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| Number | Title | Issue Date |
| 8447523 | High speed data transfer for measuring lithology and monitoring drilling operations A system for determining at least one of a lithology of a formation traversed by a borehole and an operational condition of a component of a drill string disposed in the borehole is disclosed. The system includes a drill string with a high speed wired pipe telemetry... | 05/21/2013 |
| 8437962 | Generating probabilistic information on subterranean fractures Systems, methods, and instructions encoded in a computer-readable medium can perform operations related to generating probabilistic information on characteristics of natural fractures of a subterranean formation. Fitted fracture models are generated based on microse... | 05/07/2013 |
| 8417457 | Borehole stress module and methods for use The disclosure is directed to methods and apparatuses for estimating a response relating to a formation by stressing a wall of a borehole during either wireline or while drilling deployment. The response may be estimated by stressing the wall of a borehole formed in... | 04/09/2013 |
| 8407007 | Anisotropic depth velocity model estimation above the receiver array in walkaway or 3D VSP data A walkaway VSP survey is carried out using a receiver array. Using a vertical VSP survey and arrival times of surface multiples on the walkaway VSP, vertical interval velocities and the anisotropy parameters δ and ε are estimated. This may then be used to process ... | 03/26/2013 |
| 8401796 | Methods and systems for acoustically monitoring formations Methods and systems for acoustically determining reservoir parameters of subterranean formations. A tool comprising a plurality of acoustic sources and configured for acoustic measurements is deployed within a wellhole. Acquired acoustic data are processed and utili... | 03/19/2013 |
| 8392120 | Method and tool for determination of fracture geometry in subterranean formations based on in-situ neutron activation analysis A method for determining fracture geometry of a subterranean formation from radiation emitted from a fracture in the formation, including measuring gamma-radiation emitted from the fracture; subtracting background radiation from the measured gamma-radiation to obtai... | 03/05/2013 |
| 8364406 | Multiple distributed sensors along a drillstring Systems and methods for downhole measurement and communications are disclosed. The system includes a communications medium, at least partially disposed in a drillpipe, a processor coupled to the communications medium, at least two sensor modules coupled to the commu... | 01/29/2013 |
| 8340912 | Seismic attributes for structural analysis Embodiments of methods and systems for analysis of geological structures using seismic attributes are described. In some embodiments, a method includes computing a similarity function using one or more seismic attributes at a location within the geological structure... | 12/25/2012 |
| 8332154 | Estimating reservoir properties from 4D seismic data Method for deriving a reservoir property change data volume from time shifts used to time-align 4D seismic survey data (31). The time alignment is performed on at least one angle stack of 4D data to determine a time-shift data volume (32). When multipl... | 12/11/2012 |
| 8321132 | Combining LWD measurements from different azimuths Apparatus, methods for forming the apparatus, and methods for operating the apparatus provide a value for a formation property or a borehole property from measurements obtained in a well. The value may be generated from determining a weighted average of the value fo... | 11/27/2012 |
| 8321131 | Radial density information from a Betatron density sonde An apparatus and a method for determining characteristics of earth formations traversed by a borehole that compensates the mudcake and standoff effects with fewer than usual detectors. The apparatus includes an radiation source effective to generate first and, spati... | 11/27/2012 |
| 8306751 | Testing additives for production enhancement treatments Fluid tests may be performed to determine suitability of an additive for a production enhancement treatment. In one aspect, a measuring device is used to determine a result of adding a sample of solid material to a test fluid that includes an additive. The result ma... | 11/06/2012 |
| 8301384 | Wellbore logging performance verification method and apparatus A method for correcting a measurement of a property of a subsurface material includes: selecting an instrument that includes a test circuit and a separate sensor, the test circuit configured for providing a standard for referencing to generate correction information... | 10/30/2012 |
| 8301382 | Continuous geomechanically stable wellbore trajectories A continuous geomechanically stable trajectory in a subterranean formation is found by calculating at least one reachable stable position relative to a starting position based on geological data indicative of characteristics of the subterranean formation, and iterat... | 10/30/2012 |
| 8301383 | Estimating in situ mechanical properties of sediments containing gas hydrates A method for constructing elastoplastic property correlations in multicomponent particulate systems. The method includes obtaining parameters from geophysical data of a sediment-hydrate system, where the parameters include shyd and pc, and wher... | 10/30/2012 |
| 8275550 | Method for target-oriented reverse time migration for prestack depth imaging A method and system for target-oriented reverse time migration for prestack depth imaging. One embodiment of the present invention includes determining an acquisition area within an earth model and also determining a reference surface near a target in the subsurface... | 09/25/2012 |
| 8255165 | Method for predicting differences in subsurface conditions A method for predicting differences in subsurface conditions useful in 4D applications. In an example embodiment of the method, at least one layer is defined in a data volume representing a first subsurface condition such as shale volume fraction (104). An ex... | 08/28/2012 |
| 8255164 | Methods and systems for borehole seismic Methods and systems for determining reservoir parameters of subterranean formations. A tool is configured or designed for deployment at at least one depth in a borehole traversing a subterranean formation. The tool comprises at least one sensor configured or designe... | 08/28/2012 |
| 8244473 | System and method for automated data analysis and parameter selection System and method for automatic analysis and determination of a parameter. Measurement data are obtained from one or more sensors deployed to measure a desired parameter, the data being associated to identified locations. The measured data are processed to parse out... | 08/14/2012 |
| 8234073 | System and method for estimating geological architecture of a geologic volume The geological architecture of a geologic volume of interest is estimated through the generation and/or selection of one or more numerical analog models of the geologic volume of interest that represent characteristics of the geologic volume of interest as a functio... | 07/31/2012 |
