Filtering Or Noise Reduction/removal Patents (Class 702/17)
  • Publication number: 20130253838
    Abstract: A system and method for determining a 4D difference from 4D seismic data including receiving a baseline seismic dataset and a monitor seismic dataset; identifying a 4D signal present in the monitor seismic dataset to create a 4D monitor dataset and a signal in the baseline seismic dataset which matches the monitor seismic dataset to create a baseline matching signal dataset; differencing the baseline matching signal dataset and the baseline seismic dataset to create a 4D baseline dataset; and differencing the 4D baseline dataset and the 4D monitor dataset to create a 4D difference dataset. In an embodiment, a multi-scale, multi-directional transform is used to identify the 4D signal present in the monitor seismic dataset and the signal in the baseline seismic dataset which matches the monitor seismic dataset.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 26, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: Sandra Tegtmeier-Last, Gilles Hennenfent
  • Publication number: 20130245956
    Abstract: A method for improving seismic images by correction of distortions in the underlying seismic data caused by a near-surface anomaly that produces a non-hyperbolic move-out component of the seismic reflection below the anomaly includes the steps of: a. redatuming the input seismic data to go from the surface to a target horizon using true one-way traveltime operators to provide a first new redatuming dataset; b. redatuming the input seismic data using hyperbolic one-way travel time operators to provide a second new redatuming dataset; and c. redatuming the combination of a first causal part of the first new redatuming dataset and an anti-causal second part of the second redatuming dataset to go from the target horizon back to the surface using hyperbolic one-way traveltime operators to provide a dataset that is referenced to the surface without an imprint of the anomaly.
    Type: Application
    Filed: November 4, 2011
    Publication date: September 19, 2013
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Ali Ameen Al-Momin, Yi Luo, Tong W. Fei
  • Publication number: 20130238248
    Abstract: Methods and apparatus for waveform processing are disclosed. An example method includes determining shrinkage estimators in a Discrete Radon transform domain based on semblance of waveform data and de-noising the waveform data using a processor and the shrinkage estimators to enable the identification of weak signals in the waveform data.
    Type: Application
    Filed: December 13, 2012
    Publication date: September 12, 2013
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Shuchin Aeron, Sandip Bose, Henri-Pierre Valero
  • Patent number: 8530828
    Abstract: A plurality of scans of a sample are performed, producing a plurality of mass spectra. Neighboring mass spectra of the plurality of mass spectra are combined into a collection of mass spectra based on sample location, time, or mass. A background noise estimate is calculated for the collection of mass spectra. The collection of mass spectra is filtered using the background noise estimate, producing a filtered collection of one or more mass spectra. Quantitative or qualitative analysis is performed using the filtered collection of one or more mass spectra. The background noise estimate is calculated by dividing the collection of mass spectra into two or more windows, for example. For each window of the two or more windows, all spectra within each window are combined, producing a combined spectrum for each of the two or more windows. For each combined spectrum, a background noise is estimated.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: September 10, 2013
    Assignee: DH Technologies Development Pte. Ltd.
    Inventors: Gordana Ivosev, Ronald Bonner
  • Publication number: 20130226463
    Abstract: Computational systems and methods for deghosting marine seismic streamer data using cost-functional minimization are disclosed. In one aspect, the method computationally transforms recorded wavefield data from the space-time domain to a wavenumber-frequency domain and computationally deghosts the wavefield data in the wavenumber-frequency domain. The deghosted wavefield data may then computationally transformed from the wavenumber-frequency domain back to the space-time domain and stored. The computational methods include iterative minimization of a cost functional in the wavenumber-frequency domain.
    Type: Application
    Filed: February 28, 2012
    Publication date: August 29, 2013
    Applicant: PGS Geophysical AS
    Inventors: Roald van Borselen, Peter M. van dan Berg, Jacob T. Fokkema
  • Publication number: 20130226462
    Abstract: Disclosed are methods and apparatus for noise removal from seismic data. In one embodiment, a seismic data set comprising a plurality of traces is received, and noise metrics for the seismic data set are computed using a set of time and depth windows. The seismic data set is scanned to determine a first set of groups. Each group in the first set comprises at least a first minimum number of neighboring traces for which at least one of the noise metrics is outside a predefined specification. Noise attenuation is applied to the traces in the first set of groups. Other embodiments, aspects, and features are also disclosed.
