deforming the fault network through continuous deformation of the multifractal density map, then by reiterating the center drawing and fault generation stages.08-25-2011
20090125288Hydrocarbon Recovery From a Hydrocarbon Reservoir - A computer system for modelling and controlling a hydrocarbon reservoir through management of fluid flow at individual wells. The computer system has program instructions which operate a computer model which uses oilfield production data to provide a model of future production. The model comprises an optimal regression model which represents injector and producer wells whose fluid flow characteristics are highly correlated with the fluid flow characteristics of the well of interest; the application of parsimonious information criterion techniques to identify well pairs that statistically contribute information to the optimal regression model; and a statistical reservoir model comprising the product of the optimal regression model and a significance matrix. The system is also provided with control means, responsive to the output of the computer model in order to control wells in the hydrocarbon reservoir.05-14-2009
20100004914MODELING THE NONLINEAR HYSTERESIS RESPONSE OF RESERVOIR MEDIA - A method of modeling a nonlinear hysteresis response of reservoir media involves obtaining measurements of core samples from the reservoir to generate a multitude of bounding curves representing primary drainage and primary imbibition characteristics of a reservoir, generating, using a processor, a plurality of constitutive equations based on the multitude of bounding curves and a multitude of material functions, the multitude of material functions determined based on material properties associated with the reservoir, generating, using the processor, an output in a form of capillary-pressure scanning curves based on the multitude of constitutive equations, the capillary-pressure scanning curves representing drainage and imbibition behaviors of the reservoir during an oilfield operation, and storing the output.01-07-2010
20090119082RESERVOIR FRACTURE SIMULATION - Reservoir fracture simulation relates to a method of evaluating a reservoir. Data associated with properties of the reservoir as well as properties of a fracture in the reservoir, is collected. This data is then used in conjunction with a correlation matrix to determine modification parameters of a reservoir model of the reservoir. The correlation matrix corresponds to an empirical functional relationship between the modification parameters and the data, and is obtained based on a plurality of experimental fractures defined in the reservoir. Effects of the fracture are then emulated by selectively modifying the reservoir model using the modification parameters to generate a modified reservoir model. The reservoir is then modeled with the fracture by using the modified reservoir model to generate a result.05-07-2009
20090006057Simulating fluid flow in reservoir with modified grid - A method, system and computer program product for simulating a fluid flow in a reservoir are disclosed. According to an embodiment, the current invention includes a method for simulating a fluid flow in a reservoir, the method comprising: providing an initial grid including multiple grid cells, each grid cell including a cell property; adjusting the initial grid to generated a modified grid in the case that a pressure equivalent radius under the initial grid is smaller than a well bore radius of the reservoir; and simulating the fluid flow in the reservoir based on the modified grid.01-01-2009
20090326895TECHNIQUE AND SYSTEM FOR SEISMIC SOURCE SEPARATION - A technique includes obtaining first seismic data acquired by seismic sensors during a survey of a medium. The first seismic data are indicative of energy attributable to a plurality of interfering seismic sources. The technique includes generating datasets, with each dataset primarily indicating energy attributable to a different one of the seismic sources. For each seismic source, the datasets are generated as follows. The first seismic data are processed to add information to the first seismic data indicative of a geometry of the seismic source to produce second seismic data. The second seismic data is processed to perform migration based on an estimate of a geophysical model of the medium to produce migrated data. The migrated data are processed to perform reverse migration based on the estimate of the geophysical model to produce the dataset.12-31-2009
20090198478OILFIELD EMULATOR - A method for performing oilfield operations for an oilfield. The method includes receiving modeling data and user instructions from a graphical user interface, selectively adjusting at least a portion of the modeling data to generate adjusted modeling data, obtaining an oilfield model based on the user instructions, instantiating first and second simulator instances based on the user instructions for performing a simulation using the adjusted modeling data and the oilfield model, passing interim simulation results between the first and second simulator instances for performing the simulation, displaying a result of the simulation using the graphical user interface, and performing the oilfield operations based on the result of the simulation. Further, the oilfield operations include a gas lift operation of the oilfield and the graphical user interface is configured to emulate the gas lift operation using a wellbore simulator.08-06-2009
20110144965METHOD, SYSTEM AND APPARATUS FOR MODELING PRODUCTION SYSTEM NETWORK UNCERTAINTY - Embodiments of the present disclosure include a method that includes creating a deterministic model representing a production system. The model may include one or more inputs and parameters that are not deterministically known, and one or more outputs. A prior probability density function may be used to determine a prior uncertainty, and a measurement related to a first of the outputs may be obtained. The method may also include determining a posterior probability density function using the prior probability density function, the measurement, and a conditional probability density function. Embodiments of the present disclosure also include a computer-readable medium having a set of computer-readable instructions residing thereon that, when executed, perform acts comprising the foregoing method. Embodiments of the present disclosure further include a computing device that includes a memory, one or more processors operatively coupled to the memory, and functionality operable by the processors to perform the foregoing method.06-16-2011
20120143579METHOD AND SYSTEM FOR CONFIGURING CRUDE OIL DISPLACEMENT SYSTEM - A computer-implemented method for determining one or more operating modes for a crude oil displacement system is provided. The crude oil displacement system is arranged to inject an aqueous displacement fluid into one or more reservoirs, each reservoir comprising a porous and permeable rock formation, wherein crude oil and formation water are contained within a pore space of the rock formation. The crude oil displacement system is for use in displacing crude oil from the pore space of the rock formation. The computer-implemented method comprises the steps of receiving measurement data associated with one or more chemical characteristics of the displacement fluid and one or more chemical characteristics of the rock formation, the crude oil and the formation water of the one or more reservoirs, and inputting the measurement data and data representing a predetermined volume of oil into a computer-implemented predictive model. The predictive model is operated so as to generate predicted data indicative of a predicted additional amount of oil, compared to the predetermined volume of oil, that will be displaced by configuring the crude oil displacement system so as to inject the displacement fluid having the chemical characteristics into the one or more reservoirs. On the basis of the predicted data, the one or more operating modes of the crude oil displacement system are determined. A further computer-implemented method employing the predictive model in which predicted data indicative of one or more predicted chemical characteristics of the displacement fluid are generated is also provided. Additionally, a system for configuring a crude oil displacement system is provided.06-07-2012
20120078600Single Well Anisotropy Inversion Using Velocity Measurements - At least one elastic parameter of a region of interest of a formation is modeled, and at least one velocity measurement acquired in a wellbore extending in the formation is predicted based on the modeling. The model is refined based on the predicted velocity measurement(s) and based on at least one actual measurement acquired from within a single wellbore.03-29-2012
20080262810NEURAL NET FOR USE IN DRILLING SIMULATION - A method of optimizing a drilling tool assembly including inputting well data into an optimization system, the optimization system having an experience data set and an artificial neural network. The method further including comparing the well data to the experience data set and developing an initial drilling tool assembly based on the comparing the well data to the experience data, wherein the drilling tool assembly is developed using the artificial neural network. Additionally, the method including simulating the initial drilling tool assembly in the optimization system and creating result data in the optimization system based on the simulating.10-23-2008
20080262809METHOD AND SYSTEM FOR MODELLING PETROLEUM MIGRATION - A method for modelling the migration of reactant in a subsurface petroleum system is described. The method comprises in part generating a mesh for an area of the petroleum system. The mesh comprises a plurality of nodes, with each node representing a point in space in the area. The method also comprises calculating one or more variables representing one or more physical characteristics at each node in the area and determining the migration of reactant in the petroleum system based on the one or more variables. The method can also handle multiple reactant phases and non-static meshes.10-23-2008
20090222246High-Level, Graphical Programming Language and Tool for Well Management Programming - A reservoir simulation method, which includes building a hierarchical logic diagram having one or more components. Each component represents a block of programming code. The method further includes converting the hierarchical logic diagram to programming code configured to manage the simulation of a reservoir.09-03-2009
20090254325MANAGEMENT OF MEASUREMENT DATA BEING APPLIED TO RESERVOIR MODELS - A data management toolkit for acquiring measurement data regarding hydrocarbon wells and reservoirs, from a database, and processing that data for application to a reservoir model. The data management toolkit is implemented as a web-based application, accessible from remote workstations. The reservoir engineer configures the data management toolkit to acquire measurement data and previously calculated parameter values over a date range, for one or more wells, and also specifies various processing options including filtering, averaging, and the like. Events, such as RFT tests and pressure build-up analyses, may also be included. The web-based data management toolkit is executed on a web server to acquire and process that data, and to then update model files accordingly.10-08-2009
20100138202SYSTEM AND METHOD OF GRID GENERATION FOR DISCRETE FRACTURE MODELING - Computer-implemented systems and methods are provided for generating accurate grids that can be used for simulation of highly complex subsurface reservoirs, such as fractured subsurface reservoirs. A representation of a fractured subsurface reservoir and an explicit discrete fracture represented within the fractured subsurface reservoir are provided. The representation of the fractured subsurface reservoir is decomposed into polyhedral cells. Interfaces between the polyhedral cells are selected to approximate the discrete fracture explicitly represented within the fractured subsurface reservoir. The selected interfaces are used to produce a grid that can be used for constructing a simulation model of the fractured subsurface reservoir.06-03-2010
20100049490ANALYZING AN OILFIELD NETWORK FOR OILFIELD PRODUCTION - A method for performing an analysis of an oilfield network. The oilfield network includes multiple wellsites. The method includes collecting oilfield data from the oilfield network, modeling a first wellsite using the oilfield data to create a first production model of the first wellsite, and modeling a second wellsite using the oilfield data to create a second production model of the second wellsite. The method further includes modeling a sub-network of the oilfield network to create a third production model of the sub-network. The modeling of the sub-network includes identifying a junction of a branch associated with the first wellsite and a branch associated with the second wellsite. A fourth production model is created for the junction by combining the first production model with the second production model. The production model of the sub-network is created using the fourth production model of the junction. The method further includes solving the oilfield network based on the third production model to create a production result, and storing the production result.02-25-2010
20100217574Parallel Adaptive Data Partitioning On A Reservoir Simulation Using An Unstructured Grid - A computer implemented system and method for parallel adaptive data partitioning on a reservoir simulation using an unstructured grid includes a method of simulating a reservoir model which includes generating the reservoir model. The generated reservoir model is partitioned into multiple sets of different domains, each one corresponding to an efficient partition for a specific portion of the model.08-26-2010
