Entries |
Document | Title | Date |
20080202747 | Methods of marking a zone of a wellbore for localizing the source of produced particulate - A method of localizing the source of a particulate produced with a fluid through a wellbore is provided, the method comprising the steps of: (A) providing marking composition comprising at least one marker that: (i) is capable of binding with a particulate; and (ii) has a detectable property distinguishable from the particulate; (B) introducing the marking composition: (i) through a wellbore; and (ii) into contact with at least a portion of a subterranean formation penetrated by the wellbore; (C) obtaining a fluid produced through the wellbore; and (D) analyzing a particulate produced with the produced fluid for the presence of the marker. | 08-28-2008 |
20080210421 | Tagged Propping Agents and Related Methods - A proppant composition comprises a non-radioactive, detectable tracer at least partially embedded in a ceramic composition. The composition may be prepared by agglomerating granules of the ceramic material and granules of the non-radioactive, detectable material to produce the particle by compression. Backflow of proppants in a fractured subterranean formation into which a plurality of particles of the proppant composition have been introducted may be tracked by analyzing a sample of the backflow by detecting for presence of the tracer in the sample. | 09-04-2008 |
20080230221 | METHODS AND SYSTEMS FOR MONITORING NEAR-WELLBORE AND FAR-FIELD RESERVOIR PROPERTIES USING FORMATION-EMBEDDED PRESSURE SENSORS - A method for measuring formation property includes obtaining a set of measurements indicative of wellbore pressures for a selected duration after a pressure perturbation is created in a wellbore; obtaining at least one additional set of measurements indicative of formation pressures for the selected duration after the pressure perturbation; and deriving the formation property based on the set of measurements indicative of the wellbore pressures and the at least one additional set of measurements indicative of formation pressures. A system for measuring formation property includes a first pressure sensor disposed proximate a wellbore for measuring pressures in the wellbore; a second pressure sensor disposed in a formation at a predetermined distance from the wellbore; and a flow rate measuring device. | 09-25-2008 |
20090107669 | WATERFLOODING ANALYSIS IN A SUBTERRANEAN FORMATION - A method of analyzing a subterranean formation. The method includes specifying a volume of interest in the subterranean formation, specifying an injector wellsite that penetrates the volume of interest, specifying a first producer wellsite and a second producer wellsite, each of which penetrates the volume of interest, calculating a first Injectivity-Productivity Index (IPI) for a first injector-producer wellsite pair which includes the injector wellsite and the first producer wellsite, calculating a second IPI for a second injector-producer wellsite pair which includes the injector wellsite and the second producer wellsite, determining whether the first IPI is substantially equal to the second IPI to obtain an analysis result, and adjusting a wellsite operation based on the analysis result. | 04-30-2009 |
20090151938 | STIMULATION THROUGH FRACTURING WHILE DRILLING - A method for preparing a formation surrounding a wellbore to bear hydrocarbons through a borehole is disclosed. In one step, a bottomhole assembly is inserted into the borehole. The formation is drilled with the bottomhole assembly. The formation may be characterized with logging tools, probes, sensors, seismic system and/or the like to create first information. One or more fractures are placed in the formation without removal of the bottomhole assembly from the wellbore. Further, continuous drilling of the formation is performed with the bottomhole assembly after/during placing the fractures. Further characterizing of the formation with the probes, sensors/systems or the like is performed to produce second information. Another fracture is placed with feedback from the second information. Repeating the drilling, characterizing and placing of fractures as necessary during the formation preparing process. | 06-18-2009 |
20090159276 | Methods and Apparatus for Communicating Across Casing - A system for passing an electromagnetic signal through a casing comprises a tool body that can be positioned inside the casing; means for magnetically saturating the casing in the vicinity of the tool; a transmitter for transmitting an electromagnetic signal from the tool antenna to the outside of the casing for reception at one or more sensors equipped with an antenna and electronic circuits located outside the casing; and a detector for detecting an electromagnetic signal at the tool from the sensor located outside the casing. | 06-25-2009 |
20090166035 | Borehole Imaging and Orientation of Downhole Tools - Methods of generating radial survey images of a borehole and methods of orienting downhole operational tools are disclosed. The disclosed techniques are used to generate a radial survey of the borehole in the form of one or more rose-plots and/or a radial image of the borehole and surrounding area that can be used to properly orient downhole operational tools in the desired direction. The tool string includes, from the top to bottom, a telemetry module, a non-rotating centralizer, a motor module, an imaging sonde used to survey the borehole, a rotating centralizer and a downhole operational tool. The motor module can be used to rotate the imaging sonde to generate the radial survey and then rotate the downhole operational tool to the desired direction based upon a review of the radial survey. | 07-02-2009 |
