Patent application number | Description | Published |
20080210420 | METHOD FOR IMPROVING THE DETERMINATION OF EARTH FORMATION PROPERTIES - Methods and apparatus for improving the determination of at least one multiphase flow parameter of an earth formation comprising propagating within the formation a first salinity front, determining a first value of the at least one multiphase flow parameter, propagating in the formation a second salinity front and improving the determination of the at least one multiphase flow parameter from the first value for the at least one multiphase flow parameter and a saturation profile associated with the first and second salinity fronts within the formation. | 09-04-2008 |
20080215242 | PETROPHYSICAL INTERPRETATION OF MULTIPASS ARRAY RESISTIVITY DATA OBTAINED WHILE DRILLING - Resistivity measurements at different radial depths of investigation obtained from multiple passes of a resistivity tool through a borehole are analyzed together to obtain indications of at least one of fractional flow, oil saturation, and water saturation in a formation. | 09-04-2008 |
20080319726 | SYSTEM 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 |
20090250208 | Tool And Method For Evaluating Fluid Dynamic Properties Of A Cement Annulus Surrounding A Casing - The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. The estimated permeability is useful in determining whether carbon dioxide can be effectively sequestered in the formation below or at the depth of measurement without significant leakage through the cement annulus. | 10-08-2009 |
20090250209 | METHOD AND TOOL FOR EVALUATING FLUID DYNAMIC PROPERTIES OF A CEMENT ANNULUS SURROUNDING A CASING - The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in hydraulic contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. By drilling into the cement and making additional measurements of the change of pressure in the probe over time, a radial profile of the cement permeability can be generated. | 10-08-2009 |
20090255669 | TOOL AND METHOD FOR DETERMINING FORMATION PARAMETER - An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume. | 10-15-2009 |
20100000737 | METHODS FOR DOWNHOLE SEQUESTRATION OF CARBON DIOXIDE - Carbon dioxide is sequestered in a formation using a dual completion and injection method that reduces or eliminates upward leak rates of the sequestered carbon dioxide. The dual completion and injection method involves the injection of a benign fluid such as brine (water) into a permeable layer of the formation located above the sequestration layer and which is separated form the sequestration layer by a nearly impermeable layer. The water is preferably injected at the same time the carbon dioxide is injected. | 01-07-2010 |
20100116511 | SYSTEMS AND METHODS FOR DOWNHOLE SEQUESTRATION OF CARBON DIOXIDE - Carbon dioxide is sequestered in a formation using dual or multiple completion and injection methods that reduce or eliminates upward leak rates of the sequestered carbon dioxide. The dual or multiple completion and injection method involves the injection of a benign fluid such as brine (water) into a permeable layer of the formation located above the sequestration layer and which is separated form the sequestration layer by a nearly impermeable layer. The water is injected at the same time the carbon dioxide is injected. | 05-13-2010 |
20100126717 | INSTRUMENTED FORMATION TESTER FOR INJECTING AND MONITORING OF FLUIDS - An example instrumented formation tester for injecting fluids and monitoring of fluids described herein includes a downhole tool which can be deployed in a wellbore via a wireline or a drill string. The downhole tool may facilitate the injection of fluids into an underground formation, and the monitoring of the directions in which the injected fluids flow in the formation in an open hole environment. In particular, the downhole tool may be configured for removing the mud cake from a portion of the wellbore wall for facilitating a fluid communication with the formation to be tested. | 05-27-2010 |
20100287123 | METHODS AND SYSTEMS FOR OPTIMIZING CARBON DIOXIDE SEQUESTRATION OPERATIONS - Methods and systems are provided for controlling operational parameters of a CO | 11-11-2010 |
20100299126 | METHOD FOR UNCERTAINTY QUANTIFIATION IN THE PERFORMANCE AND RISK ASSESSMENT OF A CARBON DIOXIDE STORAGE SITE | 11-25-2010 |
20100318337 | METHOD, 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 |
20110061863 | FLUID MONITORING AND FLOW CHARACTERIZATION - A wireline logging tool and method for fluid monitoring and flow characterization in individual zones of controlled salinity is disclosed. The tool and method advantageously facilitate zone-specific testing. Sets of packers are used to create hydraulically distinct zones proximate to the tool. Coiled tubing and isolation valves are used to selectively introduce and remove an electrically conductive fluid such as brine to and from a selected zone. Individual sensors are disposed near each zone to make zone-specific measurements while fluid properties are changed, e.g. while salinity is changed to cause salinity fronts in the formation. | 03-17-2011 |
20120024523 | TOOL AND METHOD FOR DETERMINING FORMATION PARAMETER - An apparatus and method of measuring a parameter characteristic of a rock formation in an oil well is provided with a device for generating a sensing field within a volume of the rock formation and a device for causing a flow through the volume in the presence of the sensing field, further including sensors responsive to changes in the volume, wherein a sensor response is indicative of the amounts of fluid, particularly hydrocarbon and water saturations and irreducible hydrocarbon and water saturations. Measurements can be made before the flow affects the measuring volume and after onset of the flow through the measuring volume. | 02-02-2012 |
20120273186 | FLUID MINOTIRING AND FLOW CHARACTERIZATION - A wireline logging tool and method for fluid monitoring and flow characterization in individual zones of controlled salinity is disclosed. The tool and method advantageously facilitate zone-specific testing. Sets of packers are used to create hydraulically distinct zones proximate to the tool. Coiled tubing and isolation valves are used to selectively introduce and remove an electrically conductive fluid such as brine to and from a selected zone. Individual sensors are disposed near each zone to make zone-specific measurements while fluid properties are changed, e.g., while salinity is changed to cause salinity fronts in the formation. | 11-01-2012 |