    Type: Application
    Filed: February 28, 2012
    Publication date: August 29, 2013
    Inventors: John BRITTAN, Paul LECOCQ, Andrew WRENCH
  • Patent number: 8521437
    Abstract: A method for spatially interpolating pressure values of seismic data uses known values of pressure and spatial derivatives of pressure at a plurality of irregularly spaced locations along the direction of interpolation. The interpolation preferably uses an interpolation operator calculated by assuming that an interpolated pressure value comprises a linear combination of the known pressure values at locations xi and the spatial derivatives at locations X?, with operator coefficients wi and w? respectively, and calculating the coefficients by minimizing an error function.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: August 27, 2013
    Assignee: WesternGeco L.L.C.
    Inventor: Ian Moore
  • Patent number: 8483009
    Abstract: Embodiments use seismic processing methods that account for the spatial variability of surface wave velocities. Embodiments analyze surface wave properties by rapidly characterizing spatial variability of the surface waves in the seismic survey data (302). Filtering criteria are formed using the spatial variability of the surface waves (204). The filtering criteria can then be used to remove at least a portion of the surface waves from the seismic data (206, 319). The rapid characterization involves estimating a local group velocity of the surface waves by cross-correlation of the analytic signals (302).
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: July 9, 2013
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Sunwoong Lee, Warren S. Ross
  • Patent number: 8483964
    Abstract: 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 multiple angle stacks are used, the time shifts are corrected to zero offset. A running time window is defined, and within each window the time shifts are best fit to a straight-line function of time (depth), one angle stack at a time (33). The slopes from the straight line fits from different angle stacks are averaged at each voxel in the data volume, which yields a reservoir properties (?v/v) data volume (34). This data volume may be filtered with a low-pass filter to improve signal-to-noise (35). The resulting data volume may be merged with the 4D data volume to expand its bandwidth (36), or it may be converted into a reservoir saturation and pressure change data volume (38) using a rock-physics model (37).
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: July 9, 2013
    Assignee: ExxonMobil Upstream Research Company
    Inventor: Dez Chu
  • Publication number: 20130173169
    Abstract: The current application is directed to computational systems and methods carried out by the computational systems for characterizing and/or imaging subsurface features based on digitally encoded data collected during exploration-seismology experiments. In particular, the current application is directed to computationally efficient methods and systems for processing data collected across a two-dimensional surface to produce, by stepwise propagation, a digitally encoded, stored-data representation of a three-dimensional pressure wavefield that is used in many different applications. In certain applications, the stored-data representation of a three-dimensional pressure wavefield is used, along with initial values and a portion of the boundary conditions, to solve for unknown portions of boundary conditions, including the structures and distributions of subsurface features and materials.
    Type: Application
    Filed: December 31, 2011
    Publication date: July 4, 2013
    Applicant: PGS Geophysical AS
    Inventor: Naide Pan
  • Patent number: 8478531
    Abstract: A best fitting trace in seismic data is determined for a desired trace to be reconstructed. A dip-based correction is calculated per trace and per sample for differences in azimuth, common midpoint coordinates, and offset between the best fitting trace and the desired trace. The dip-based correction is applied to the best fitting trace to reconstruct the desired trace for 3D surface-related multiple prediction.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: July 2, 2013
    Assignee: PGS Geophysical AS
    Inventors: Peter A. Aaron, Roald G. van Borselen, Robertus F. Hegge, Simon R. Barnes
  • Patent number: 8472282
    Abstract: The disclosure describes a method and apparatus for effectively communicating data along an acoustic transmission path. The method comprises driving an acoustic transmitter to send a data signal along the acoustic transmission path, where the signal is distorted by ambient noise. The distorted signal is input to a spaced apart plurality of sensors so that consequent time-delayed signals provide reinforcement of the basic signal and attenuation of the ambient noise component when combined.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: June 25, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Kevin D. Fink, Donald G. Kyle, Michael L. Fripp
  • Patent number: 8473264