20100241410Relative and Absolute Error Models for Subterranean Wells - A relative error model is used to compute a relative uncertainty in the position of a first well with respect to a second well. This relative uncertainty may be computed in real time during drilling and may be used in making subsequent steering decisions during drilling. Moreover, an absolute uncertainty in the position of a first well may be obtained by combining an absolute uncertainty in the position of a second well and the relative uncertainty in the position of the first well with respect to the second well.09-23-2010
20090043555Method for Evaluating an Underground Reservoir Production Scheme Taking Account of Uncertainties - Method for evaluating an underground reservoir production scheme taking account of uncertainties.02-12-2009
20120143578METHOD OF CONSTRUCTING A FLOW MODEL ASSOCIATED WITH CAPILLARY PRESSURE CURVES AND/OR RELATIVE PERMEABILITY CURVES - A method of constructing a reservoir flow model from capillary pressure curves (Pc) and/or relative permeability curves (Kr) is disclosed having application to petroleum reservoir development, acid gas storage and underground water management. After discretizing the reservoir into a set of cells, a principal component analysis is performed for a data table constructed from curves (Pc, Kr) so as to extract principal factors explaining the data. The curves are represented in a representation space constructed from these principal factors and the curves represented in the representation space are classified. At least one curve representative of each class resulting from this classification is then defined and associated with each cell.06-07-2012
20090182541DYNAMIC RESERVOIR ENGINEERING - An example method for performing reservoir engineering includes generating a geological model of a reservoir including a geological horizon, obtaining an offset relative to the geological horizon, and positioning a wellbore equipment item in a well completion design based on the offset. The method further includes calculating an absolute position of the wellbore equipment item in the well completion design based on the offset and a location of the geological horizon in the geological model and updating the geological model to generate an updated location of the geological horizon. The method further includes updating the absolute position of the wellbore equipment item in the well completion design based on the offset and the updated location of the geological horizon and simulating a simulation case including the geological model and the well completion design after updating the absolute position of the wellbore equipment item.07-16-2009
20090319243HETEROGENEOUS EARTH MODELS FOR A RESERVOIR FIELD - A method for creating a heterogeneous earth model (HEM) of a reservoir field includes generating a group of wellsite models for a group of wellsites of the reservoir field based at least on cluster analysis and cluster tagging performed on log data of the group of wellsites, generating a reference model from the group of wellsite models, where cluster tagging errors of the group of wellsite models is minimized to obtain the reference model, constructing a contour plot of the cluster tagging errors on a cluster by cluster basis in the reservoir field, identifying at least one well location and associated core depth interval based on the contour plot for obtaining additional sampling results, and updating the reference model based on the additional sampling results to create the HEM.12-24-2009
20090319242MULTI-SCALE METHOD FOR MULTI-PHASE FLOW IN POROUS MEDIA - A multi-scale method to efficiently determine the fine-scale saturation arising from multi-phase flow in a subsurface reservoir is disclosed. The method includes providing a simulation model that includes a fine-scale grid defining a plurality of fine-scale cells, and a coarse-scale grid defining a plurality of coarse-scale cells that are aggregates of the fine-scale cells. The coarse-scale cells are partitioned into saturation regions responsive to velocity and/or saturation changes from the saturation front. A fine-scale saturation is determined for each region and the saturation regions are assembled to obtain a fine-scale saturation distribution. A visual display can be output responsive to the fine-scale saturation distribution.12-24-2009
20090319241Systems and Methods for Modeing Wellbore Trajectories - Systems and methods for modeling wellbore trajectories using curvature bridging functions. The systems and methods use a clothoid spiral as a bridging curve in the transition zones to reduce tubular stresses/failures in the design of multilateral well paths and extended reach well paths.12-24-2009
20120143577PRIORITIZING WELL DRILLING PROPOSITIONS - Embodiments of the present disclosure include one or more of a method, computing device, computer-readable medium, and system for prioritizing drilling propositions. An example embodiment of the present disclosure may include a method that includes providing a reservoir simulator for simulating a reservoir model, wherein the reservoir model defines a plurality of wells to be drilled. The method may further include storing model state information related to the reservoir model; calculating a potential production of at least a portion of the wells to be drilled by simulating one or more timesteps; and restoring the model state information to the reservoir model. In addition, the method may include using the reservoir simulator to simulate the reservoir model with a drilling priority, wherein the drilling priority is based on the calculated potential production.06-07-2012
20090063117ADDING POSITIONAL INFORMATION FOR SURFACES IN A GEOLOGICAL FORMATION AFTER TRANSFORMING TO A GAPPED REPRESENTATION - A system, method and memory medium for injecting positional information into a geological data set for improved modeling of surfaces in a geological formation. The method involves: (1) displaying a cross section of the formation through a selected subset of wells, where the displayed cross section includes well picks for the selected wells; (2) opening a gap in an unconformity of the displayed cross section, where the gap is opened at one or more wells that intersect the unconformity, where the gap represents non-deposition and/or material that is missing from the formation due to erosion; (3) receiving user input specifying positions of tops within the gap; and (4) closing the gap, where closing the gap includes calculating positions of restored tops based on the positions of the tops specified within the gap, where the positions of the restored tops are usable to model one or more surfaces in the formation.03-05-2009
20090070086METHOD FOR UPDATING A GEOLOGICAL MODEL USING DYNAMIC DATA AND WELL TESTS - Method for optimizing the development of an underground reservoir, wherein a geological model is updated using dynamic data and well tests.03-12-2009
20090070085METHODS FOR PERFORMING SIMULATION OF SURFACTANT FLOODING OF A HYDROCARBON RESERVOIR - The present invention performs numerical simulation of surfactant flooding during enhanced oil recovery of a given hydrocarbon reservoir. The present invention utilizes an improved method for determining relative permeability while maintaining physical consistency when the phase behavior varies between different phase Types. This new relative permeability model maintains the physical consistency in the transition from Type II(−) to Type III to Type II(+) systems and vice versa.03-12-2009
20100312535UPSCALING OF FLOW AND TRANSPORT PARAMETERS FOR SIMULATION OF FLUID FLOW IN SUBSURFACE RESERVOIRS - An upscaling method for efficiently simulating a geological model of subsurface reservoir is disclosed. The method includes providing a fine-scale geological model of a subsurface reservoir associated with a fine-scale grid and a coarse-scale grid. Time-dependent fluid flow solutions, such as fluxes and saturations, are computed for the coarse-scale grid cells. The coarse-scale fluid flow solutions are distributed onto local fine-scale boundaries to obtain local fine-scale boundary conditions. Fine-scale cell fluid flow solutions are computed within the local fine-scale boundaries using the local fine-scale boundary conditions. Two-phase upscaling functions are computed with the fine-scale cell fluid flow solutions and are output to produce a display of fluid flow within the subsurface reservoir.12-09-2010
20110082676STREAMLINE FLOW SIMULATION OF A MODEL THAT PROVIDES A REPRESENTATION OF FRACTURE CORRIDORS - To simulate a subterranean structure having fracture corridors, a model is used to represent the subterranean structure, where the model also provides a representation of the fracture corridors. A streamline simulation is performed using the model.04-07-2011
20090248378Method For Geologic Modeling Through Hydrodynamics-Based Gridding (Hydro-Grids) - A method of hydrodynamics-based gridding (Hydro-Grids) for creating geologic models of subsurface volumes, such as reservoirs, is disclosed. Geologic data is obtained. Vertical grid surfaces are created. Lateral grid surfaces are created to correspond to surfaces of constant geologic time during the deposition of sediments in the subsurface volume. Geologic properties within each cell are represented as values within each cell created by the vertical and lateral surfaces. Reservoir performance is simulated using the represented geologic properties of the subsurface volume. A hydrocarbon reservoir is developed based on the simulated reservoir performance.10-01-2009
20120173220Numerical simulation method for characterizing fluid channelling along large-aperture fractures of reservoirs - A numerical simulation method for characterizing fluid channeling along large-aperture fractures of reservoirs relates to the field of petroleum reservoir development research and computational fluid dynamics. The conventional method can not effectively represent the rapid fluid channeling along large-aperture fractures. Aiming at solving the above technical problem, an advanced method is provided in the present invention. In the invented method, the geometric similarity and hydraulic similarity treatments of large-aperture fractures can be made simultaneously, moreover, the traditional numerical simulation software was improved to be an unstructured grid simulator. Therefore, the method of the present invention can effectively simulate the rapid fluid channeling along large-aperture fractures, consequently it can ensure the reliability of the simulation results and provide reasonable reference for the adjustment and optimization of oil field development plans. The present invention is simple in principle and easy to use, thus it has a great value of application and popularization.07-05-2012
20100217575METHOD FOR CONTROLLING PRODUCTION AND DOWNHOLE PRESSURES OF A WELL WITH MULTIPLE SUBSURFACE ZONES AND/OR BRANCHES - A method for controlling the influx of fluids into a multizone well in which each inflow zone is provided with an inflow control device, comprises: assessing the flux of oil, gas, water and other effluents from the well; monitoring production variables, including ICD position and/or fluid pressure in each inflow zone upstream of each ICD and/or downstream of each ICD; sequentially adjusting the position of each of the ICDs and assessing the flux of crude oil, natural gas and/or other well effluents; monitoring production variables; deriving a zonal production estimation model for each inflow zone of the well; and adjusting each ICD to control the influx of crude oil, natural gas and/or other effluents into each inflow zone on the basis of data derived from the zonal production estimation model for each inflow zone of the well.08-26-2010
20110087476METHOD AND APPARATUS FOR CONFIGURING OIL AND/OR GAS PRODUCTION SYSTEM - Embodiments of the invention identify a plurality of operating points for oil and/or gas producing systems, each operating point being characterised by a set of operating parameters which can be used to control components of the actual oil and/or gas producing system. These generated operating points may be collectively presented in a graphical manner to an operator of the oil and/or gas producing system, who can systemically configure the components of the oil and/or gas producing system to move, in an informal manner, through a path of operating points in order to reach what appears from the generated operating point data to be an optimal operating region. The oil and/or gas producing system may also be referred to as a hydrocarbon producing system.04-14-2011
20110246164Methods For Performing Simulation of Surfactant Flooding of a Hydrocarbon Reservoir - The present invention performs numerical simulation of surfactant flooding during enhanced oil recovery of a given hydrocarbon reservoir. The present invention utilizes an improved method for determining relative permeability while maintaining physical consistency when the phase behavior varies between different phase Types. This new relative permeability model maintains the physical consistency in the transition from Type II(−) to Type III to Type II(+) systems and vice versa.10-06-2011
20110246163Optimizing Well Operating Plans - Methods and systems for making decisions related to the operation of a hydrocarbon well include 1) characterizing effective production capacity of a reservoir over space and time based at least in part on a reservoir potential and a near-well capacity; 2) determining an optimized well potential over space and time relative to the characterized effective production capacity using a well model of a simulated well accessing the reservoir; and 3) determining at least one well operating plan component that can be incorporated into a well operating plan to provide the optimized well potential in a well accessing the reservoir. The optimized well potential may be determined based at least in part on an objective function that considers at least one of a plurality of decision-making factors, such as one or more of operations costs, operational risks, and modeled production rates over the life of the well.10-06-2011
