Filtering Or Noise Reduction/removal Patents (Class 702/17)
  • Patent number: 10809805
    Abstract: Described herein is a method for determining a higher order resonance mode frequency of a haptic actuator for an electronic device. The higher order resonance mode frequency may correspond to a frequency in which a mass of the haptic actuator exhibits undesired movement. The movement may cause the mass to collide or otherwise impact an enclosure of the haptic actuator. Once the higher order resonance mode frequency is determined, a delay or a polarity inversion may be added to one or more of a series of input waveforms to suppress or brake the undesired movement.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: October 20, 2020
    Assignee: Apple Inc.
    Inventor: Denis G. Chen
  • Patent number: 10705238
    Abstract: The present disclosure discloses a method and an apparatus for processing seismic data, and belongs to the field of geological surveys. The method comprises: stacking seismic trace gathers in a predetermined range among S seismic trace gathers after a Normal Move Out (NMO) correction processing to obtain a model trace, S being an integer; calculating a correlation coefficient of each seismic trace gather with the model trace, and selecting a K-th seismic trace gather with a maximum correlation coefficient; calculating an optimum point of each seismic trace gather from the K-th seismic trace gather to two sides orderly; and performing a residual NMO correction of the seismic trace gathers according to the optimum points.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: July 7, 2020
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Guangrong Zhang, Fusen Xiao, Qi Ran, Shirong Zhang, Yi Yu, Qi Liao, Bo Ma, Han Liang, Kang Chen, Xuan Zhang, Xiaomin Lu
  • Patent number: 10670751
    Abstract: A preserved-amplitude RTM-based FWI method is used to obtain an image of an explored subsurface formation. Model data corresponding to detected data is generated using a velocity model of the formation. Residuals representing differences between the modeled data and the detected data are back-propagated to then update the velocity model a local optimization based on a deconvolution formula employing a backward propagating wavefield and a forward propagating wavefield. Geophysical features of the formation are imaged based on the updated velocity model.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: June 2, 2020
    Assignee: CGG SERVICES SAS
    Inventors: Botao Qin, Gilles Lambare
  • Patent number: 10571583
    Abstract: Methods of acquiring and processing seismic data using derivative sensors, such as strain sensors, that facilitate ground roll noise attenuation with seismic interferometry are disclosed. The methods use both seismic data and their spatial derivatives in computing ground-roll noises which are removed from processed seismic data.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: February 25, 2020
    Assignee: WESTERNGECO L.L.C.
    Inventors: David Fraser Halliday, Julian Edward Kragh, Filippo Broggini
  • Patent number: 10520620
    Abstract: Surface wave coda in seismic data recorded with a data acquisition system over an underground formation is estimated using time-reversal experiments. First time-reversal experiments use a first time-reversal mirror including a target source and one or more other sources to obtain estimates of surface waves traveling from other receivers to a target receiver. Second time-reversal experiments obtain a coda estimate for a surface wave traveling from the target source to the target receiver using a second time-reversal mirror including the target receiver and the other receivers.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: December 31, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Corentin Chiffot
  • Patent number: 10481287
    Abstract: Methods for correcting seismic signals by determining a signature of an outcropping geobody (e.g., a sand dune) from unprocessed seismic data, attenuating the seismic data using a variable gap deconvolution, and performing a surface consistent deconvolution and amplitude correction on the seismic data. A signature associated with the outcropping geobody and corresponding to the geometry of the geobody may be identified from the unprocessed seismic data. The signature may be used in subsequent processing, such for the determination of a variable gap length for a variable gap deconvolution applied to the seismic data. Computer-readable media and systems for correcting seismic signals are also provided.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: November 19, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: Mamadou Sanou Diallo
  • Patent number: 10444390
    Abstract: Disclosed is a method of, and computer program and apparatus for, identifying reflected signals, subsequent to their reflection within a medium. The method comprises obtaining return signals (100), resulting from measurements being performed over a measurement period. The measurement period comprises sub-periods, the return signals comprising reflected signals and noise. The plurality of return signals are partitioned into plural sets (220) of equal cardinality or as equal as possible such that their cardinality differs by no more than one. A stacked correlation value is determined (130) for the return signals by determining the mean of the return signals across the plural sets (230) and determining a correlation value of the plural sets over each of the time sub-periods (240). Peaks in the variation of the stacked correlation value over time can then be identified and each of the peaks in the variation of the stacked correlation value over time can be attributed to a reflected signal.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: October 15, 2019
    Assignee: Adrok Limited
    Inventor: Cornelis Pieter Van Der Doel
  • Patent number: 10444393