20100000729 | METHOD TO DETECT CASING POINT IN A WELL FROM RESISTIVITY AHEAD OF THE BIT - Methods are described using resistivity measurements obtained while drilling one or more offset wells using a drilling mud to guide drilling of one or more uncased intervals of a well to identify a casing point or points in the uncased intervals of the well. Resistivity data is gathered during drilling the offset well and prior to penetrating a region of interest of a known subterranean formation. The drill string in the uncased interval of the well progresses toward the region of interest, using resistivity data at similar depths to identify a casing point while the drill bit advances toward but does not penetrate the region. In certain embodiments resistivity may also be obtained in front of the drill bit in the uncased interval of the well and used in conjunction with the offset well resistivity data to identify casing points in the uncased intervals of the well. | 01-07-2010 |
20100096125 | ACTIVE SEISMIC MONITORING OF FRACTURING OPERATIONS - A method for managing a fracturing operation. In one implementation, the method may include positioning a seismic source and at least one seismic receiver near a hydrocarbon reservoir; pumping a fracturing fluid into a well bore of the hydrocarbon reservoir; performing a seismic survey with the seismic source and the at least one seismic receiver during the fracturing operation; and identifying locations of the fracturing fluid within subsurface formations in which the hydrocarbon reservoir is located. | 04-22-2010 |
20100163224 | Downhole Tool Delivery System - An apparatus for use in deployment of downhole tools is disclosed. Preferably, the apparatus includes at least an in-ground well casing, a housing providing a hermetically sealed electronics compartment, a tool attachment portion, and a first flow through core. The housing is preferably configured for sliding communication with the well casing. The hermetically sealed electronics compartment secures a processor and a location sensing system, which communicates with the processor while interacting exclusively with features of the well casing to determine the location of the housing within the well casing. A preferred embodiment further includes a well plug affixed to the tool attachment portion, the well plug includes a second flow through core capped with a core plug with a core plug release mechanism, which upon activation provides separation between the second flow through core and the core plug, allowing material to flow through said first and second flow through cores. | 07-01-2010 |
20110132601 | MULTI-ZONE FORMATION EVALUATION SYSTEMS AND METHODS - A formation evaluation system and method. A formation evaluation system includes an assembly interconnected as part of a tubular string and displaceable to multiple positions proximate each of multiple zones intersected by a wellbore. The assembly includes at least one formation evaluation instrument for determining a characteristic of formation fluid, and a pump which draws the fluid into the assembly. A method of evaluating multiple subterranean zones during a single trip into a wellbore includes the steps of: interconnecting a formation evaluation assembly in a coiled tubing string; for each of the multiple zones, displacing the formation evaluation assembly to a position proximate the respective zone, receiving formation fluid from the respective zone into the formation evaluation assembly, and determining at least one characteristic of the formation fluid; and performing the multiple displacing, receiving and determining steps during the single trip of the coiled tubing string into the wellbore. | 06-09-2011 |
20110139446 | Method of Determining Queried Fluid Cuts Along a Tubular - A method of identifying a queried fluid cut along a tubular includes, determining a first flow rate of a queried fluid flowing through all open zones, determining a flow rate of liquid through a selected zone, and closing the selected zone, determining a second flow rate of the queried fluid flowing through all open zones, and attributing a queried fluid cut to the selected zone as a percentage that the difference between the first flow rate of the queried fluid and the second flow rate of the queried fluid is of the flow rate of liquid through the selected zone. | 06-16-2011 |
20110220350 | IDENTIFICATION OF LOST CIRCULATION ZONES - Method and apparatus for identifying lost circulation in subterranean wells, in particular, methods for treating the identified lost circulation zones with fluid compositions that are pumped into a wellbore enter voids in the subterranean-well formation through which wellbore fluids escape, and form a seal that limits further egress of wellbore fluid into the lost-circulation zone. | 09-15-2011 |