20090312996FEEDBACK CONTROL USING A SIMLATOR OF A SUBTERRANEAN STRUCTURE - To provide feedback control in a simulation framework, any one of plural output metrics from a simulator of a subterranean structure is selected. A value for the selected output metric is received from the simulator. In response to the received value of the selected output metric and a target value of the selected output metric, at least one setting of the simulator is adjusted by a feedback controller.12-17-2009
20090216508Well Modeling Associated With Extraction of Hydrocarbons From Subsurface Formations - A method and apparatus for associated with various phases of a well completion. In one embodiment, a method is described that includes identifying first principle physical laws governing performance of a well completion and parameters associated with the first principle physical laws or the well. A coupled physics simulator is selected based on the first principle physical laws. Then, a coupled physics limit is generated based upon the coupled physics simulator that incorporates the first principle physical laws and the parameters.08-27-2009
20110098997SYSTEM AND METHOD FOR MODELING A GEOLOGIC VOLUME OF INTEREST - A model of a geologic volume of interest that represents the geological architecture of the geologic volume of interest is generated. The model is generated as a series of geologic events at a string of points in geologic time such that each event is deposited or eroded sequentially. A given geologic event is determined based on the topological and/or geological properties of the geologic volume of interest at the time of the geologic event, environmental conditions present at the time of the geologic event that impact geologic formation, deposition, and/or erosion, and/or other considerations. The given geologic event is further determined to honor, at least somewhat, local conditioning data that has been obtained during direct measurements of the geological parameters (and/or trends therein) within the geologic volume of interest.04-28-2011
20110098998MULTISCALE FINITE VOLUME METHOD FOR RESERVOIR SIMULATION - A Multiscale Finite Volume (MSFV) method is provided to efficiently solve large heterogeneous problems; it is usually employed for pressure equations and delivers conservative flux fields to be used in transport problems. It relies on the hypothesis that the fine-scale problem can be described by a set of local solutions coupled by a conservative coarse-scale problem. In numerically challenging cases, a more accurate localization approximation is used to obtain a good approximation of the fine-scale solution. According to an embodiment, a method is provided to iteratively improve the boundary conditions of the local problems, and is responsive to the data structure of the underlying MSFV method and employs a Krylov-subspace projection method to obtain an unconditionally stable scheme and accelerate convergence. In one embodiment the MSFV operator is used. Alternately, the MSFV operator is combined with an operator derived from the problem solved to construct the conservative flux field.04-28-2011
20110077928METHODS AND SYSTEMS FOR DESIGN AND/OR SELECTION OF DRILLING EQUIPMENT BASED ON WELLBORE DRILLING SIMULATIONS - Methods and systems may be provided for simulating forming a wide variety of directional wellbores including wellbores with variable tilt rates and/or relatively constant tilt rates. The methods and systems may also be used to simulate forming a wellbore in subterranean formations having a combination of soft, medium and hard formation materials, multiple layers of formation materials and relatively hard stringers disposed throughout one or more layers of formation material.03-31-2011
20120303347METHOD FOR PHYSICAL MODELING OF RESERVOIRS - Disclosed is method for simulating materials subsurface to the earth. The method includes: receiving dimensions of each subsurface material to be simulated; receiving a value of a property for each of subsurface materials to be simulated; and constructing a three-dimensional physical model of the subsurface materials using a three-dimensional printer, the three-dimensional printer being configured to print one or more layers of a print material for each of the subsurface materials being represented in the model wherein dimensions and a property value of the print material for each subsurface material being represented corresponds to the dimensions and the property value for that subsurface material.11-29-2012
20110060573Decision Management System and Method - A system and method may be configured to support the evaluation of the economic impact of uncertainties associated with the planning of a petroleum production project, e.g., uncertainties associated with decisions having multiple possible outcomes and uncertainties associated with uncontrollable parameters such as rock properties, oil prices, etc. The system and method involve receiving user input characterizing the uncertainty of planning variables and performing an iterative simulation that computes the economic return for various possible instantiations of the set of planning variables based on the uncertainty characterization. The system and method may (a) utilize and integrate highly rigorous physical reservoir, well, production flow, and economic models, and (b) provide a mechanism for specifying constraints on the planning variables. Furthermore, the system and method may provide a case manager process for managing multiple cases and associated “experimental runs” on the cases.03-10-2011
20110040543VIRTUAL RESERVOIR SENSOR - One or more computer-readable media include computer-executable instructions to instruct a computing system to receive simulation results for future behavior of a reservoir that includes a material production well and a fluid injection site; define a virtual sensor as being located between the material production well and the fluid injection site; determine fluid saturation at the virtual sensor based at least in part on the simulation results; and issue a notification if the fluid saturation at the virtual sensor exceeds a fluid saturation limit. Various other apparatuses, systems, methods, etc., are also disclosed.02-17-2011
20100312536INTEGRATING FIELD DATA - An example method of integrating field data that includes obtaining the field data associated with a field and performing a production analysis on the field data to generate a production output, the production analysis performed by a production engineering tool. The method further includes transforming the field data to obtain transformed field data requested by a field application and sending the transformed field data from the production engineering tool to the field application, the field application performing a field analysis using the transformed field data to generate a field output. The method further includes generating a comparison of the production output and the field output.12-09-2010
20110213601METHOD OF AUTOMATICALLY CONTROLLING THE TRAJECTORY OF A DRILLED WELL - Steering behavior model can include build rate and/or turn rate equations to model bottom-hole assembly behavior. Build and/or turn rate equations can be calibrated by adjusting model parameters thereof to minimize any variance between actual response 09-01-2011
20100305927UPDATING A RESERVOIR MODEL USING ORIENTED CORE MEASUREMENTS - A method of updating a model of a subsurface reservoir using a sidewall core obtained from within the reservoir that comprises: making one or more directionally dependent measurements on said sidewall core, determining the in-situ position and orientation of the sidewall core, and updating a reservoir model of the reservoir using the directionally dependent measurements and the in-situ position and orientation of said sidewall core. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.12-02-2010
20090006058Iterative Drilling Simulation Process For Enhanced Economic Decision Making - An iterative drilling simulation method and system for enhanced economic decision making includes obtaining characteristics of a rock column in a formation to be drilled, specifying characteristics of at least one drilling rig system; and iteratively simulating the drilling of a well bore in the formation. The method and system further produce an economic evaluation factor for each iteration of drilling simulation. Each iteration of drilling simulation is a function of the rock column and the characteristics of the at least one drilling rig system according to a prescribed drilling simulation model.01-01-2009
20080319726SYSTEM AND METHOD FOR PERFORMING OILFIELD SIMULATION OPERATIONS - The invention relates to a method of performing a gas operation of an oilfield having a subterranean formation with at least one reservoir positioned therein. The method steps include modeling the gas operation of the oilfield using a multi-domain simulator by coupling a static model of the subterranean formation, a dynamic model of the subterranean formation, and a well model, wherein the multi-domain simulator comprises the static model, the dynamic model, and the well model, defining a development plan for the gas operation based on the modeling, and performing gas injection according to the development plan.12-25-2008
20080255816System and method for evaluating petroleum reservoir using forward modeling - This invention relates to petroleum reservoir characterization. It uses a novel system and method to generate a system of reservoir models, and then use a series of simulation techniques to simulate the models. The models are refined through each simulation and comparison step by comparing the results of the simulation with the known data from the reservoir. The invention can be applied to different reservoirs which have different known properties. Simulation techniques such as EM test forward calculation, stochastic reservoir modeling, streamline forward calculation are all candidates of simulation methods disclosed in the invention.10-16-2008
20080255817MODELING THE TRANSIENT BEHAVIOR OF BHA/DRILL STRING WHILE DRILLING - A method, system and computer program product for performing a drilling operation for an oil field, the oil field having a subterranean formation with geological structures and reservoirs therein. The method involves creating a finite-difference model to simulate behavior of a drilling assembly used to drill a wellbore in the drilling operation, performing a simulation of the drilling operation using the finite-difference model, analyzing a result of the simulation, and selectively modifying the drilling operation based on the analysis.10-16-2008
20110054869Modeling Dynamic Systems By Visualizing and Narrowing A Parameter Space - A method for modeling a dynamic system (e.g., geological system) comprises: constructing an input parameter space for a model of the geological system, the input parameter space including more than three dimensions, and the model associated with response data, representing the input parameter space visually with three or fewer dimensions, reducing the input parameter space by conditioning the parameter space using at least a subset of the response data, and updating the representation of the input parameter space to visually represent the reduction of the parameter space.03-03-2011
20110264431METHOD AND SYSTEM FOR PORE PRESSURE PREDICTION - A method for performing an oilfield operation at a wellsite having a drilling rig configured to advance a drilling tool into a subsurface formation. The method includes generating a borehole temperature model for an area of interest using water depth information and a vertical stress model, generating a formation temperature model using the borehole temperature model, generating a mud-weight pressure model using the formation temperature model and pressure coefficients, generating a formation pore pressure model using the mud-weight pressure model, and adjusting the oilfield operation based on the formation pore pressure model.10-27-2011
20110264429SYSTEM FOR OPTIMIZING A DRILLING OPERATION AND METHOD FOR USING SAME - A system and method for optimizing a drilling operation is provided. The system has a drilling a drilling operation optimization unit. The drilling operation optimization unit has a base model unit for producing a base model of the reservoir and a reservoir stress unit for producing a three dimensional stress model of the reservoir. The drilling operation optimization unit has a trajectory unit for determining at least one property for at least one wellbore trajectory based on the base model and the three dimensional stress model, wherein each of the wellbore trajectories is selectable by an operator. The system has an operator station for inputting data into the drilling operation optimization unit at the wellsite and a drilling tool for forming a wellbore along at least one of the at least one selected wellbore trajectories.10-27-2011
20110060572DYNAMIC SUBSURFACE ENGINEERING - An example system includes interconnected modeling modules that share knowledge to create a unified earth model dynamically representing a subsurface site. The system models and may simulate subsurface operations associated with, for example: hydrocarbon production and stimulation, natural gas storage, carbon capture and storage, aquifer maintenance, geothermal energy production, and in-situ leachable ore processing. The system integrates a reporting module, and also an economic module to evaluate cost versus benefit of each subsurface operation. A related example method for performing subsurface engineering includes generating a model of a subsurface site including a geological horizon, obtaining an offset relative to the geological horizon, and locating an operation based on the offset. When field data update the model in real time, positions of 3D objects and 3D surfaces are dynamically updated in the model, including the positions of the modeled operations.03-10-2011
