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| Number | Title | Issue Date |
| 7025534 | Marine seismic surveying A method of performing a seismic survey of a hydrocarbon reservoir in the earth formations beneath a body of water includes deploying a seismic cable from a drum carried by a remotely operated vehicle on the seabed. The cable is deployed into a lined trench, which i... | 04/11/2006 |
| 7021405 | Determining gradients using a multi-probed formation tester Methods for operating multi-probed formation testers to determine a fluid density gradient in the formation. The probes of the multi-probed formation tester are connected to a pressure gauge through a flowline that establishes a differential height between the probe... | 04/04/2006 |
| 7024021 | Method for performing stratigraphically-based seed detection in a 3-D seismic data volume The invention is a method for performing a stratigraphically-based seed detection in a 3-D seismic data volume. The method incorporates criteria that honor the layered nature of the subsurface so that the resulting seismic objects are stratigraphically reasonable. T... | 04/04/2006 |
| 7020558 | Method of measuring local similarities between several seismic trace cubes A Method of measuring local similarities between seismic trace cubes (3D survey) obtained from a volume of an underground zone, corresponding to prestack data or to repeated seismic surveys (4D survey). For each point of the volume considered, the method comprises a... | 03/28/2006 |
| 7013218 | System and method for interpreting repeated surfaces A method of managing a repeated surface comprising seismic data as one surface is disclosed where a plurality of horizons is analyzed and a determination made as to which of the plurality of horizons comprise a repeated surface. Those horizons which comprise the rep... | 03/14/2006 |
| 7013217 | System and method for determining formation slowness The invention provides techniques for calculating velocity from sonic signals with an improved signal to noise ratio, accuracy and certainty of result. Multichannel coherence measures are calculated from sonic transmitter signals and averaged to produce an average c... | 03/14/2006 |
| 7003402 | Method of processing data A method of processing data sequences obtained at substantially the same time at locations spatially separated from one another is disclosed. A sequence indicative of a measure of spread of the data sequences or of selected data sequences is determined. A common sig... | 02/21/2006 |
| 6999377 | Acquiring seismic data Methods and systems are provided for acquiring seismic data. Data are collected representing acoustic signals received from the Earth at distinct geographic locations. Data representing an ambient signal at the distinct geographic locations are also collected. For e... | 02/14/2006 |
| 6999879 | Method for controlling seismic coverage using decision theory A method of devising infill strategy in planning a seismic survey, using Monte Carlo methods and value-of-information theory to assess the probable value in well pay-out of a given increase in survey costs to reduce artifact degradation of the quality of the seismic... | 02/14/2006 |
| 6999880 | Source-independent full waveform inversion of seismic data A set of seismic trace data is collected in an input data set that is first Fourier transformed in its entirety into the frequency domain. A normalized wavefield is obtained for each trace of the input data set in the frequency domain. Normalization is done with res... | 02/14/2006 |
| 6996028 | Velocity analysis on seismic data A number of seismic stacks are precomputed (20) for known velocity fields. The velocity fields are chosen to span the range of velocities of interest. The stacks are then arranged (21) in the 3D memory of a graphics computer (10–14) using time... | 02/07/2006 |
| 6996471 | Adding a signal to seismic data The present invention provides a method and apparatus for analyzing seismic data. The method includes determining a portion of the seismic data recorded substantially before the arrival of a seismic signal and adding a test signal to the portion of the seismic data ... | 02/07/2006 |
| 6996470 | Systems and methods for geophysical imaging using amorphous computational processing Various systems and methods of the present invention provide amorphous computing systems and methods for use thereof. In some cases, the amorphous computing systems include one or more amorphous hardware elements that are programmed under control of a computer proce... | 02/07/2006 |
| 6993433 | Modeling gravity and tensor gravity data using poisson's equation for airborne, surface and borehole applications The present invention is a method for determining a parameter of interest of a region of interest of the earth. At least one component of potential fields data is measured at a plurality of locations over a region of interest including a subterranean formation of in... | 01/31/2006 |
| 6989841 | Visualization method for the analysis of prestack and poststack seismic data A method for presenting seismic data in a multidimensional visualization. Specifically, in the visualization technique of the current invention, seismic data is displayed in a multidimensional plan view utilizing at least four dimensions associated with the seismic ... | 01/24/2006 |
| 6985405 | Method for stable estimation of anisotropic parameters for P-wave prestack imaging A method is disclosed for determining interval anisotropic parameters. The method includes determining normal moveout (NMO) velocities and effective anelliptical parameters from seismic data traces. The NMO velocities are processed to obtain interval NMO velocities.... | 01/10/2006 |
| 6985815 | Instantaneous spectral analysis A method of seismic data processing is described in which a particular wavelet is selected from a plurality of wavelets as being most characteristic of a received seismic signal. A subtracted signal can be determined by subtracting a weighted signal of the particula... | 01/10/2006 |
| 6985816 | Methods and systems for determining the orientation of natural fractures Methods, systems, and articles of manufacture consistent with the present invention provide for determining the orientation of natural fractures in the Earth resulting from hydraulic fracturing treatment. Data attribute information from a far-field point-source sign... | 01/10/2006 |
| 6985404 | Method and apparatus of performing amplitude variation with offset analysis A method for performing amplitude variation with offset (AVO) analysis of a plurality of seismic data traces. The method includes fitting at least a two-term AVO equation to at least three seismic data traces having small angles of incidence using a curve fitting te... | 01/10/2006 |
| 6980482 | Seismic survey system A method of analyzing seismic survey data in which a transfer function for a geological model is derived by ray tracing techniques applied to theoretical data and the transfer function is applied to actual survey data in order to calculate reflection points (50 | 12/27/2005 |