20120273194 | METHODS OF CALCULATING A FLUID COMPOSITION N A WELLBORE - The subject disclosure relates to methods for passively measuring a composition of a wellbore. | 11-01-2012 |
20120290208 | METHOD AND APPARATUS FOR MEASURING CARBON DIOXIDE DISSOLVED IN SOLUTION AND WELLBORE MONITORING SYSTEMS BASED THEREON - A sensing apparatus (and corresponding method) for monitoring carbon dioxide dissolved in a liquid solution employs a crystal surrounded in part by a sample chamber such that, in use, the liquid solution is in direct contact with the crystal. | 11-15-2012 |
20130025856 | DUAL OR TWIN-WELL COMPLETION WITH WETTABILITY ALTERATION FOR SEGREGATED OIL AND WATER PRODUCTION - A well completion and related method are provided for formations susceptible to simultaneous production of oil and water. In one embodiment, two closely spaced, preferably horizontal wellbores are drilled from a single well into the reservoir. The reservoir rock surrounding one leg (typically the upper leg) is chemically treated to make it hydrophobic, whereas the reservoir rock surrounding the other leg is chemically treated to make it hydrophilic. Separate production tubing and a dual completion is installed in order to enable independent flow from each leg. Drawdown pressures in both legs are controlled to be sufficiently close to each other such that only oil flows into one leg and only water into the other. The water produced is re-injected downhole or brought to the surface. | 01-31-2013 |
20130098604 | DETECTION AND QUANTIFICATION OF ISOLATION DEFECTS IN CEMENT - A method for evaluating wellbore integrity including introducing a drill to a surface of a casing encompassing an annulus, enclosing the drill in a housing hydraulically isolating the surface, drilling through the casing and into cement surrounding the casing, observing a pressure of the fluid, and using the pressure observation and a drill position to evaluate a presence of a defect and a location of the defect. Apparatus for evaluating wellbore integrity including a probe comprising a drill, wherein the probe is hydraulically isolated from the wellbore, a valve that encompasses the drill, a pressure gauge to measure the pressure of the fluid within the housing, a pressure gauge to measure the pressure in the system outside the housing, and equipment to compare the pressure measurements and the position of the drill and to evaluate a presence and a location of the defect. | 04-25-2013 |
20130110483 | METHOD FOR MEASUREMENT SCREENING UNDER RESERVOIR UNCERTAINTY | 05-02-2013 |
20130268202 | METHOD AND APPARATUS UTILIZING NUCLEAR MAGNETIC RESONANCE MEASUREMENTS FOR ESTIMATING RESIDUAL CARBON DIOXIDE SATURATION IN AQUIFERS - Percolation theory is applied to establish a connection between magnetization decay of nuclear magnetic resonance (NMR) measurements and residual carbon dioxide saturation (S | 10-10-2013 |
20130297273 | MODEL BASED INVERSION OF SEISMIC RESPONSE FOR DETERMINING FORMATION PROPERTIES - A method for characterizing a property of a subterranean formation including collecting well log and seismic data, inverting the data, processing for upscaled petrophysical parameters, constructing a flow model that generates saturation, pressure and temperature, constructing seismic velocity relationships from the results of the flow model, and constructing a seismic model. Some embodiments may form a full waveform model or a ray tracing model. Some embodiments may generate a velocity profile and/or waveforms using the profile. Some embodiments may use the parameters to form a reservoir model or to recover hydrocarbons from the formations. Some embodiments build a reservoir model of CO | 11-07-2013 |
20130304617 | METHOD OF VALUATION OF GEOLOGICAL ASSET OR INFORMATION RELATING THERETO IN THE PRESENCE OF UNCERTAINTIES - Methods are disclosed for assigning a value to a geological asset or information relating thereto in the presence of private and public sources of uncertainties. The private and public uncertainties associated with a geological asset or information associated therewith are defined, and private uncertainties are assigned a subjective probability representing the best state of knowledge currently available. A multi-dimensional valuation-time lattice is constructed using the subjective probabilities for the private uncertainties and using risk-neutral probabilities for the public uncertainties. A backward recursion through the multi-dimensional lattice is performed in order to generate a present value for the asset given the present information available. During the backward recursion, a tally of delta hedging coefficients is generated and stored in order to provide an operational “map” or “decision pathway” should the project move forward. | 11-14-2013 |
20140278110 | TARGETED SURVEY DESIGN UNDER UNCERTAINTY - A method, apparatus, and program product utilize global sensitivity analysis (GSA) based on variance decomposition to calculate and apportion the contributions to a total variance of a measurement signal from uncertain input parameters of a subsurface model in connection with designing targeted surveys. Through the use of global sensitivity analysis in this manner, the geometry for a survey may be determined based on a desired target of the design, e.g., based on spatial properties (e.g., reservoir zone of interest) and/or physical properties (e.g., porosity, fluid density, rock physics properties) to select locations (e.g., source-receiver pairs) with greater uncertainty contributions from parameter group(s) of interest. | 09-18-2014 |
20150047990 | CO2 CONCENTRATION MEASUREMENT IN DRY GAS MIXTURES - Described herein is an apparatus and methods for characterizing a fluid composition including exposing electrolyte to one fluid mixture, collecting a signal from an electrode in contact with the electrolyte, and simultaneously exposing the electrolyte to a second fluid, collecting a signal from a second electrode in contact with the electrolyte exposed to the second fluid, and comparing the signal difference between the electrodes with the Nerst equation wherein the temperature of the electrolyte is above 488° C. Carbon dioxide, nitrogen, and/or oxygen may be present in the fluid and/or the second fluid. | 02-19-2015 |