20120150517Calculating Liquid Levels in Arbitrarily Shaped Containment Vessels Using Solid Modeling - Systems and method for simulating liquid containment behavior. The system comprises a solid modeler and a nonlinear equation solver. The nonlinear equation solver takes as input the solid model representation of the containment vessel from the solid modeler, a desired orientation in space, dynamic conditions (e.g., lateral acceleration) and an amount of liquid. To find the level of liquid in the vessel, the system solver iteratively performs successive Boolean subtractions using an infinite horizontal half-space that represents the liquid level of the vessel. The resulting sliced solid model is used to compute the volume of the liquid at that level. The iterative system solver terminates when the computed volume of the sliced containment vessel matches the specified volume of liquid (e.g., fuel) within a given tolerance. To accommodate dynamic situations, e.g., when acceleration is present, the horizontal liquid plane is replaced with a plane at an angle that corresponds to the total acceleration.06-14-2012
20100179797Systems and Methods for Planning Well Locations with Dynamic Production Criteria - Systems and methods for automatically and optimally planning multiple well locations within a reservoir simulator. The systems and methods use dynamic production criteria to create and optimize well target completion intervals and the associated well geometries for new wells dynamically, and directly within a reservoir simulator.07-15-2010
20120310614METHOD AND SYSTEM FOR PREDICTING THE EFFECT OF MICROBES INJECTED INTO AN OIL-BEARING RESERVOIR - A method for predicting the effect of microbes injected into an oil-bearing reservoir, the oil-bearing reservoir being capable of being represented by a first computer-generated grid comprising a first plurality of grid blocks, is provided. Measurement data representing the effect of injecting the microbes into a multiple coreflood apparatus is received. The multiple coreflood apparatus comprises at least first and second material samples indicative of a rock formation associated with said oil-bearing reservoir, the first and second samples being capable of being represented by a second computer-generated grid comprising a second plurality of grid blocks, the first and second samples being representative of different regions of the reservoir and being connected such that microbes injected into the first sample are able to flow to the second sample. Selected data of the received measurement data is input into a computer-implemented reservoir model configured to simulate said effect of microbe injected in relation to the second grid. The reservoir model is executed to generate reservoir model data indicative of the effect of injecting the microbes into the multiple coreflood apparatus. Parameters of the reservoir model are adjusted by matching the reservoir model data against the measurement data, in order to calibrate the reservoir model. The calibrated reservoir model is then executed for the first grid to predict the effect of injecting the microbes into the reservoir. A corresponding system, and a method and apparatus for generating data indicative of the effect of injecting microbes into an oil-bearing reservoir, are also provided.12-06-2012
20090299714DYNAMIC UPDATING OF SIMULATION MODELS - The preferred embodiment of the instant invention preferably takes place in three stages. In the first stage, a determination is made as to which sands (or other reservoir bodies) are in fluid communication with the existing wells, and the disconnected sands are removed from the fine scale geological model. In the second stage, the transmissibilities in the fine scale model are upscaled to the course grid for direct use in the simulation. In the third stage the connected sands only are upscaled and a simulation is carried forward to the point when a new well is to be drilled. The pressure and saturation data are exported to combine with newly connected sands (reservoir bodies), and new pressure and saturation is calculated. The new values are exported in the simulation model and simulation run is continued.12-03-2009
20090254324Method for defining regions in reservoir simulation - A method is disclosed, which is practiced by a reservoir simulator, for simulating a reservoir and generating a set of simulation results, the simulation results including a framework, the framework further including a plurality of grid cells, comprising: generating one or more static and dynamic regions within the grid cells of the framework of the simulation results, the static and dynamic regions each having region values, wherein the region values of the static regions cannot be allowed to change dynamically, and wherein the region values of the dynamic regions can be allowed to change dynamically.10-08-2009
20110191080MULTILEVEL PERCOLATION AGGREGATION SOLVER FOR PETROLEUM RESERVOIR SIMULATIONS - An efficient percolation aggregation solver methodology captures media connectivity and continuity to reliably incorporate relevant flow solution trends in subterranean formation models. The approach allows introduction of meaningful physical information that is generally overlooked by state-of-the-art algebraic algorithms in the solution process. Percolation aggregation extends the efficiency and robustness of solution methods used to solve scientific and engineering problems.08-04-2011
20100057418Method for Quantifying Reservoir Connectivity Using Fluid Travel Times - The present application describes a method and system associated with the production of hydrocarbons. In the method, fluid travel time models are constructed from a reservoir model. Then, reservoir connectivity measures are calculated from the fluid travel time models and analyzed to determine a location for at least one well. Based on the analysis, one or more wells may be drilled and hydrocarbons produced.03-04-2010
20110153300System and Method For Planning A Drilling Operation - A method of planning a drilling operation IS provided that comprises selecting a set of targeted regions based on data from a three-dimensional shared earth model and generating at least one targeted segment within each one of the set of targeted regions The method further comprises defining at least one application agent for the purpose of evaluating the at least one targeted segment within each one of the set of targeted regions based on a potential payout in terms of production of hydrocarbons The exemplary method additionally comprises identifying at least one well trajectory through the at least one targeted segment within each one of the set of targeted regions And the method comprises employing the at least one application agent to evaluate well trajectories based on the potential payout in terms of at least one of production of hydrocarbons, drilling complexity, cost or stability of well planning06-23-2011
20110307230Optimizing Reservoir Performance Under Uncertainty - One or more methods for optimizing reservoir development planning include a source of characterized input data, an optimization model, a baseline model for simulating the reservoir, a modified model, and one or more solution routines interfacing with the optimization model. The optimization model can consider unknown parameters having uncertainties directly within the optimization model. The modified model can systematically address uncertain data, for example comprehensively or even taking all uncertain data into account. Accordingly, the modified model is optimized to flexible or robust solutions. Final reservoir development plans are generated based on optimized model results.12-15-2011
20120041737Dynamic reservoir characterization - Method for dynamic reservoir characterization by generating, and visually presenting a three-dimensional reservoir model defined by a data set of cells, each cell describing a geometric shape in space and time having an array of physical properties.02-16-2012
20120041736SYSTEM AND METHOD FOR ANALYZING DATA - A computer-implemented method, computer program product, and computing system for obtaining an oil field modeling file. One or more values are associated with one or more variables included within the oil field modeling file. The oil field modeling file is executed to generate one or more result sets. A portion of each of the one or more result sets is compared with empirically-derived data related to the portion.02-16-2012
20110112815METHOD OF SELECTING ADDITIVES FOR OIL RECOVERY - A method is described for selecting an additive for enhanced recovery from a subterranean hydrocarbon reservoir including the steps of using parameters characterizing rock type and surfaces in the reservoir, pore geometry and/or distribution, hydrocarbons and/or other constituent elements identified as being present in the reservoir, using parameters characterizing an injection fluid or fluid mixture to be injected into the reservoir, using parameters characterizing the additive to be added to the injection fluid and its concentration; using the parameters to determine at a first level of molecular dynamic modeling the effect of the additive on the interfacial tension between hydrocarbon and water/brine or an equivalent parameter, using the parameters and results derived from the first level of molecular dynamic modeling to determine at a second coarser level of molecular dynamic modeling wettability effects or an equivalent parameter and using the parameters and results derived from first and second level of molecular dynamic modeling to determine at a third coarser level of molecular dynamic modeling imbibition or drainage effects.05-12-2011
20120041738Method For Upscaling A Reservoir Model Using Deep Reading Measurements - A method of upscaling for reservoir simulation is disclosed, comprising: inverting a set of deep reading measurements constrained by upscaled multi-well data, and, in response to the inverting step, upscaling for reservoir simulation.02-16-2012
20110071810Method for Controlling Fluid Production From a Wellbore By Using a Script - In one aspect, a method is provided for controlling fluid flow in a wellbore containing a plurality of production devices, wherein the method includes the steps of defining a first setting of each production device in the plurality of production devices, defining a change in a parameter relating to fluid flow in the wellbore and using a model to determine a second setting for at least one of the plurality of production devices based on the change in the parameter. The method also includes the step of generating a script corresponding to the second setting, wherein the script is configured to be implemented without modification, and storing the script in a suitable storage medium.03-24-2011
20100131257Systems and Methods for the Determination of Active Constraints in a Network Using Slack Variables - Systems and methods for determining active constraints in a surface facility network, which include the use of slack variables and multipliers in system equations to eliminate the extraneous (inactive) constraints.05-27-2010
20120004892Reservoir Simulation of Giant Subsurface Reservoirs With Accelerated Phase Equilibrium Determination - A computer system analyzes data from giant subsurface hydrocarbon reservoirs which are organized into a number of component cells and simulates the conditions in the reservoirs based on determination of thermodynamic phase equilibrium using equation of state (EOS) modeling. The computer system takes the form of a heterogeneous (hybrid) computer environment which includes computer processor units (or CPU's) and graphical processing units (or CPU's). The system takes advantage of computational acceleration capabilities of the graphical processing units while utilizing the computer processing units for execution control, input/output of data and memory. Processing time requirements are reduced by more than an order of magnitude speed improvement over existing methods.01-05-2012
20100235154Dynamic Connectivity Analysis - Methods, computer-readable mediums, and systems analyze hydrocarbon production data from a subsurface region to determine geologic time scale reservoir connectivity and production time scale reservoir connectivity for the subsurface region. Compartments, fluid properties, and fluid distribution are interpreted to determine geologic time scale reservoir connectivity and production time scale reservoir connectivity for the subsurface region. A reservoir connectivity model based on the geologic time scale and production time scale reservoir connectivity for the subsurface region is constructed, wherein the reservoir connectivity model includes a plurality of production scenarios each including reservoir compartments, connections, and connection properties for each scenario. Each of the production scenarios is tested and refined based on production data for the subsurface region.09-16-2010
20110166843Method For Modeling Deformation In Subsurface Strata - A method for modeling deformation in subsurface strata, including defining physical boundaries for a geomechanical system. The method also includes acquiring one or more mechanical properties of the subsurface strata within the physical boundaries, and acquiring one or more thermal properties of the subsurface strata within the physical boundaries. The method also includes creating a computer-implemented finite element analysis program representing the geomechanical system and defining a plurality of nodes representing points in space, with each node being populated with at least one of each of the mechanical properties and the thermal properties. The program solves for in situ stress at selected nodes within the mesh.07-07-2011
20120016649SYSTEM AND METHOD FOR CONTROLLING AN ADVANCING FLUID FRONT OF A RESERVOIR - A system and method for controlling an advancing water front in a reservoir toward a wellbore is provided. The system has a production control unit. The production control unit has a reservoir unit for producing a reservoir model and a production path unit for producing a production path model that determines at least one pressure parameter about the wellbore during a life of the wellbore. The production control unit has a production optimizer unit for producing a well plan that optimizes a function of the wellsite. The production control unit may be for controlling an advancing fluid front in the reservoir with at least one control device, and wherein a production path is constructed based on the well plan.01-19-2012