| 8214152 | Apparatus and method for predicting vertical stress fields A method of estimating at least one of stress and pore fluid pressure in an earth formation is disclosed. The method includes: discretizing a domain including at least a portion of the earth formation into a plurality of cells, each cell including a respective densi... | 07/03/2012 |
| 8175807 | Estimating horizontal stress from three-dimensional anisotropy A method for determining properties of a subterranean formation. The method includes determining at least one characterization parameter based on wave velocity measurement data, determining a plurality of elastic coefficients based on the at least one characterizati... | 05/08/2012 |
| 8145429 | System and method for sampling and analyzing downhole formation fluids A device for sampling fluid from an earth formation is disclosed. The device includes: an inlet port disposable in fluid communication with the fluid in a borehole; an injector including an injection chamber in fluid communication with the inlet port, the injector c... | 03/27/2012 |
| 8126648 | Method for predicting the best and worst in a set of non-unique solutions Method for determining best and worst cases for values of model parameters such as porosity and shale volume fraction generated by non-unique matrix inversion of physical data such as seismic reflection amplitudes. The matrix is diagonalized, and then orthonormal ba... | 02/28/2012 |
| 8126650 | Method for determining physical properties of structures Method for efficient inversion of controlled-source electromagnetic survey data to obtain a resistivity model of the subsurface of the survey area. The method extracts the dimensions and location of sub-surface structures as they may be revealed by existing seismic ... | 02/28/2012 |
| 8126649 | Methods for generating a distribution of optimal solutions to nondeterministic polynomial optimization problems The present invention provides methods for generating a distribution of optimal answers to a nondeterministic polynomial optimization problem by providing a plurality of solutions comprising input polynucleotides, wherein each solution comprises identical input poly... | 02/28/2012 |
| 8121789 | Method for correcting the phase of electromagnetic data Method for identifying, determining and correcting source-related phase errors in data from a controlled source electromagnetic survey by using data from ordinary survey receivers, i.e. without benefit of source monitoring data. Abrupt anomalies indicating source ma... | 02/21/2012 |
| 8121790 | Combining reservoir modeling with downhole sensors and inductive coupling A method is disclosed of characterizing a well using a series of measurements taken along the sandface of that well in order to optimize a well model. The method may comprise providing a well model with a plurality of adjustable physical parameters, providing a data... | 02/21/2012 |
| 8086408 | Method for positioning a wire using sensor information A method for positioning a wire having nodes and streamers is provided herein. The wire can be secured to tow lines secured to a floating vessel for detecting near surface geology formations. The method can use in-water sensors deployed proximate to the wire near th... | 12/27/2011 |
| 8082105 | Method and apparatus for measuring in-situ stress of rock using thermal crack Disclosed is a method and apparatus for measuring in-situ stress in rock using a thermal crack. The method involves forming a borehole, cooling a wall of the borehole, applying tensile thermal stress, forming a crack in the borehole wall, and measuring temperature a... | 12/20/2011 |
| 8078403 | Determining permeability using formation testing data A method, system and computer program product for determining permeability of an earth formation of a reservoir are disclosed. A method may include: providing formation testing data of the earth formation; defining layering of the earth formation; determining a geol... | 12/13/2011 |
| 8055448 | Imaging of formation structure ahead of the drill-bit A downhole acoustic logging tool is used for generating a guided borehole wave that propagates into the formation as a body wave, reflects from an interface and is converted back into a guided borehole wave. Guided borehole waves resulting from reflection of the bod... | 11/08/2011 |
| 8036830 | Resistivity imager in non-conductive mud for LWD and wireline applications An apparatus, method and computer-readable medium for imaging an earth formation. A downhole assembly having a resistivity sensor is conveyed in a borehole penetrating the earth formation. The resistivity sensor includes a plurality of antenna coils arranged along a... | 10/11/2011 |
| 8024124 | Determining maximum horizontal stress in an earth formation The invention relates to a method for determining maximum horizontal stress in an earth formation. The method includes obtaining fast shear wave velocities (Vs1) and slow shear wave velocities (Vs2) for various depths in the earth formation, ca... | 09/20/2011 |
| 8024123 | Subterranean formation properties prediction A method for predicting subterranean formation properties of a wellsite. The method includes obtaining seismic data for an area of interest, obtaining an initial seismic cube using the seismic data, and obtaining a shifted seismic cubes using the seismic data, where... | 09/20/2011 |
| 8024125 | Methods and apparatus to monitor contamination levels in a formation fluid Apparatus and methods to monitor contamination levels in a formation fluid are disclosed. An example method involves obtaining first property data indicative of a first fluid property of a formation fluid and second property data indicative of a second fluid propert... | 09/20/2011 |
| 8019548 | Enabling analysis of a survey source signal using a time-based visualization of the survey source signal To enable analysis of a signal associated with surveying a subterranean structure, a processing system receives a time series of the signal associated with surveying the subterranean structure. A visualization of the time series is generated, where the visualization... | 09/13/2011 |
| 8010291 | Processing measurement data that involves computing a derivative of the measurement data that represents a subterranean structure To process measurement data representing a subterranean structure, a derivative of the measurement data collected by at least one survey receiver is computed, with respect to frequency. A response representing the subterranean structure is then computed based on the... | 08/30/2011 |
| 7996154 | Methods and apparatus for analysis of downhole asphaltene gradients and applications thereof A method and system for characterizing asphaltene gradients of a reservoir of interest and analyzing properties of the reservoir of interest based upon such asphaltene gradients. The analysis employs a correlation that relates insoluble asphaltene concentration to s... | 08/09/2011 |
| 7996153 | Method and apparatus for formation testing A method includes calculating a correction factor that uses a tool component volume change model to estimate a system volume change resulting from a change in the tool component. An apparatus includes a carrier conveyable into a well borehole, a formation test tool ... | 08/09/2011 |