20120024524 | Method for Monitoring Oil Field Development - The invention relates to the oil industry, in particular to methods for monitoring the development of oil fields. In order to increase the monitoring efficiency of the oil field development by the fuller recording of parameters that characterize a deposit to be developed, for hydraulically unrelated areas with equal values of desirability functions, the method involves additionally measuring the stability of a water-oil emulsion in each well, calculating the mean value of the water-oil emulsion within each area and advising the use of methods for increasing oil recovery at the areas according to the incrementation of the water-oil emulsion value. | 02-02-2012 |
20120325465 | ESTIMATING DRILL CUTTING ORIGINATION DEPTH USING MARKING AGENTS - A method for estimating a depth from which cuttings have been recovered from a well may include varying a parameter of one or more marking agents added into a drilling fluid circulated into the well and recovering the cuttings from the well. The depth may be estimated by estimating a value associated with the marking agent that marks the cuttings. A system for estimating a depth from which cuttings have been recovered from a well includes at least one marking agent configured to mark the cuttings and a marking agent dispensing device configured to add the at least one marking agent into a drilling fluid circulated into the well. The marking agent dispensing device may be further configured to vary a parameter of the at least one marking agent. | 12-27-2012 |
20130153216 | Recovery From A Hydrocarbon Reservoir - A method and systems for improving recovery from a hydrocarbon reservoir are described. A method includes identifying an interval within the reservoir that comprises a reduced reservoir quality, wherein the interval includes hydrocarbons. A production chamber is formed in a reservoir interval below the interval of reduced reservoir quality, wherein the production chamber is in contact with the interval of reduced reservoir quality. Hydrocarbons are mobilized in the interval of reduced reservoir quality by contact with a mobilizing agent and a pressure is changed within the interval of reduced reservoir quality to allow hydrocarbon flow from the interval of reduced reservoir quality. | 06-20-2013 |
20130292112 | COMPOSITION AND METHOD FOR LOCATING PRODUCTIVE ROCK FRACTURES FOR FLUID FLOW - A particle mixture useful for estimating the locations of rock fractures in rock includes a mixture of particles of proppant with particles of an energetic material having a size, shape, and density that are about the same as for the particles of proppant. Particles of proppant and of an energetic material having the same desired sizes and shapes of the proppant may be obtained by collecting those particles that pass through a sieve of a chosen size but not through a sieve of the next smaller size. The location of rock fractures that contain proppant can be estimated by sending the particle mixture into fractured rock, allowing the energetic particles to release their energy, and afterward estimating the locations in the rock where the energy was released from the particles, thereby providing the locations of fractures in the rock that contain proppant. | 11-07-2013 |
20140338898 | ELECTRICALLY CONDUCTIVE PROPPANT COATING AND RELATED METHODS - An electrically conductive proppant coating and a method for applying the coating to the proppant, whereby the coated electrically conductive proppant can determine formation characteristics, such as dimensions, orientation, and conductivity. | 11-20-2014 |
20140352956 | PRODUCTION SYSTEM FOR PRODUCING HYDROCARBONS FROM A WELL - The present invention relates to a production system ( | 12-04-2014 |
20140374091 | Electromagnetic Imaging Of Proppant In Induced Fractures - A method may include forming a borehole in a subterranean formation, lining at least part of the borehole with an electrically conductive casing, and injecting a fracturing fluid, a proppant, and a sensing additive into the borehole to form a propped fracture pattern. The method may further include driving the electrically conductive casing so that the sensing additive generates an electromagnetic (EM) field, sensing the EM field, and mapping the propped fracture pattern based upon the sensed EM field. | 12-25-2014 |
20150013974 | FRACTURE EVALUATION THROUGH CASED BOREHOLES - A method of estimating fractures in an earth formation includes: disposing an acoustic tool in a cased borehole in an earth formation, the acoustic tool including a multipole acoustic transmitter and an acoustic receiver; transmitting an acoustic signal into the borehole; measuring deep shear wave (DSW) signals generated from shear body waves reflected in the formation in a far-field region of the formation around the borehole; and estimating at least a location and an orientation of a fracture in the formation based on the DSW signals. | 01-15-2015 |
20150041123 | Fluid Stimulation of Long Well Intervals - Systems and methods for accessing and/or harvesting hydrocarbons from a wellbore. A method may include modeling a well to determine a length of a stimulation zone in the production interval, wherein the model is based, at least in part, on a reaction time for a stimulation process. Packers are placed in the well to fluidically isolate the stimulation zone from other zones in the well. The targeted zone is stimulated, such as by acid treatment. Hydrocarbons may be recovered from the stimulation zone. | 02-12-2015 |