20120059640THERMODYNAMIC MODELING FOR OPTIMIZED RECOVERY IN SAGD - One or more computer-readable media include computer-executable instructions to instruct a computing system to receive input as to physical characteristics of a resource recovery system and a resource reservoir; simulate fluid thermodynamics of the system and the reservoir; and output information as to phase composition, for example, in at least one dense phase affected by the resource recovery system. Various other apparatuses, systems, methods, etc., are also disclosed.03-08-2012
20120059639Machine, Computer Program Product and Method to Generate Unstructured Grids and Carry Out Parallel Reservoir Simulation - A machine, computer program product, and method to enable scalable parallel reservoir simulations for a variety of simulation model sizes are described herein. Some embodiments of the disclosed invention include a machine, methods, and implemented software for performing parallel processing of a grid defining a reservoir or oil/gas field using a plurality of sub-domains for the reservoir simulation, a parallel process of re-ordering a local cell index for each of the plurality of cells using characteristics of the cell and location within the at least one sub-domain and a parallel process of simulating at least one production characteristic of the reservoir.03-08-2012
20120059641Iterative Method and System To Construct Robust Proxy Models For Reservoir Simulation - A method, system and computer program product is disclosed for utilizing proxy models to evaluate a subterranean reservoir. The method includes constructing a proxy model from a set of sampling points to approximate simulation outputs of a reservoir model. The set of sampling points is updated by adding at least one new sampling point that is selected from a location associated with surface non-linearities such as gradients, curvature, and bending energy. Response surface values at new sampling points and distances to existing sampling points can also be used to evaluate new sampling points. Proxy models are refined with the updated set of sampling points until the proxy model satisfies a predetermined stopping criterion, such as when a predetermined number of iterations are reached or when changes to the response surface are below a predetermined threshold.03-08-2012
20120158388MODELING SHOCK PRODUCED BY WELL PERFORATING - A method of utilizing a shock model for prediction of perforating effects can include recording measurements of the perforating effects on an actual perforating string in a wellbore, adjusting the shock model so that predictions of the perforating effects output by the shock model substantially match the measurements of the perforating effects, and causing the adjusted shock model to predict the perforating effects for a proposed perforating string. A method of predicting perforating effects on a perforating string in a wellbore can include inputting a three dimensional well model and a three dimensional model of the perforating string into a shock model, and causing the shock model to predict the perforating effects on the perforating string.06-21-2012
20120072196CORE COLUMN SIMULATOR FOR A WASTEWATER BIOTREATMENT SYSTEM AND METHODS OF USE - A core column simulator device and methods of assessing the efficacy of a wastewater biotreatment system using the core column simulator device are disclosed.03-22-2012
20120130696Optimizing Well Management Policy - A field operating policy for a subsurface region is optimized by setting initial policy parameters for the subsurface region. Fluid flow within a subsurface region is simulated, wherein the simulation includes optimizing an objective function for field operating policy, the objective function corresponding simultaneously to the modeled fluid flow characteristics of one or more wellbores within the subsurface region and relating to at least one production system performance parameter. Optimizing the objective function for field operating policy may include optimizing the initial policy parameters for the subsurface region with an over time optimization technique, wherein the policy parameters are optimized for a predetermined policy period. An enhanced value of the objective function is determined at each timestep within the predetermined policy period. The optimized policy parameters for the predetermined policy period may serve as constraints in the determination of an enhanced value of the objective function at each timestep within the predetermined policy period.05-24-2012
20120158389Method and System For Rapid Model Evaluation Using Multilevel Surrogates - The present techniques disclose methods and systems for rapidly evaluating multiple models using multilevel surrogates (for example, in two or more levels). These surrogates form a hierarchy in which surrogate accuracy increases with its level. At the highest level, the surrogate becomes an accurate model, which may be referred to as a full-physics model (FPM). The higher level surrogates may be used to efficiently train the low level surrogates (more specifically, the lowest level surrogate in most applications), reducing the amount of computing resources used. The low level surrogates are then used to evaluate the entire parameter space for various purposes, such as history matching, evaluating the performance of a hydrocarbon reservoir, and the like.06-21-2012
20110106514FORMATION MODELING WHILE DRILLING FOR ENHANCED HIGH ANGLE FOR HORIZONTAL WELL PLACEMENT - Methods for three-dimensionally characterizing a reservoir while drilling a high angle or horizontal wellbore through the reservoir are disclosed. An initial reservoir model for the reservoir is selected and a section is extracted for a planned trajectory of the wellbore. A secondary model is generated by performing secondary modeling for at least part of the planned trajectory. An area of interest is identified within the secondary model where statistical uncertainty is high. Possible causes of the statistical uncertainty are identified for the area of interest within the secondary model that are not present or accounted for in the initial reservoir model. A set of parameters for the area of interest are defined at that are based on the possible causes of statistical uncertainty. The area of interest is logged with at least one logging while drilling LWD tool. Sensitivities of the LWD tool response to the subset of parameters are evaluated by performing at least one tertiary model for a range of the subset of parameters. The most sensitive parameters from the subset of parameters and corresponding measurements are identified. One or more real-time LWD measurements to be used for proactive well placement along the planned trajectory are identified and are based on the most sensitive parameters. The initial reservoir model is updated while drilling with information from the tertiary model. The model update is based on physics-based modeling or on inversion and on running multiple models and selection of a best candidate model based on correlations between the tool measurements and modeled results for each geologic model.05-05-2011
20100250214METHODS TO ESTIMATE SUBSURFACE DEVIATORIC STRESS CHARACTERISTICS FROM BOREHOLE SONIC LOG ANISOTROPY DIRECTIONS AND IMAGE LOG FAILURE DIRECTIONS - Methods and apparatus for estimating stress characteristics of formations. The method comprises: (a) acquiring sonic anisotropy data, image data or both associated with at least one borehole (b) employing sonic anisotropy data to estimate fast shear direction (FSA) to extract FSA observed data; (c) computing FSA from forward modeling, forward modeling utilizes a first deviatoric stress tensor to extract FSA predicted data; (d) computing FSA misfit from difference between FSA observed data and FSA predicted data to obtain computed FSA misfit relating to first deviatoric stress tensor; (e) if computed FSA misfit is equal to or less than a defined value, then store computed FSA misfit, otherwise repeat steps (d)-(h) using another deviatoric stress tensor so a different deviatoric stress tensor is used for each repeat; (f) selecting smallest stored computed misfit from group consisting of stored computed FSA misfit, at least one other stored computed misfit or combination thereof.09-30-2010
20100250215METHODS OF MODELING FLOW OF GAS WITHIN A RESERVOIR - Methods of modeling flow of gas within a reservoir are provided. A particular method includes generating a representation of a gas reservoir, where the gas reservoir includes at least two phases of matter. The representation of the gas reservoir models the gas reservoir as a single phase. The method also includes modeling flow of gas within the gas reservoir using the representation.09-30-2010
20100250216SYSTEM AND METHOD FOR CHARACTERIZING FRACTURES IN A SUBSURFACE RESERVOIR - The disclosed methods, systems, and software are described to optimize fracture characteristics and simulate fluid flow rates in a well model. The well model, which includes at least one fracture intersecting a production well, is generated with static and dynamic data. Fluid flow in the well model is simulated to obtain simulated fluid flow rates between fractures and the well. Fracture properties, such as length, height and aperture, are then updated responsive to measured and simulated fluid flow rates. Multiple simulation runs and updating of the fracture properties can be performed until the simulated fluid flow rates converge with the measured fluid flow rates. Pressure data can be used to determine gridblock permeability, which in turn helps constrain the model, thus providing more reliable fracture properties. Uncertainty ranges of the fracture properties can also be calculated.09-30-2010
20100204972Method For Predicting Well Reliability By Computer Simulation - Methods of predicting earth stresses in response to pore pressure changes in a hydrocarbon-bearing reservoir within a geomechanical system, include establishing physical boundaries for the geomechanical system and acquiring reservoir characteristics. Geomechanical simulations simulate the effects of changes in reservoir characteristics on stress in rock formations within the physical boundaries to determine the rock formation strength at selected nodes in the reservoir. The strength of the rock formations at the nodes is represented by an effective strain (ε08-12-2010
20120215513Method and Apparatus For Reservoir Modeling and Simulation - A method and apparatus for generating a simulation grid for a reservoir model based on a geological model comprising horizons, constraints and multiple geological grid cells. A pre-image is generated corresponding to the geological grid cells, the pre-image comprising a surface and the modeling constraints being mapped onto the surface. A constrained two-dimensional grid is generated on the pre-image, the two-dimensional grid comprising multiple grid cells. Simulation layer boundaries are selected from the geological model and the constrained two-dimensional grid is projected onto the simulation layer boundaries. Prismatic cells are then generated to form the three-dimensional simulation grid. The method of generating a grid as herein described may be incorporated in existing reservoir simulators to improve their accuracy.08-23-2012
20120215512System And Method For Uncertainty Quantification In Reservoir Simulation - A computer-implemented reservoir prediction system, method, and software are provided for quantifying uncertainty and evaluating production performance of a subterranean reservoir. A reservoir simulation model representing a subterranean reservoir and an associated distribution of input variables are provided. A plurality of polynomial chaos expansions is generated. Each polynomial chaos expansion is used to approximate a simulation output of the reservoir simulation model for the distribution of input variables. Deterministic coefficients of the polynomial chaos expansions are calculated using a sampling process, such as a quasi-Monte Carlo method using a low discrepancy sequence. An output variable, such as cumulative oil production, and associated output variable uncertainty are forecasted using the polynomial chaos expansions and the deterministic coefficients such that production performance of the subterranean reservoir can be evaluated.08-23-2012
20120136641MACHINE, COMPUTER PROGRAM PRODUCT AND METHOD TO CARRY OUT PARALLEL RESERVOIR SIMULATION - A machine, computer program product, and method to enable scalable parallel reservoir simulations for a variety of simulation model sizes are described herein. Some embodiments of the disclosed invention include a machine, methods, and implemented software for performing parallel processing of a grid defining a reservoir or oil/gas field using a plurality of sub-domains for the reservoir simulation, a parallel process of re-ordering a local cell index for each of the plurality of cells using characteristics of the cell and location within the at least one sub-domain and a parallel process of simulating at least one production characteristic of the reservoir.05-31-2012
20100174517Method For Prediction In An Oil/Gas Production System - Method in an oil and/or a gas production system including a plurality of oil and/or gas wells each producing a multiphase fluid stream, adapted for predicting change in produced fluids resulting from change in manipulated variables. Fitted model parameters which express the relationship between the change in manipulated variables and the produced fluids are determined from a set of historical production measurements. The method includes the steps of choosing a model structure which predicts change in produced fluids as a function of the change in manipulated variables, where the predicted change in produced fluids depends on the value of fitted model parameters, determining fitted model parameters so that predictions of produced fluids match said historical production measurements as closely as possible, and determining a quality tag that describes the uncertainty of the predictions of change in produced fluids.07-08-2010