    Abstract: A method of processing geophysical data including at least measured potential field data from a potential field survey of a surveyed region of the earth to provide a representation of the geology of said surveyed region, the method comprising generating a first model of said surveyed region by fitting data predicted by said first model to said measured data for a specified frequency range; predicting full range potential field data for all measured frequencies using said generated first model; comparing said full range predicted data to said measured potential field data to provide full range residual data representing a difference between the full range predicted data and the full range measured data, and interpreting said full range residual data to provide a representation of said geology of said surveyed region.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: June 25, 2013
    Assignee: Arkex Limited
    Inventors: Gary James Barnes, John Morris Lumley, Mark Davies, Joseph Jean Barraud
  • Patent number: 8467265
    Abstract: A technique for processing seismic data acquired in a seismic survey conducted in the presence of a rough sea includes receiving a first dataset that is derived from data acquired by a first set of seismic sensors generally towed at a first depth in the seismic survey and receiving a second dataset that is derived from data acquired by a second set of seismic sensors generally towed at a second depth that is different than the first depth in the seismic survey. The first dataset is indicative of at least pressure measurements, and the second dataset is indicative of at least crossline particle motion measurements. The technique includes determining crossline particle motion measurements in the presence of a relatively flat sea surface based at least in part on the crossline measurements that are indicated by the second dataset and the pressure measurements that are indicated by the first dataset.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: June 18, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Dirk-Jan van Manen, Massimiliano Vassallo
  • Patent number: 8451685
    Abstract: A method and system for processing synchronous array seismic data includes acquiring synchronous passive seismic data from a plurality of sensors to obtain synchronized array measurements. A reverse-time data process is applied to the synchronized array measurements to obtain a plurality of dynamic particle parameters associated with subsurface locations. These dynamic particle parameters are stored in a form for display. Maximum values of the dynamic particle parameters may be interpreted as reservoir locations. The dynamic particle parameters may be particle displacement values, particle velocity values, particle acceleration values or particle pressure values. The sensors may be three-component sensors. Zero-phase frequency filtering of different ranges of interest may be applied. The data may be resampled to facilitate efficient data processing.
    Type: Grant
    Filed: September 25, 2011
    Date of Patent: May 28, 2013
    Assignee: Spectraseis AG
    Inventors: Erik Saenger, Brian Steiner, Stefan Schmalholz
  • Patent number: 8451684
    Abstract: Embodiments are directed to systems and methods (200, 300) that enable spatial variability of surface waves to be accounted for in dispersion correction in seismic data processing. This yields superior surface wave noise mitigation, with reduced likelihood of attenuating signal. Embodiments are operative with spatially inhomogeneous media.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: May 28, 2013
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Sunwoong Lee, Warren S. Ross
  • Patent number: 8447524
    Abstract: A computer-implemented method is provided for searching and analyzing a seismic data volume acquired in a seismic survey to determine potential for hydrocarbon accumulations in an associated subsurface region. Surfaces describing the seismic data volume are obtained. The surfaces are enumerated. At least one enumerated surface is selected. The at least one selected surface is augmented when the selected surface does not substantially cover an area associated with the seismic data volume. The augmenting is performed until all selected surfaces substantially cover the area. The at least one selected surface is displayed, with geologic or geophysical data associated therewith, for visual inspection or interpretation, or saving digital representations thereof to computer memory or data storage.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: May 21, 2013
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Ganglin Chen, Dominique G Gillard, Matthias Imhof
  • Patent number: 8417458
    Abstract: A method for processing geophysical data. The method includes generating a model from geophysical data acquired at a receiver location and one or more boundary receiver locations. After generating the model, the method applies a forward modeling algorithm using information from the model to generate a modeled estimate of a direct ground roll between the receiver location and each boundary receiver location. The method then estimates a ground roll between a source location and each boundary receiver location.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: April 9, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: David Fraser Halliday, Andrew Curtis
  • Patent number: 8396668
    Abstract: It is described a method of interpolating and extrapolating seismic recordings, including the steps of deriving particle velocity related data from seismic recordings obtained by at least one streamer carrying a plurality of multi-component receivers and using the particle velocity related data to replace higher derivatives of pressure data in an expansion series.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: March 12, 2013
    Assignee: WesternGeco L.L.C.