20150047836 | COMBINATION POWER SOURCE FOR A MAGNETIC RANGING SYSTEM - According to aspects of the present disclosure, a magnetic ranging system is described herein. The magnetic ranging system may comprise a downhole apparatus tool ( | 02-19-2015 |
20150060060 | Systems and Methods for Optimal Positioning of Drilling Pads - Systems and methods for optimal positioning of drilling pads for horizontal well field development considering the location and spacing of each horizontal well, boundaries and surface/subsurface hazards. | 03-05-2015 |
20150068740 | COAXIAL GROUND HEAT EXCHANGER AND METHOD FOR INSTALLING SAID GROUND HEAT EXCHANGER IN THE GROUND - A coaxial ground heat exchanger and installation method are disclosed where the heat exchanger has a central core tube that can be provided with a thermally insulating casing and an outer tube that delimits an annular gap which extends radially outwards from the core tube. The core tube and the annular gap can be configured such that a flowable heat transfer medium can flow through. The outer tube is formed by a tubular expandable cover that directly adjoins a wall of a ground heat exchanger borehole when the heat exchanger is installed. | 03-12-2015 |
20150075787 | METHOD FOR DETERMINING REGIONS FOR STIMULATION ALONG A WELLBORE WITHIN A HYDROCARBON FORMATION, AND USING SUCH METHOD TO IMPROVE HYDROCARBON RECOVERY FROM THE RESERVOIR - A method for determining along a length of a wellbore situated in an underground hydrocarbon-containing formation, regions within the formation where injection of a fluid at a pressure above formation dilation pressure may be advantageous in stimulating production of oil into the wellbore. An initial information-gathering procedure is conducted prior to formation dilation/fracturing, wherein fluid is supplied under a pressure less than formation dilation or fracture pressure, to discrete intervals along the wellbore, and sensors measure and data is recorded regarding the ease of penetration of such fluid into the various regions of the formation. Regions of the formation exhibiting poor ease of fluid penetration or regions of higher oil saturation, are thereafter selected for subsequent stimulation or dilation, at pressures above formation dilation pressures. Where initial fluid pressures and/or formation dilation pressures are provided in cyclic pulses, as novel downhole tool is disclosed for such purpose. | 03-19-2015 |
20150083409 | ROTATIONALLY-INDEPENDENT WELLBORE RANGING - In one example of a rotationally independent wellbore ranging system, a housing attached to a rotary component is positioned in a first wellbore and remains substantially stationary relative to the first wellbore when the rotary component rotates in the first wellbore. Multiple sensors affixed to the housing are operable to receive multiple ranging signals from a second wellbore while the rotary component rotates in the first wellbore, and provide the multiple ranging signals to a processor to determine a position of the first wellbore relative to the second wellbore. | 03-26-2015 |
20150096747 | DETERMINING THE DEPTH AND ORIENTATION OF A FEATURE IN A WELLBORE - The invention relates to a device for determining the depth and orientation of a feature in a wellbore, and to a corresponding method. It also relates to a downhole apparatus for performing an operation in a well comprising a device for determining the depth and orientation of a feature in a wellbore and a device for performing the operation. In an embodiment, a downhole device ( | 04-09-2015 |
20150292294 | Apparatus and Method for Isolating Fluid Flow in an Open Hole Completion - A zonal isolation apparatus for an open-hole wellbore completed with a gravel pack having sections of blank pipe intermediate selected sections of sand screen, comprising a blank liner, with a first packer and second packer disposed therein. The first and second packers are set adjacent to sections of blank pipe and seal an annular area formed between the blank liner and the surrounding sections of sand screen at the first and second sections of blank pipe. The flow of fluids into the wellbore intermediate the first and second sections of blank pipe is inhibited. | 10-15-2015 |
20150354330 | IN SITU HYDROCARBON RECOVERY USING DISTRIBUTED FLOW CONTROL DEVICES FOR ENHANCING TEMPERATURE CONFORMANCE - Hydrocarbon recovery can involve operating flow control devices distributed along a horizontal well based on temperatures of hydrocarbon-containing fluids at a plurality of locations along the horizontal well. The temperatures of hydrocarbon-containing fluids can indicate a presence of a hotter overlying reservoir region and an adjacent colder overlying reservoir region. The operation of the distributed flow control devices can involve reducing flow of hydrocarbon-containing fluid from the hotter overlying reservoir region into the horizontal well, while providing fluid communication and pressure differential between the colder overlying reservoir region and the production well, sufficiently to cause hot fluids surrounding the colder overlying reservoir region to be drawn into and induce heating of the colder overlying reservoir region. | 12-10-2015 |