20120215511SYSTEM AND METHOD FOR MODELING A SUBTERRANEAN RESERVOIR - A computer-implemented reservoir prediction system, method, and software are provided for updating simulation models of a subterranean reservoir. An ensemble of reservoir models representing a subterranean reservoir having non-Gaussian characteristics is provided, along with reservoir data from the subterranean reservoir used to condition the ensemble of reservoir models. For each of the reservoir models in the ensemble of reservoir models, a constrained optimization with equality constraints and inequality constraints are solved using a constrained Kernel Ensemble Kalman Filter to obtain a constrained optimal solution. The constrained optimal solutions are assembled to update the ensemble of reservoir models. The updated ensemble of reservoir models are consistent with the reservoir data provided from the subterranean reservoir and the non-Gaussian characteristics of the subterranean reservoir are preserved.08-23-2012
20100299124Apparatus and Method for Modeling Well Designs and Well Performance - In one aspect, a method of estimating fluid flow contribution from each producing zone of multi-zone production well is provided, which method may include: defining a wellhead pressure; determining a first inflow performance relation (IPR11-25-2010
20100299126METHOD FOR UNCERTAINTY QUANTIFIATION IN THE PERFORMANCE AND RISK ASSESSMENT OF A CARBON DIOXIDE STORAGE SITE11-25-2010
20100299125POROUS MEDIUM EXPLOITATION METHOD USING FLUID FLOW MODELLING - Porous A porous medium exploitation method having application to petroleum exploitation is disclosed using coupling between a reservoir model and a near-wellbore model for modelling fluid flows. Fluid flows within the medium are simulated using a reservoir simulator and a near-wellbore simulator. At each time step, the boundary conditions used by the second simulator are calculated by means of with the reservoir simulator. Numerical productivity indices used by the reservoir simulator are calculated by means of using the near-wellbore simulator. The fluid flows within the porous medium during a given period of time are modelled by repeating the previous stages for several time steps. An optimum medium exploitation scenario is deduced determined from this modelling by taking into accounting for, for example, a well damage due to a drilling fluid, an injection of a polymer solution or of an acid solution in the well.11-25-2010
20100299123WELL PLACEMENT IN A VOLUME - Implementations of well placement in a volume are described. Some techniques described herein involve ascertaining a skeleton of a volume within a reservoir, and using the skeleton to map out a well topology to retrieve resources, such as hydrocarbons, from the volume. In one possible implementation, the skeleton can be found by generating a repulsive field throughout an interior of the volume, with the field decreasing with distance from the boundary of the volume. Interior points where a magnitude of the force drops to within a preset value are called critical points. The skeleton can be found by following outward flow from the volume from critical point to critical point.11-25-2010
20120179445Systems and Methods for Modeling Wellbore Trajectories - Systems and methods for modeling wellbore trajectories, which can be used to model corresponding drillstring trajectories and transform the torque-drag drill string model into a full stiff-string formulation.07-12-2012
20120179444SYSTEM AND METHOD FOR PERFORMING DOWNHOLE STIMULATION OPERATIONS - A system and method for performing stimulation operations at a wellsite having a subterranean formation with of a reservoir therein is provided. The method involves performing reservoir characterization to generate a mechanical earth model based on integrated petrophysical, geomechanical and geophysical data. The method also involves generating a stimulation plan by performing well planning, a staging design, a stimulation design and a production prediction based on the mechanical earth model. The stimulation design is optimized by repeating the well planning, staging design, stimulation design, and production prediction in a feedback loop until an optimized stimulation plan is generated.07-12-2012
20120179443DYNAMIC GRID REFINEMENT - A method for enhanced oil recovery, comprising selecting a target reservoir comprising hydrocarbons; inputting a plurality of parameters concerning the reservoir and the hydrocarbons into a simulator; and modeling an enhanced oil recovery technique with the simulator using dynamic local grid refinement to provide additional model resolution of a front between an enhanced oil recovery injectant and the hydrocarbons.07-12-2012
20100274547METHOD OF MODELLING A POROUS GEOLOGIC MEDIUM TRAVERSED BY A NETWORK OF FRACTURES - A method of modelling a fractured reservoir having application for petroleum reservoir development is disclosed utilizing a set of several families of equivalent blocks of regular shapes and sizes. The fractured reservoir is modelled by a complex porous medium made up of irregular blocks. A function defining the progress of an imbibition front within these blocks, whose derivative A′(X) is calculated, is determined. A function defining the progress of an imbibition front within regular equivalent blocks, whose derivative A′eq(X) is calculated, is then determined. This derivative, which constitutes at least two line segments with distinct slopes, depends on the dimensions of the equivalent blocks. Finally, the dimensions of the equivalent blocks are obtained by adjusting the two derivatives A′eq(X) and A′(X).10-28-2010
20100274546METHODS AND SYSTEMS OF PLANNING A PROCEDURE FOR CLEANING A WELLBORE - A method of planning a procedure for cleaning a wellbore by injecting a cleaning fluid from a reservoir into the wellbore includes detecting properties and conditions of fluids circulating between the reservoir and the wellbore; preparing a data set from the detected properties and conditions of the fluids circulating between the reservoir and the wellbore; simulating a cleaning operation model of injecting the cleaning fluid into the wellbore based on the data set; determining parameter settings of the simulated cleaning operation model that satisfy prescribed constraints; and producing the procedure for cleaning the wellbore based on the determined parameters. A system for conducting a procedure for cleaning a wellbore includes a sensor unit; a control unit; and a cleanup simulation system.10-28-2010
20100010796LOCATION OF BYPASSED HYDROCARBONS - A method of locating resources in a reservoir that includes at least one injection well and at least one production well includes mapping a modeled permeability characteristic of structures making up the reservoir, computing, based on the modeled permeability characteristic, an indicator of flow velocity for streamlines from each production well, computing, based on the modeled permeability characteristic, an indicator of flow velocity for streamlines from each injection well, and combining the indicators of flow velocity from each production and injection well to characterize a sweep efficiency of the reservoir system.01-14-2010
20120253770Method and System For Creating History Matched Simulation Models - A method for matching production history to flow simulations includes identifying a plurality of parameters that control an objective function measuring the mismatch between a flow simulation response in a parameter subspace and a production history. A value is calculated for an objective function and for a static measurement at each of a plurality of experiments in the parameter subspace. These results are used to develop a mathematical relationship between one or more static measurements and the objective function. During subsequent adjustment of the simulation model, a target window in the objective function is identified, and flow simulations are performed for each modified model that is predicted from the static geologic measurement to produce an objective function within the window. An objective function of each flow simulation to the production history is calculated and the procedure is iterated until the objective function is within a target range.10-04-2012
20110125476Probabilistic Simulation of Subterranean Fracture Propagation - Systems, methods, and instructions encoded in a computer-readable medium can perform operations related to stochastic simulation of subterranean fracture propagation. A plurality of subterranean formation models, each representing a subterranean formation, are analyzed to obtain information on predicted results of applying an injection treatment to the subterranean formation. Each of the analyzed subterranean formation models is generated by simulating forces acting on rock blocks of the subterranean formation during the injection treatment. Each simulation has an input parameter value determined for that simulation based on sampling a distribution of values for a characteristic of the subterranean formation. The characteristic may include, for example, a natural fracture parameter. The information on the predicted results of applying the injection treatment may include, for example, an output probability distribution. In some implementations, the information may be used to design an injection treatment for the subterranean formation.05-26-2011
20120232872MODELING HYDRAULIC FRACTURES - A method for modeling hydraulic fractures of a well. The method includes receiving a reservoir model that describes petrophysical properties of a subsurface of the earth near a reservoir. The method then receives one or more mechanical properties of the reservoir and generating a geomechanical model of the reservoir based on the reservoir model and the mechanical properties. After generating the geomechanical model of the reservoir, the method generates a three dimensional (3D) representation of the hydraulic fractures based on the geomechanical model and the reservoir model.09-13-2012
20120232873Systems and Methods for Improved Positioning of Pads - Systems and methods for the automated positioning of pads and orienting of slot templates for the pads. The systems and methods also include automated adjustment of well path plans from a pad to selected well targets.09-13-2012
20120232871METHOD FOR 3-D GRAVITY FORWARD MODELING AND INVERSION IN THE WAVENUMBER DOMAIN - A method for determining spatial distribution of a property within a volume of subsurface formations includes generating an initial model of spatial distribution of a property of the formations using available data related to the property distribution within the volume. A forward model is generated in the wavenumber domain of spatial distribution of a potential field. Measurements of a physical parameter having a potential field obtained at spaced apart locations above the volume and/or in at least one wellbore penetrating the volume are entered. A revised model of spatial distribution of the potential field is generated by interpolating the measurements of the parameter. The interpolating is performed in the wavenumber domain. A revised model of spatial distribution of the physical property is generated by inversion in the wavenumber domain of the revised potential field model.09-13-2012
20120265512UPDATING GEOLOGICAL FACIES MODELS USING THE ENSEMBLE KALMAN FILTER - The invention relates to a method for history matching a facies geostatistical model using the ensemble Kalman filter (EnKF) technique. The EnKF is not normally appropriate for discontinuous facies models such as multiple point simulation (MPS). In the method of the invention, an ensemble of realizations are generated and then uniform vectors on which those realizations are based are transformed to Gaussian vectors before applying the EnKF to the Gaussian vectors directly. The updated Gaussian vectors are then transformed back to uniform vectors which are used to update the realizations. The uniform vectors may be vectors on which the realizations are based directly; alternatively each realization may be based on a plurality of uniform vectors linearly combined with combination coefficients. In this case each realization is associated with a uniform vector made up from the combination coefficients, and the combination coefficient vector is then transformed to Gaussian and updated using EnKF.10-18-2012
20120239363PRODUCTION ESTIMATION IN SUBTERRANEAN FORMATIONS - A system has a tool capable of obtaining data that characterizes a stimulated reservoir or from which the stimulated reservoir can be characterized. The system also includes a processor capable of predicting the production of the stimulated reservoir using the characterizing data and outputting the predicted production. A reservoir may be stimulated using a stimulation process and data may be obtained that characterizes the stimulated reservoir or from which the stimulated reservoir can be characterized. The production of the stimulated reservoir may be predicted using the data. Alternatively, a reservoir may be stimulated using a stimulation process and data that characterizes the stimulated reservoir or from which the stimulated reservoir can be characterized may be obtained. One or more 3-D volumes may be produced based on the characterizing data, and inferences about the stimulated reservoir may be made using the one or more 3-D volumes.09-20-2012
20120323544RESERVOIR CALIBRATION PARAMETERIZATION METHOD - A method is described for producing an amended realization of a geostatistical model of a hydrocarbon reservoir using the Karhunen-Loève (KL) expansion. The KL expansion may be used to produce amended realizations for history matching and is widely used. However, it is necessary in order to use the KL expansion to perform singular value decomposition of the covariance matrix of the model to provide eigenvectors and eigen values for use in the expansion. In a typical geostatistical model, the covariance matrix is too large for singular value decomposition to be performed. Prior solutions to this problem involved reducing the resolution of the model so as to reduce the size of the covariance matrix. In the method described, a plurality of random realizations are generated and an approximation of the covariance matrix is constructed from the realizations, the approximation matrix having smaller dimensions than the true covariance matrix.12-20-2012