    Inventor: Johan Olof Anders Robertsson
  • Patent number: 8380440
    Abstract: A method for processing seismic data. The method may include splitting the seismic data into multiple datasets according to one or more offsets; determining a first shift amount in three or more dimensions of the seismic data between a dataset having a first offset and a dataset having a second offset, determining a second shift amount in the three or more dimensions between the dataset having the second offset and a dataset having a third offset, determining a cumulative shift amount based on a shift of the first shift amount and the second shift amount and determining a corrected dataset based on the dataset having the third offset and the cumulative shift amount.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: February 19, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Victor Aarre, Patrick Smith
  • Publication number: 20130030710
    Abstract: A horizon-picking solution for a geological volume of interest is determined. To determine the horizon-picking solution, a plurality of horizons through the geological volume of interest included in an initial horizon-picking solution are perturbed to more closely follow the local character of measured data related to the geological volume of interest. In particular, the horizons may be perturbed simultaneously by blending the initial solution with a secondary horizon-picking solution that automatically identifies a plurality of horizons through the geological volume of interest that follow the measured data related to the geological volume of interest.
    Type: Application
    Filed: July 28, 2011
    Publication date: January 31, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: Jesse Mathias Lomask, Jason Michael Francis, William Stephen Kowalik, Younis Altobi
  • Patent number: 8352192
    Abstract: An exemplary method for filtering multi-component seismic data is provided. One or more characteristics of the seismic data corresponding to a relative manifestation of surface wave noise on the different components, such as polarization attributes, are identified. A time-frequency boundary in the seismic data is also identified in the time-frequency transform domain, the time-frequency boundary delineating portions of the seismic data estimated to contain surface wave noise (302). Finally, filtered seismic data are created (306) by removing portions of the seismic data that correspond to the identified characteristics of surface waves and that are within the time-frequency boundary (303).
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: January 8, 2013
    Assignee: ExxonMobil Upstream Research Comapny
    Inventors: Mamadou S. Diallo, Marvin L. Johnson, Warren S. Ross, Christine E. Krohn
  • Patent number: 8352190
    Abstract: An exemplary embodiment of the present invention provides a method for interpolating seismic data. The method includes collecting seismic data of two or more types over a field (401), determining an approximation to one of the types of the seismic data (402), and performing a wave-field transformation on the approximation to form a transformed approximation (405), wherein the transformed approximation corresponds to another of the collected types of seismic data. The method may also include setting the transformed approximation to match the measured seismic data of the corresponding types at matching locations (408), performing a wave-field transformation on the transformed approximation to form an output approximation (412), and using the output approximation to obtain a data representation of a geological layer (416).
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: January 8, 2013
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Anatoly Baumstein, Ramesh Neelamani
  • Publication number: 20120330554
    Abstract: A method for estimating velocity dispersion in seismic surface waves in massive 3-D data sets (401) that improves upon auto-picking of a curve along the peak or ridge of the magnitude of the beam-formed field (402). The seismic data are transformed to the frequency-slowness domain, where nonlinear constrained optimization is performed on the transformed data. The optimization matches a nonlinear mathematical parametric model (403) of a beam-formed field to that in the transformed data, adjusting the parameters each iteration to reduce mismatch (404). Dispersion curves are determined by the center of the beam in the optimized models (405). A preferred nonlinear parametric mathematical model is a Gaussian-shaped beam or a cosine-tapered boxcar beam.
    Type: Application
    Filed: May 11, 2012
    Publication date: December 27, 2012
    Inventors: Warren S. Ross, Sunwoong Lee
  • Patent number: 8340792
    Abstract: A system and method of managing therapy provided to patients in an institution. The system monitors all aspects of the medication delivery to a patient, as well as other information related to the patient, such as values of vital signs, laboratory results and patient factors such as history, diagnosis, allergies and the like. The system includes one or more databases of information, including institutionally developed rules, guidelines and protocol representing the best medical practices of the institution. The system provides alerts and/or recommendations based on the application of the rules to the information being monitored, and alerts care givers accordingly, providing for dynamic adjustment of the patient's therapy. The system also monitors the status of the alerts, and if no action is taken in a selected period of time, may escalate the priority of the alert and/or halt the delivery of medication to the patient until the alert is resolved.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: December 25, 2012
    Assignee: CareFusion 303, Inc.