20160017702 | RADAR IMAGING OF BOREHOLES - A method of estimating a characteristic of a formation includes: disposing a radar imaging tool in a borehole; generating a high frequency radar signal by a radar transmitter, the high frequency radar signal having a frequency configured to limit penetration of the radar signal to a near-borehole region of the formation, the near-borehole region including a surface of the borehole and a region of the borehole proximate to the surface; detecting return signals reflected from the near-borehole region; generating an image of the near-borehole region based on the return signals; and estimating a characteristic of the formation based on the image. | 01-21-2016 |
20160047231 | GAS WELL INFLOW DETECTION METHOD - A method for detecting or mapping potential influx zones for gas from a geological formation to a gas well with a well head with a valve tree or a choke includes the following steps of:—marking the potential influx zones with tracer systems with corresponding unique tracers—filling the gas well form the surface, through the well head with liquid wherein the tracers have affinity to the liquid,—producing liquid form the well,—consecutively sampling samples from the produced liquid,—to analyze the samples to prove possible presence of one or more tracers or even measure the tracers concentrations. [for then proving possible influx of a back flow of liquid from the influx zones one assume implies the gas pressure and the inflow of a gas form the influx zones]. | 02-18-2016 |
20160069171 | IN SITU GRAVITY DRAINAGE SYSTEM AND METHOD FOR EXTRACTING BITUMEN FROM ALTERNATIVE PAY REGIONS - A system and method are provided for recovering bitumen from a bitumen reserve. The method includes recovering bitumen from an alternative pay region in the bitumen reserve via gravity drainage using an inclined horizontally drilled well drilled from a drainage pit upwardly into the bitumen reserve. The drainage pit has been excavated into an area of an underlying formation that is, at least in part, adjacent to and underlying the bitumen reserve. The alternative pay region includes a region unsuitable for recovering bitumen by surface mining or by in situ recovery using wells that produce bitumen to ground level above the alternative pay region. | 03-10-2016 |
20160108722 | AUTONOMOUS UNTETHERED WELL OBJECT HAVING AN AXIAL THROUGH-HOLE - An apparatus that is usable with a well includes a body, a blocking member, a sensor, a radially expandable element and a controller. The body includes a longitudinal passageway that extends through the body, and the blocking member is disposed in the passageway to check fluid from flowing in a predefined direction through the passageway. The sensor is disposed on the body to sense a property of an environment of the string as the object is being communicated through the passageway; the radially expandable element is disposed on the body; and the controller is disposed on the body to selectively autonomously control the expandable element to land the body in a downhole restriction in response to the sensing. | 04-21-2016 |
20160115785 | Oil and Gas Fracture Liquid Tracing with Oligonucleotides - Methods of tracing fracking liquid in oil or gas bearing formations using plural unique oligonucleotide markers. Method includes pumping the plural volumes of fracking liquid, each marked with a unique oligonucleotide, into the formation, thereby defining plural fracture zones in the formation, and, pumping fluids out of the formation while taking plural fluid samples. Then, analyzing the concentration of the unique oligonucleotides in each of the plural fluid samples, and, calculating the ratio of each of the plural volumes of fracking liquid recovered for each of the plural fluid samples according to the concentration of the unique oligonucleotides present in each of the plural samples. And, then, establishing the quantity of the plural volumes of fracking liquids removed from the plural fracture zones. | 04-28-2016 |
20160130912 | Method and Apparatus for Secondary Recovery Operations in Hydrocarbon Formations - A production casing string including a plurality of propellant sleeves positioned on an exterior of the production casing string, and each propellant sleeve includes a firing mechanism and a firing sleeve for selectively covering and uncovering the firing mechanism. The casing string also includes an identifiable marker associated with each propellant sleeve and at least one selective bi-directional valve assembly associated with each propellant sleeve. | 05-12-2016 |
20160160582 | Well Servicing Vehicle With Method for Detecting Well String Snags - Example well servicing vehicles for removing and installing well strings (e.g., sucker rods and tubing) within wellbores provides a method for determining and logging snag points within the wellbore. In some examples, snag points are determined based on a predetermined change in cable tension, crown load strain and/or hydraulic pressure. The predetermined change is adjusted based on the current length of the well string at the time the snag occurs. | 06-09-2016 |
20160186530 | METHOD FOR IN-WELLBORE WELDING - A method for welding within a tubular member situated in a hydrocarbon wellbore. Downhole junctions for branch wellbores can be welded, casing windows for sidetrack drilling can be prepared, and casing repairs can be undertaken. | 06-30-2016 |
20180023350 | METHOD FOR PREVENTING FORMATION OF A SLUG FLOW REGIME OF A GAS-LIQUID MIXTURE IN A NON-LINEAR WELLBORE OR PIPELINE | 01-25-2018 |