20110046934MONITORING A REGION OF INTEREST IN A SUBSURFACE FORMATION - A method of monitoring a subsurface formation (02-24-2011
20120271608DISCONTINUITY DETECTION - Implementations of discontinuity detection are described. In one possible embodiment, information associated with a computer-generated model is accessed. A location associated with a feature in the model can be reviewed for possible discontinuity properties by comparing an orientation associated with the location to an orientation of a true normal to the feature associated with a specific point nearby the location. In one possible aspect, if the orientation associated with the location and the true normal are within a given range of one another, the location can be flagged as a possible discontinuity in the feature.10-25-2012
20110213602Sand and Fluid Production and Injection Modeling Methods - Methods for modeling subsurface reservoirs are provided. In at least one embodiment, the process includes building a numerical model of a reservoir having at least one injection well and at least one producing well, and incorporating at least one of an Eulerian boundary condition (EBC) into each of the at least one injection well and at least one producing well, an advanced constitutive model (ACM) int the reservoir, and an adaptive re-meshing technique (ART) into the reservoir model. Then generating a simulation result from the integrated reservoir model, wherein the simulation result includes at least a volume of produced fluids and produced particulate solids from the reservoir, a volume of injected fluids and injected particulate solids into the reservoir, and a simulation of movement of at least a volume of particulate solids and fluids in the reservoir.09-01-2011
20110213600METHOD AND SYSTEM FOR USING MULTIPLE-POINT STATISTICS SIMULATION TO MODEL RESERVOIR PROPERTY TRENDS - A computer-implemented method and system for simulating reservoir property trends, including petrophysical trends within facies geobodies, is provided. One embodiment includes discretizing a range of values of the reservoir property to be modeled into at least two categories and utilizing the categories to discretize the associated well data and training image into categorical well data and a categorical training image. An embodiment includes applying MPS simulation using the categorical training image on a stratigraphic grid of nodes discretizing the reservoir volume to create a categorical property model. The embodiment additionally includes applying variogram-based simulation in each sub-region of the categorical property model to create a reservoir property model that reproduces the category histogram of each associated sub-region and models the reservoir property trends.09-01-2011
20120278053Method of Providing Flow Control Devices for a Production Wellbore - A method of providing a production string for a wellbore formed in a formation is disclosed. The method, in one embodiment may include: defining a performance criterion for flow of a fluid from a formation into a wellbore; performing a simulation using a processor, a simulation program, a parameter of the fluid, a parameter of the formation and a parameter of the wellbore to determine a first flow characteristic of the flow of the fluid from the formation into the wellbore corresponding to an initial set of flow control devices arranged in the wellbore; performing one or more additional simulations using the processor, the simulation program and the parameters of formation, fluid and wellbore to determine a new flow characteristic of the flow of the fluid from the formation into the wellbore for a new set of flow control devices until a new determined characteristic of the flow of the fluid from the formation into the wellbore meets the performance criterion; and storing results of simulation results relating to the flow control devices in a suitable storage medium.11-01-2012
20120330634SYSTEM AND METHOD FOR HYDROCARBON PRODUCTION FORECASTING - A system and method for hydrocarbon production forecasting which includes creating an integrated production model representative of at least two interconnected subsurface tanks, at least one well, and a surface network, wherein the surface network comprises multiple components including at least one pipeline; parameterizing a subsurface part of the integrated production model by using material balance to characterize the at least two interconnected subsurface tanks; parameterizing a well part of the integrated production model based in part on well geometry; parameterizing the surface network based on the multiple components of the surface network; combining the parameterized subsurface part, the parameterized well part and the parameterized surface network into an improved integrated production model; forecasting hydrocarbon production based on the improved integrated production model and displaying the input, output and intermediary products.12-27-2012
20110295580METHOD FOR OBTAINING CONSISTENT AND INTEGRATED PHYSICAL PROPERTIES OF POROUS MEDIA - A method and system for obtaining a consistent and integrated set of physical properties of a sample specimen of porous media, e.g., rock, in which a specimen is prepared for imaging. The specimen is imaged multiple times to yield a set of images that undergo a segmentation process to provide a digital representation of the sample specimen. The digital representation provides a view of the solid phase and pore space of the sample specimen. The digital representation may be used to determine a plurality of physical properties of the sample porous specimen, such that the sample porous specimen may remain intact throughout the method.12-01-2011
20110320182METHOD AND SYSTEM FOR DYNAMIC, THREE-DIMENSIONAL GEOLOGICAL INTERPRETATION AND MODELING - Techniques and a system for performing geological interpretation operations in support of energy resources exploration and production perform well log correlation operations for generating a set of graphical data describing the predetermined geological region. The process and system interpret the geological environment of the predetermined geological region from measured surface and fault data associated with the predetermined geological region. Allowing the user to query and filter graphical data representing the predetermined geological region, the method and system present manipulable three-dimensional geological interpretations of two-dimensional geological data relating to the predetermined geological region and provide displays of base map features associated with the predetermined geological region. The method and system automatically update the manipulable three-dimensional geological interpretations of two-dimensional data relating to the predetermined geological region, as well as calculate three-dimensional well log and seismic interpretations of geological data relating to the predetermined geological region.12-29-2011
20120290277SYSTEM AND METHOD FOR CHARACTERIZING RESERVOIR FORMATION EVALUATION UNCERTAINTY - A method is provided that utilizes independent data spatial bootstrap to quantitatively derive P10, P50 and P90 reservoir property logs and zonal averages. The method utilizes at least a “baseline” dataset that is assumed to be correct, and determines the distribution of possible input parameter values that provide the most optimal solution to fit the log analysis to the core data. In one embodiment, independent data spatial bootstrap method can be applied to determine the uncertainty of porosity and saturation.11-15-2012
20100185428METHOD AND SYSTEM FOR SIMULATING FLUID FLOW IN AN UNDERGROUND FORMATION WITH UNCERTAIN PROPERTIES - A method for simulating fluid flow in an underground reservoir formation with uncertain properties comprises: a) building an object oriented reservoir simulation model with embedded uncertainty descriptors for the uncertain properties; b) using the uncertainty descriptors to define probability distributions and parameterizations for data objects associated with the uncertain properties; c) providing each uncertainty descriptor with functionality to display a probability distribution to associated parameterized data objects to a user; and d) processing the reservoir simulation model in a reservoir flow simulator with a graphical user interface, which displays user selected uncertainty descriptors, parameterized data objects and/or resulting spread of reservoir flow simulation results.07-22-2010
20100198570System and method for predicting fluid flow in subterranean reservoirs - A reservoir prediction system and method are provided that use generalized EnKF using kernels, capable of representing non-Gaussian random fields characterized by multi-point geostatistics. The main drawback of the standard EnKF is that the Kalman update essentially results in a linear combination of the forecasted ensemble, and the EnKF only uses the covariance and cross-covariance between the random fields (to be updated) and observations, thereby only preserving two-point statistics. Kernel methods allow the creation of nonlinear generalizations of linear algorithms that can be exclusively written in terms of dot products. By deriving the EnKF in a high-dimensional feature space implicitly defined using kernels, both the Kalman gain and update equations are nonlinearized, thus providing a completely general nonlinear set of EnKF equations, the nonlinearity being controlled by the kernel. By choosing high order polynomial kernels, multi-point statistics and therefore geological realism of the updated random fields can be preserved. The method is applied to two non-limiting examples where permeability is updated using production data as observations, and is shown to better reproduce complex geology compared to the standard EnKF, while providing reasonable match to the production data.08-05-2010
20120150519ENHANCED OIL RECOVERY SCREENING MODEL - This invention relates to enhanced oil recovery methods to improve hydrocarbon reservoir production. An enhanced oil recovery screening model has been developed which consists of a set of correlations to estimate the oil recovery from miscible and immiscible gas/solvent injection (CO06-14-2012
20120150518Method and System For Coupling Reservoir and Surface Facility Simulations - A method, system and apparatus are disclosed for coupling independent reservoir and surface facility network simulators. A reservoir simulator is configured to simulate fluid flow in subterranean reservoirs and a surface facility network simulator is configured to simulate fluid flow in production equipment. Simulation of fluid flow in a subterranean reservoir is initiated using the reservoir simulator. Simulation of fluid flow in production equipment is initiated using the surface facility network simulator. The simulated fluid flow in the production equipment includes fluids produced from the subterranean reservoir. The simulation of fluid, flow in the subterranean reservoir is coupled with the simulation of fluid flow in the production equipment using, a sub-domain inflow performance relationship.06-14-2012
20130018642Hierarchical Modeling of Physical Systems and Their Uncertainties - A hierarchical modeling tool or process is provided that represents the fill range of behavior of a hydrocarbon system, accurately including uncertainties and potential events affecting the system. The potential events may include actions taken and information learned. The hierarchical modeling tool may be embedded within a decision support system or used in a stand-alone fashion. Disclosed aspects may link from accurate (high-detail) physics models to an accurate uncertainty representation, and then reduce the accurate uncertainty representation to a high-speed representation of both the physics model and the uncertainty that can be used in an optimizer.01-17-2013
20130024174Systems and Methods for Dynamically Developing Wellbore Plans With a Reservoir Simulator - Systems and methods for dynamically developing a wellbore plan with a reservoir simulator. The systems and methods develop a plan for multiple wellbores with a reservoir simulator based on actual and potential reservoir performance.01-24-2013
20130179136SYSTEM AND METHOD FOR SIMULTANEOUS VISUALIZATION OF FLUID FLOW WITHIN WELL COMPLETIONS AND A RESERVOIR - There is provided a system and method for creating a visualization representing location, type and fluid flow in a completion hardware configuration and the fluid flow in a reservoir containing the completion hardware configuration. An exemplary method comprises obtaining data relating to a location and type of the completion hardware configuration. The exemplary method comprises obtaining data relating to fluid flow within the completion hardware configuration based on the location and type of the completion hardware. Data relating to fluid flow within the reservoir is also obtained. The exemplary method also comprises importing the data relating to the location and type of the completion hardware configuration and the fluid flow within the completion hardware configuration into a main program. Data relating to fluid flow within the reservoir is also imported into the main program. The exemplary method comprises providing a visualization that includes the data relating to the location and type of the completion hardware configuration and the fluid flow within the completion hardware configuration, along with the data relating to fluid flow within the reservoir.07-11-2013
20130179137Reducing the Dimensionality of the Joint Inversion Problem - Method for reducing a 3D joint inversion of at least two different types of geophysical data acquired by 3-D surveys (07-11-2013
20130090906HIGH PERFORMANCE AND GRID COMPUTING WITH QUALITY OF SERVICE CONTROL - High performance computing (HPC) and grid computing processing for seismic and reservoir simulation are performed without impacting or losing processing time in case of failures. A Data Distribution Service (DDS) standard is implemented in High Performance Computing (HPC) and grid computing platforms, to avoid the shortcomings of current Message Passing Interface (MPI) communication between computing modules, and provide quality of service (QoS) for such applications. QoS properties of the processing can be controlled.04-11-2013