    Inventors: Joseph Condurso, Cynthia Yamaga, Robert Butterfield, Simon Morling, Clifton Pait, Patricia West, Timothy Vanderveen, Richard Crass
  • Patent number: 8331192
    Abstract: The technologies described herein include systems and methods for performing a first seismic survey and performing a second seismic survey after a predetermined amount of time has lapsed between the first seismic survey and the second seismic survey. The shot times and the shot positions of the second seismic survey may be substantially the same as the shot times and the shot positions of the first seismic survey. After performing the seismic surveys, seismic data generated by the first seismic survey may be processed to generate a first image, and seismic data generated by the second seismic survey may be processed to generate a second image. After generating the first and second images, a difference between the first image and the second image may be computed to generate a time lapse difference image.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: December 11, 2012
    Assignee: WesternGeco L.L.C.
    Inventors: Johan O. A. Robertsson, Dirk-Jan Van Manen, David Halliday, Robert Laws
  • Patent number: 8332154
    Abstract: 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 multiple angle stacks are used, the time shifts are corrected to zero offset. A running time window is defined, and within each window the time shifts are best fit to a straight-line function of time (depth), one angle stack at a time (33). The slopes from the straight line fits from different angle stacks are averaged at each voxel in the data volume, which yields a reservoir properties (??/?) data volume (34). This data volume may be filtered with a low-pass filter to improve signal-to-noise (35). The resulting data volume may be merged with the 4D data volume to expand its bandwidth (36), or it may be converted into a reservoir saturation and pressure change data volume (38) using a rock-physics model (37).
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 11, 2012
    Assignee: ExxonMobil Upstream Research Company
    Inventor: Dezhi Chu
  • Patent number: 8326544
    Abstract: Methods, systems and software for generating a multi-dimensional volume are disclosed. The methods include decomposing one or more original volumes into a collection of diplets, wherein each diplet includes information about spatial location, orientation, amplitude, wavelet, acquisition configuration, and coherency. The methods further include migrating the collection of diplets using one or more of a velocity model or an anisotropic velocity model, and synthesizing one or more of the migrated diplets to an output multi-dimensional seismic volume.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: December 4, 2012
    Assignee: WesternGeco L.L.C.
    Inventor: Chengbin Peng
  • Patent number: 8326542
    Abstract: A computer implemented method for retrieving seismic data from a seismic section provided in a bitmap format. The method includes reconstructing a two dimensional matrix of seismic interpolated data in which a value at a given pixel in the matrix is proportional to local density of wiggles in the seismic section with an added value of a previously calculated pixel. The method may be implemented in either of computer hardware configured to perform said method and computer software embodied in a non-transitory, tangible, computer-readable storage medium. Also disclosed are corresponding computer program product and data processing system.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: December 4, 2012
    Assignee: International Business Machines Corporation
    Inventors: Dan Shmuel Chevion, Yaacov Navon
  • Patent number: 8321134
    Abstract: Seismic image filtering machines, systems, program products, and computer implemented methods are provided to generate a filtered seismic image responsive to filtered seismic image data generated by attenuating coherent seismic noise from surface waves of an unfiltered wavefield constructed from unfiltered seismic image data through a single downward extrapolation of the unfiltered wavefield using a plurality of nonstationary convolution operators to perform localized filtering at each of a plurality of spatial locations of the unfiltered wavefield. Various embodiments, for example, can beneficially handle strong lateral velocity variations thus making various embodiments effective tools to remove complicated coherent seismic noise which is typically in the form of exponentially decaying evanescent waves.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: November 27, 2012
    Assignee: Saudi Arabia Oil Company
    Inventor: Saleh M. Al-Saleh
  • Publication number: 20120290213
    Abstract: Seismic data acquired by independent simultaneous sweeping (ISS®) techniques are processed is to attenuate random uncompressed cross-talk signals and improve the resolution of the pre-stack migrated time image. A frequency-varying mean filter is applied on cross-spread offset-azimuth gathers of the data. The frequency-space domain filter may vary its window size according to the characteristics of the cross-talk.
    Type: Application
    Filed: May 10, 2012
    Publication date: November 15, 2012
    Applicant: Saudi Arabian Oil Company
    Inventors: Shoudong Huo, Hai Xu
  • Publication number: 20120290214
    Abstract: Acquisition of data by managing crosstalk interference with sector designs and unique sweeps is conducted and the resultant data are processed in 3D common receiver domain to attenuate crosstalk noise while preserving the signals for high source and receiver density acquisition designs. High-amplitude spectral amplitudes are attenuated and inter-ensemble statics or structural time delays are applied to achieve optimum filter performance. If the spectral amplitudes have been attenuated to a level consistent with non-simultaneous acquisition, conventional surface consistent processing can be performed to correct for statics and amplitude variations. A 3-point filter in different frequency bands may then be applied to remove any remaining residual crosstalk noise.