| 6977866 | Method and process for prediction of subsurface fluid and rock pressures in the earth A method of determination of fluid pressures in a subsurface region of the earth uses seismic velocities and calibrations relating the seismic velocities to the effective stress on the subsurface sediments. The seismic velocities may be keyed to defined seismic hori... | 12/20/2005 |
| 6970788 | Method of keying a borehole in a seismic block The aim of the present invention is the determination of the best possible correlation (keying) for electric recordings obtained in a borehole with seismic recordings obtained in a volume of subsoil (the seismic block) containing the bore. This is accomplished by de... | 11/29/2005 |
| 6970397 | Determination of fluid properties of earth formations using stochastic inversion A method of determining a fluid property in a subsurface region of interest of an earth formation uses measurements of seismic attributes on seismic data. For a test region, a plurality of realizations of rock properties are specified, and for each of the realizatio... | 11/29/2005 |
| 6968274 | Use of cutting velocities for real time pore pressure and fracture gradient prediction Disclosed is a new method for providing accurate real time predictions of pore pressure and fracture gradient, at the rig site by determining the wave velocity from drill cuttings by a portable continuous wave technology (CWT) tool that measures drill cuttings at hi... | 11/22/2005 |
| 6967898 | Method of processing vertical seismic profile data using effective VTI models A method of applying an effective velocity model to vertical seismic profile (VSP) seismic data comprises correcting for offset using a non-hyperbolic effective velocity model so as to take account of the earth's layering and anisotropy. One preferred non-hyperbolic... | 11/22/2005 |
| 6965830 | System for estimating thickness of thin subsurface strata A system is disclosed for processing a group of spatially related seismic data traces in which seismic data windows extending over selected portions of said group of spatially related seismic data traces are defined, and a transform is applied to the successively se... | 11/15/2005 |
| 6965849 | Method of designing geophysical surveys A method for the design of VSP surveys for the purpose of imaging a reef in the formations surrounding the well in question. The basic steps include: building a geophysical model; defining receiver locations in the... | 11/15/2005 |
| 6963804 | Seismic data processing method to enhance fault and channel display A method of processing data of seismic traces for geophysical interpretation of the earth's subsurface includes the steps of determining a modified Hilbert transform of an input trace of data values to detect rapid and slow changes in the input trace with reduced se... | 11/08/2005 |
| 6961684 | Extensible framework for capturing feature information in a neutral format Flexible framework within a CAD application program is described that serves as a neutral format for feature information relating to modeling data for a solid body. The framework is hierarchical in nature to allow for ease of use and universal access to the design d... | 11/01/2005 |
| 6957146 | System for utilizing seismic data to estimate subsurface lithology A method of geophysical exploration of a subsurface region of interest which utilizes an unsupervised learning network to organize seismic data representing a subsurface region of interest. A portion of the organized seismic data is correlated with lithological data... | 10/18/2005 |
| 6957147 | Data management for seismic acquisition using variable compression ratio as a function of background noise A seismic data acquisition unit includes a data acquisition and digital circuit which receives an analog seismic signal and digitizes the signal. The digitized seismic data uses data telemetry and a repeater device to receive the compressed data and transmit the com... | 10/18/2005 |
| 6954725 | Multi-physics analysis method, method for setting analysis conditions therefor, and storage medium Disclosed is a method for setting analysis conditions for multi-physics analysis for analyzing an object model with a plurality of different types of physical simulation models. The method comprises the step of; setting the physical models for element groups constit... | 10/11/2005 |
| 6954403 | Concurrent phase angle graphic analysis Waveform data, such as reflection seismic data, is filtered by concurrently analyzing various phase angles of the data. The various phase angles of the data are compared to phase rotated background trends and the phase angle producing the maximum deviation from the ... | 10/11/2005 |
| 6954776 | Enabling intra-partition parallelism for partition-based operations Techniques are provided for increasing the degree of parallelism without incurring overhead costs associated with inter-nodal communication for performing parallel operations. One aspect of the invention is to distribute-phase partition-pairs of a parallel partition... | 10/11/2005 |
| 6954402 | Method of wave diagnostics of the oil-and-gas-deposit A method of diagnostics of oil-and-gas deposit for seismic survey on the basis of the complex of waves of the different types. It is performed by means of the insonification of the vicinity of the borehole by the seismic waves, the recording of the displacement vect... | 10/11/2005 |
| 6952649 | Petroleum exploration and prediction apparatus and method A method for predicting the state of a geological formation. The method may include generating a separation key effective to extract a first feature from a signal or signals corresponding to a first state and a second feature, distinct from the first feature, from a... | 10/04/2005 |
| 6950790 | Method of processing seismic data A method of processing seismic data using a seismic energy propagation model of the subsurface is disclosed. The method assigns seismic source, seismic receiver, and reflection point locations to the propagation model; identifies a plurality of alternative raypaths ... | 09/27/2005 |
| 6944094 | High resolution determination of seismic polar anisotropy A method and apparatus for high-resolution measurement of seismic anisotropy, comprising: a recording system, a borehole having an axis that is deviated from the vertical by a known acute angle; a housing that is adapted to travel within the borehole and that is in ... | 09/13/2005 |
| 6943709 | Self-adaptable data compression technique A self-adaptable data compression technique includes compressing the digital data points of a waveform according to at least a first protocol and a second protocol, and various comparing the compressed data under various protocols to determine which would require th... | 09/13/2005 |
| 6941204 | System and method for diagnosing aircraft components for maintenance purposes Aircraft maintenance and repair work is facilitated, especially for a commercial aircraft, by a diagnostic system and method, wherein an aircraft component or assembly of components is monitored by at least one sensor which produces and preferably also stores compon... | 09/06/2005 |