20130090907Method and System For Parallel Simulation Models - A method for modeling a hydrocarbon reservoir. A representation of a simulation model is generated in a non-transitory, computer readable medium. The simulation model is used to generate computational tasks. The tasks are allocated among a plurality of computational nodes. Each processing node of the plurality of computational nodes includes core processors and a shared memory accessible by the core processors. The reservoir simulation is executed on the plurality of computational nodes. During the reservoir simulation, if a first processing node in the plurality of computational nodes finishes executing its allocated tasks, a migration request is sent from the first processing node to another processing node in the plurality of computational nodes. The migration request is configured to request migration of a movable task from the other processing node to the first processing node. The movable task is migrated from the other processing node to the first processing node.04-11-2013
201300968964D SATURATION MODELING - Saturation models of subsurface reservoirs of interest are formed in a computer based on data from well logs, production data and core data. Data of these types obtained over a period of time are used to form 4-D Saturation models of a reservoir illustrative of fluid movement in the reservoir over time. The saturation models based on actual data are theft available for analysts to evaluate and display how gas and water have moved within the reservoir over time.04-18-2013
20130096897RESERVOIR MODELING WITH 4D SATURATION MODELS AND SIMULATION MODELS - Production based saturation models of subsurface reservoirs of interest are formed in a computer based on data from well logs, production data and core data. Data of these types obtained over a period of time are used to form 4-D actual or measured production based saturation models of a reservoir illustrative of fluid movement in the reservoir over time. Simulation models of fluid saturation of the reservoir are also formed for comparable times. Composite models of the production based saturation models and the simulation models are formed for analysts to evaluate accuracy of the simulation models of the reservoir taking into account production experience. The simulation models can then be adjusted for changes noted in the reservoir and based on how gas and water have actually moved within the reservoir over time.04-18-2013
20130096900Methods and Systems For Machine - Learning Based Simulation of Flow - There is provided a method for modeling a hydrocarbon reservoir that includes generating a reservoir model comprising a plurality of sub regions. At least one of the sub regions is simulated using a training simulation to obtain a set of training parameters comprising state variables and boundary conditions of the at least one sub region. A machine learning algorithm is used to approximate, based on the set of training parameters, an inverse operator of a matrix equation that provides a solution to fluid flow through a porous media. The hydrocarbon reservoir can be simulated using the inverse operator approximated for the at least one sub region. The method also includes generating a data representation of a physical hydrocarbon reservoir can be generated in a non-transitory, computer-readable, medium based, at least in part, on the results of the simulation.04-18-2013
20130096899Methods And Systems For Machine - Learning Based Simulation of Flow - There is provided a method for modeling a hydrocarbon reservoir that includes generating a reservoir model comprising a plurality of coarse grid cells. The method includes generating a fine grid model corresponding to one of the coarse grid cells and simulating the fine grid model using a training simulation to generate a set of training parameters comprising boundary conditions of the coarse grid cell. A machine learning algorithm may be used to generate, based on the set of training parameters, a coarse scale approximation of a phase permeability of the coarse grid cell. The hydrocarbon reservoir can be simulated using the coarse scale approximation of the effective phase permeability generated for the coarse grid cell. The method also includes generating a data representation of a physical hydrocarbon reservoir in a non-transitory, computer-readable, medium based at least in part on the results of the simulation.04-18-2013
20130096898Methods and Systems For Machine - Learning Based Simulation of Flow - There is provided a method for modeling a hydrocarbon reservoir that includes generating a reservoir model that has a plurality of sub regions. A solution surrogate is obtained for a sub region by searching a database of existing solution surrogates to obtain an approximate solution surrogate based on a comparison of physical, geometrical, or numerical parameters of the sub region with physical, geometrical, or numerical parameters associated with the existing surrogate solutions in the database. If an approximate solution surrogate does not exist in the database, the sub region is simulated using a training simulation to obtain a set of training parameters comprising state variables and boundary conditions of the sub region. A machine learning algorithm is used to obtain a new solution surrogate based on the set of training parameters. The hydrocarbon reservoir can be simulated using the solution surrogate obtained for the at least one sub region.04-18-2013
20130124178MULTISEGMENT FRACTURES - A method can include identifying a discrete natural fracture in a three-dimensional environment that includes a reservoir modeled by a three-dimensional grid model, representing the discrete natural fracture via a multisegment model in a two-dimensional region within the three-dimensional grid model, defining at least one connection for fluid communication between the multisegment model and the three-dimensional grid model, defining boundary conditions for the multisegment model, and solving the multisegment model subject to the at least one connection and the boundary conditions to provide values for fluid flow in the two-dimensional region. Various other apparatuses, systems, methods, etc., are also disclosed.05-16-2013
20130132055METHOD FOR OPTIMIZING THE DEVELOPMENT OF AN UNDERGROUND MEDIUM BY MEANS OF A RESERVOIR STUDY COMPRISING OPTIMIZED UPSCALING - A method for optimizing the development of a fluid reservoir by means of an accelerated reservoir study. A geological model is constructed. A reservoir model is then constructed by upscaling the geological model. The links between cells of the geological model and a cell of the reservoir model where they are contained are determined and stored. Flow simulations are carried out by computer-implemented reservoir simulator, the reservoir model and the links. The above stages are then repeated without repeating the link determination, by modifying parameters of the reservoir study to optimize the development scheme. Finally, the reservoir is developed according to this optimized development scheme.05-23-2013
20130144583HYPER-DIMENSIONAL SIMULATION FOR RESERVOIR ENGINEERING AND GEOSCIENCES - A hyper-dimensional simulator performs petroleum reservoir engineering and geosciences in a spatial volume operating environment. The entire spatial volume is ‘active’ for reservoir and geosciences applications. Although points in 3-D space are available for reservoir engineering and geosciences functions, it is conceptually easier to work with virtual, that is hyper dimensional surfaces and media. Limitations of single channel input using the mouse and/or keyboard imposed by prior art methods.06-06-2013
20100286972Volume Body Renderer - Irregular volumes within one or more three-dimensional volume datasets are identified and extracted in response to criteria. The processing involves automatically finding a seed voxel or seed cell that meets the criteria and thus belongs to an irregular volume of interest, and then identifying cells related to the seed cell by one or more predetermined relationships that are therefore also to be grouped into that irregular volume. Information, which can be of any suitable type, identifying each such cell as being related to other cells and belonging to an irregular volume is stored in a suitable data structure. The location or similar neighborhood information and other data describing properties or attributes of the identified cell are also stored. Because the irregular volumes are extracted and pre-processed in this manner, operations including rendering them on a display and performing Boolean and arithmetic operations on them can readily be performed.11-11-2010
20100286971Systems, Computer Implemented Methods, and Computer Readable Program Products to Compute Approximate Well Drainage Pressure for a Reservoir Simulator - Systems, computer implemented methods, and program products to determine approximate static well pressures for one or more arbitrary shaped wells by estimating the drainage volume of the one or more wells, are provided. The drainage volume of the one or more wells, for example, can be estimated from the one or more computed fluid flow flux vectors, and the approximate static well pressures for the one or more wells can be subsequently calculated by taking the pore volume average of the dynamic grid block pressures within the drainage volume of the one or more wells. The one or more fluid flow flux vectors can be calculated at each iteration in a numerical reservoir simulator as a part of standard simulator computations, negating a need for additional, extraneous computations to calculate effective drainage volume of the one or more wells.11-11-2010
20100318337METHOD, APPARATUS AND SYSTEM FOR MODELED CARBON SEQUESTRATION - Methods, systems and apparatuses are provided for facilitating sequestration of naturally occurring or anthropogenic carbon dioxide. The methods, systems and apparatuses of the present invention include a software interface for facilitating an exchange of data among associated simulators which simulate various steps of the carbon sequestration process.12-16-2010
20110313745Machine, Program Product, and Computer-Implemented Method to Simulate Reservoirs as 2.5D Unstructured Grids - Example embodiments utilize machines to model reservoir geometry having geological layers as 2.5D unstructured grids. Example embodiments include program products to simulate a reservoir by generating a reservoir data system, performing a numerical fluid flow simulation, and visualizing the simulation. Data system embodiments include data structures to model a reservoir geometry as laterally unstructured two-dimensional (2D) grids and associated layer depths defining z-lines to thereby define a 2.5D unstructured grid, including datasets for: vertices of the grid cells for the future grid top and bottom surfaces, a number and listing of vertices for each grid cell, cell center coordinates, and vertex adjacency information using a compressed sparse row format. Computer-implemented methods include projecting external and internal boundaries onto a future grid surface; generating 2D unstructured, e.g., Voronoi, grids, for the top and bottom surfaces; and generating z-lines of depths corresponding to reservoir layers to thereby generate 2.5D unstructured grids.12-22-2011
20110313744Production Simulator for Simulating a Mature Hydrocarbon Field - A production simulator (12-22-2011
20110313743Method of Improving the Production of a Mature Gas or Oil Field - A method of improving the production of a mature gas or oil field, the field comprising a plurality of existing wells, the method comprising the steps of providing a field simulator capable of predicting a production of the field in function of a given scenario, a scenario being a set of data comprising production parameters of the existing wells and, the case may be, location and production parameters of one or more new wells, determining drainage areas of the existing wells using the field simulator, determining locations of candidate new wells such that drainage areas of the candidate new wells, determined using the field simulator, do not overlap with the drainage areas of the existing wells, optimizing the value of a gain function which depends on the field production by determining a set of wells out of a plurality of sets of wells, which optimize the value of said gain function, each set of wells of said plurality of sets of wells comprising the existing wells and new wells selected among the candidate new wells.12-22-2011
20120029895MODEL-CONSISTENT STRUCTURAL RESTORATION FOR GEOMECHANICAL AND PETROLEUM SYSTEMS MODELING - A method for modeling a subterranean formation of a field, including receiving a structural model and restoring geological layers thereof to create boundary conditions each associated with a corresponding geological layer, and iteratively modeling each geological layer by alternatively applying a petroleum system model (PSM) and a geomechanical model (GMM) to a first geological layer while exchanging data between the PSM and GMM for convergence prior to applying the PSM and the GMM to a second geological layer.02-02-2012
20130197892METHOD AND SYSTEM OF PLOTTING CORRELATED DATA - Plotting correlated data. At least some of the illustrative embodiments are methods including: displaying on a display system of a computer system a two-dimensional plot of output data related to an earth formation, the output data estimated from a model of the earth formation, and the volume plotted relative to modeled time; placing a cursor shown on the display system over a first portion of the two-dimensional plot, the first portion corresponding to a first modeled time; and displaying on the display system a three-dimensional plot of respective values of a parameter from a plurality of cells of the model of the earth formation, the respective values at the first modeled time.08-01-2013

Patent applications in class Well or reservoir