    Type: Application
    Filed: May 10, 2012
    Publication date: November 15, 2012
    Applicant: Saudi Arabian Oil Company
    Inventors: Shoudong Huo, Hai Xu, Peter I. Pecholcs
  • Patent number: 8311776
    Abstract: The Data Throughput Tester (“DTT”) provides efficient and reliable methods to characterize the performance capabilities of electronic data systems. Embodiments of the DTT may allow test organizations to find the throughput limitations of a data system under test to the nearest whole packet in both an efficient and reliable manner. Embodiments of the DTT may allow determination of the throughput of a data system under test under the requirement that data output obtained from the data system is identical to the data input provided to the data system. Further embodiments of the DTT may allow determination of the throughput of a data system under test under the condition that specific performance characteristics of the data system under test satisfy pre-defined benchmark parameters.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: November 13, 2012
    Assignee: Verizon Patent and Licensing Inc.
    Inventor: Robert Blackledge
  • Patent number: 8301385
    Abstract: Beamed data can be obtained from shot gather data, and debeamed data can be obtained from beamed data. Shot gather data for a geophysical volume of interest in a first domain and/or beamed data in a third domain may be received. The first domain has a component relating to seismic wave propagation time and a spatial component relating to lateral spacing. The third domain has a component relating to local plane wave arrival time at a beam center surface location and a component relating to plane wave arrival directions. Data may be transformed between the first domain and a second domain. The second domain has a frequency component and a spatial component corresponding to the spatial component of the first domain. A forward or reverse transform may be applied to transform shot gather data in the first domain to/from beamed data in the third domain.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: October 30, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Chaoshun Hu, Yue Wang, Tamas Nemeth
  • Publication number: 20120271552
    Abstract: An apparatus and method for estimating at least one parameter of interest for an earth formation by reducing an uncertainty in seismic parameters using density information. The density information may be acquired from borehole gravity information. The method may include inverting seismic parameters while using density information obtained from borehole gravity information. The method may also include joint inversion of seismic parameters with density information. The apparatus may include a gravimeter and a processor configured to estimate the parameter of interest using the seismic parameters and density information.
    Type: Application
    Filed: April 22, 2011
    Publication date: October 25, 2012
    Inventors: Yuliy A. Dashevsky, Aleksandr N. Vasilevskiy, Gleb V. Dyatlov
  • Publication number: 20120271551
    Abstract: A vibrator-coupled ground filter improves seismic data recorded during a seismic operation. This filter is based on a ground model that takes into consideration the vibrator system, the coupling system between the baseplate and captured ground, and the coupled ground system. Using acceleration data from the baseplate and the reaction mass, the ground model can be used to derive particular variables for the ground model to help characterize the system. Using the derived variables in a ground filter, the recorded seismic data can be corrected to remove errors in the trace data produced by typical assumptions.
    Type: Application
    Filed: October 14, 2011
    Publication date: October 25, 2012
    Inventors: Zhouhong Wei, Thomas Phillips
  • Publication number: 20120259553
    Abstract: Recorded seismic data are represented as a convolution of operators representing a reflectivity series of the earth and a seismic wavelet. The recorded seismic wavelet is represented as a convolution of operators representing a receiver ghost, a source ghost, a ghost-free source system response, an earth filter response, and a receiver system response. The operator representing the receiver ghost is removed from the convolution representing the seismic wavelet. The operator representing the source ghost is removed from the convolution representing the seismic wavelet. The operator representing the ghost-free source response is removed from the convolution representing the seismic wavelet. The operator representing the earth filter response is removed from the convolution representing the seismic wavelet. The operator representing the seismic wavelet is removed from the convolution representing the recorded seismic data.
    Type: Application
    Filed: April 5, 2011
    Publication date: October 11, 2012
    Inventors: Gregory Ernest Parkes, Stian Hegna, Anthony James Day
  • Publication number: 20120245851
    Abstract: Adaptive filtering method to remove ground roll from seismic data. In an M channel adaptive filter, weights Wi are set using an adaptive algorithm based on seeking the minimum in the partial differential of cost function J. The cost function includes an expansion of the primary trace d into d=dg+?d (where: dg is ground roll contribution and ?d=dsig+dran, where dsig is the reflected signal component and dran is a random noise component) and a corresponding expansion of the reference x into x=xg+?x (where xg is ground roll contribution and ?x=xsig+xran; where xsig is a reflected signal component and xran is a random noise component). The delta components are included in the denominator of cost function J to provide an optimal solution of the filter coefficients biased by the reflection signal and random noise is removed.
    Type: Application
    Filed: September 20, 2010
    Publication date: September 27, 2012
    Inventor: Ying Ji
  • Patent number: 8260555
    Abstract: To perform a marine survey, a streamer is deployed into a body of water, where the streamer has plural first sensors to perform a subterranean survey. Indications are received from second sensors in corresponding sections of the streamer, where the indications are regarding which sections are in the body of water. Information is updated regarding which sections of the streamer are in the body of water in response to the received indications.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: September 4, 2012
    Assignee: WesternGeco L.L.C.
    Inventor: Kenneth E. Welker
  • Publication number: 20120215453
    Abstract: Computing device, computer instructions and method for denoising seismic data recorded with seismic receivers. The method includes receiving the seismic data recorded with the seismic receivers, wherein the seismic data is recorded in a time-space domain; applying with a computing device a high resolution transform to the seismic data in the time-space domain to obtain transformed seismic data in a different domain than the time-space domain, such that the method is amplitude preserving; determining regions of noise and regions of true signal in the transformed seismic data; scaling down the regions of noise; and reverse transforming the transformed seismic data to the time-space domain.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 23, 2012
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Gordon POOLE
  • Publication number: 20120209531
    Abstract: Apparatuses and methods for collecting and analyzing seismic data (D) include a frequency dependent noise factor (?2) for stabilizing a transformation matrix (S). The noise factor (?2) is a function of a number of nonzero eigenvalues of the transformation matrix (S).
    Type: Application
    Filed: March 31, 2010
    Publication date: August 16, 2012
    Inventor: Jonathan Lewis Sheiman
  • Patent number: 8243547
    Abstract: A method for identifying and suppressing water column reverberations (“multiple reflections”) in two-component ocean bottom seismic data is disclosed. The method involves processing the hydrophone (P) data and the geophone (Z) data separately to produce two stacked images of the subsurface (21). Analyzing the stacked P-image and the stacked Z-image together can be used to identify multiple reflections (22). Analyzing the stacked /?-image and the stacked Z-image together with an image of the subsurface created from hydrophone and geophone data combined in the usual way (PZ-image) (20) can be used to identify residual multiples in the PZ image (23). The stacked P and Z images can be combined using an existing PZ combination technique to suppress multiples (24). The efficiency of the PZ combination technique at suppressing multiples is increased because of the higher signal-to-noise ratio of stacked data.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: August 14, 2012
    Assignee: ExxonMobil Upstream Research Co.
    Inventors: Jonathan Stewart, Andrew P. Shatilo, Tommie D Rape
  • Patent number: 8239135
    Abstract: Filters are applied to seismic signals representative of subsurface formations to generate filtered signals with attenuated spatially aliased energy. The filtered signals are multiplied in the frequency-wavenumber domain by a complex function of frequency and wavenumber representing the seismic attribute in the frequency-wavenumber domain, to generate scaled signals. The scaled signals, transformed to the time-space domain, are divided by the filtered signals in the time-space domain, to a seismic attribute useful for identifying and characterizing the subsurface formations.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: August 7, 2012
    Assignee: PGS Geophysical AS
    Inventors: Anthony James Day, Tilman Klüver
  • Patent number: 8218394
    Abstract: A method of imaging the Earth's subsurface using passive seismic interferometry tomography includes detecting seismic signals from within the Earth's subsurface over a time period using an array of seismic sensors, the seismic signals being generated by seismic events within the Earth's subsurface. The method further includes adaptively velocity filtering the detected signals. The method further includes cross-correlating the velocity filtered seismic signals to obtain a reflectivity series at a position of each of the seismic sensors.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: July 10, 2012
    Assignee: Microseismic, Inc.
    Inventors: Chuntao Liang, Michael P. Thornton, Peter M. Duncan
  • Patent number: 8219322
    Abstract: A method of processing stratigraphic data comprising a plurality of stratigraphic features, such as horizon surfaces, within a geological volume is provided. The method includes the steps of: extending a plurality of spaced sampling traces through the volume to traverse the stratigraphic features; and assigning the stratigraphic features respective relative geological ages. On each sampling trace, the relative geological age of each stratigraphic feature traversed by the sampling trace in the direction from geologically younger to geologically older stratigraphic features is increased in relation to the relative geological age of its preceding stratigraphic feature, under the condition that each stratigraphic feature takes the same relative geological age across all the sampling traces by which it is traversed.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: July 10, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Erik Monsen, Hilde Grude Borgos, Torbjorn Eikli Smorgrav, Lars Sonneland
  • Patent number: 8219320
    Abstract: A method and system for processing three component seismic data includes determining a covariance data matrix from three component seismic data for each of a plurality of time periods to obtain eigenvectors and eigenvalues. One or more seismic attributes are calculated from the eigenvectors and eigenvalues for each of a plurality of time periods. A stability measure is determined from the calculated seismic attribute for each of the plurality of time periods and stored for display.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: July 10, 2012
    Assignee: Spectraseis AG
    Inventor: Erik Hans Saenger
  • Publication number: 20120163122
    Abstract: A technique includes decomposing a signal that is derived from a seismic acquisition into a plurality of signals such that each signal is associated with a different frequency band. For each signal of the plurality of signals, the technique includes performing the following: decomposing the signal into subbands in successive stages, where the subbands are associated with at least different frequency ranges of the signal; selectively applying adaptive noise attenuation in between the successive stages such that the stages decompose noise-attenuated subbands; and reconstructing the signal from the subbands resulting from the decomposition. The technique includes combining the reconstructed signals.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Inventors: Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
  • Patent number: 8209126
    Abstract: A computer-implemented method for processing data includes accepting a first collection of traces corresponding to signals received over time due to reflection of seismic waves from subsurface structures. A Radon transform is defined with respect to a set of wavefront parameters of the seismic waves. The transform defines a summation of amplitudes of the seismic waves over trajectories defined by the wavefront parameters. The Radon transform is applied to the first collection of traces, so as to convert the first collection into a multidimensional data array that is defined as a function of at least two of the wavefront parameters. The multidimensional data array is processed to produce a second collection of traces having an improved imaging quality with respect to the first collection. The second collection of traces is processed to generate a seismic image of the subsurface structures at the improved imaging quality.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: June 26, 2012
    Assignee: Geo{umlaut over (m)}age (2003) Ltd.
    Inventors: Alexander Berkovitch, Igor Belfer, Roman Kazinnik
  • Patent number: 8203906
    Abstract: The technologies described herein include systems and methods for performing a first seismic survey and performing a second seismic survey after a predetermined amount of time has lapsed between the first seismic survey and the second seismic survey. The shot times and the shot positions of the second seismic survey may be substantially the same as the shot times and the shot positions of the first seismic survey. After performing the seismic surveys, seismic data generated by the first seismic survey may be processed to generate a first image, and seismic data generated by the second seismic survey may be processed to generate a second image. After generating the first and second images, a difference between the first image and the second image may be computed to generate a time lapse difference image.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: June 19, 2012
    Assignee: WesternGeco L.L.C.
    Inventors: Johan O. A. Robertsson, Dirk-Jan Van Manen, David Halliday, Robert Laws
  • Patent number: RE43853
    Abstract: Disclosed is a method for concealing a dark defect in an image sensor. The method includes the steps of: setting a window including five sequential pixels from pixel data sequentially outputted, the third pixel and the fifth pixels being identical in Bayer color with each other and the second and the fourth pixels being identical in Bayer color with each other; calculating an average value ? of the first and the fifth pixels and a plurality of ?/n obtained by dividing the average value ? by n; selecting one of the plurality of ?/n; comparing a threshold value ?+?/n calculated by adding the average value ? to the selected ?/n with a value of the third pixel in size; and omitting a concealment of the dark defect when the threshold value ?+?/n is greater than the value of the third pixel.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: December 11, 2012
    Assignee: Intellectual Ventures II LLC
    Inventor: Wan-Hee Jo