    Abstract: A system for attenuating coherent noise from seismic data comprises one or more sensors configured to sense waves generated by a seismic source and a coherent noise attenuation module communicably coupled to the one or more sensors and comprising a processor and memory. The coherent noise attenuation module is operable to receive a plurality of traces of seismic data from the one or more sensors and apply a first transformation to the plurality of traces, identify one or more outlier waveforms in the transformed traces, attenuate the identified outlier waveforms, and apply a second transformation to the plurality of traces that is the inverse of the first transformation.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: October 15, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Dongjie Cheng, Laura Torres Laza, Xiaomin Zhao
  • Patent number: 10393901
    Abstract: Methods and systems of generating seismic images from primaries and multiples are described. Methods separate pressure data into up-going pressure data and down-going pressure data from pressure data and vertical velocity data. Irregularly spaced receiver coordinates of the down-going and up-going pressure data are regularized to grid points of a migration grid and interpolation is used to fill in down-going and up-going pressure data at grid points of the migration grid. A seismic image is calculated at grid points of the migration grid based on the interpolated and regularized down-going pressure data and the interpolated and regularized up-going pressure data. The seismic images are high-resolution, have lower signal-to-noise ratio than seismic images generated by other methods, and have reduced acquisition artifacts and crosstalk effects.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: August 27, 2019
    Assignee: PGS Geophysical AS
    Inventors: Shaoping Lu, Norman Daniel Whitmore, Jr., Alejandro Antonio Valenciano Mavilio, Nizar Chemingui
  • Patent number: 10371844
    Abstract: Methods for processing seismic data acquired with non-impulsive moving sources are provided. Some methods remove cross-talk noise from the seismic data using emitted signal data and an underground formation's response estimate, which may be iteratively enhanced. Some methods perform resampling before a spatial or a spatio-temporal inversion. Some methods compensate for source's motion during the inversion, and/or are usable for multiple independently moving sources.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: August 6, 2019
    Assignee: CGG SERVICES SAS
    Inventors: Gordon Poole, Can Peng
  • Patent number: 10353099
    Abstract: A method and system of processing seismic data is presented. The method may include, for each of a plurality of seismic traces, generating a respective intermediate set of reflectivity coefficients and a partial deconvolution of an estimated wavelet from the respective seismic trace. The method may also include decomposing a model into a plurality of orthogonal components, and projecting each of a plurality of eigenvectors corresponding to one of the orthogonal components onto intermediate reflectivity coefficients corresponding with all of the plurality of seismic traces at each of a plurality of times to generate a plurality of eigen-coefficients associated with each of the plurality of times. The eigen-coefficients may be used to generate a plurality of basis coefficients, which may then be used to generate a respective updated set of reflectivity coefficients for each of the seismic traces.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: July 16, 2019
    Assignee: ION Geophysical Corporation
    Inventor: Douglas Spencer Sassen
  • Patent number: 10353098
    Abstract: A technique includes spatially filtering a signal that is derived from a seismic acquisition. The filtering is associated with a filter length, and the filtering includes varying the filter length with frequency. The filtering may be used in connection with adaptive noise attenuation, which is applied to decomposed subbands. Furthermore, the filtering may be applied during the reconstruction of the signal from the subbands.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: July 16, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: James Edward Martin, Ahmet Kemal Özdemir, Bent Andreas Kjellesvig, Ali Ozbek
  • Patent number: 10324208
    Abstract: Methods and systems for optimized receiver-based ghost filter generation are described. The optimized ghost filter self-determines its parameters based on an iterative calculation of recorded data transformed from a time-space domain to a Tau-P domain. An initial ghost filter prediction is made based on generating mirror data from the recorded data and using a least squares technique during a premigration stage.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: June 18, 2019
    Assignee: CGG SERVICES SAS
    Inventors: Ping Wang, Suryadeep Ray, Can Peng, Yunfeng Li
  • Patent number: 10295688
    Abstract: A method for removing internal multiples from collected data, such as seismic data. The method includes predicting internal multiples for each horizon in a plurality of horizons that created the internal multiples. The internal multiples may be predicted from the seismic data in one pass. After predicting the internal multiples, the method includes creating a separate model of internal multiples for each horizon based on the predicted internal multiples for each horizon. The method then iteratively subtracts each separate model of internal multiples for each horizon from the seismic data.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: May 21, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Adriana Citlali Ramirez-Perez, Alan G. Teague, Milton A. Walz, Zhiming Wu
  • Patent number: 10229344
    Abstract: An example method includes acquiring two-dimensional (2D) or three-dimensional (3D) digital images of a rock sample. The method also includes iteratively analyzing property measurements collected throughout the digital images using different subsample sizes to identify a property distribution convergence as a function of subsample size. The method also includes selecting a smallest subsample size associated with the property distribution convergence as a representative elementary area or volume for the rock sample.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: March 12, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Radompon Sungkorn, Jonas Toelke, Yaoming Mu, Carl Sisk, Abraham Grader, Naum Derzhi
  • Patent number: 10114135
    Abstract: A method includes accessing a seismic image comprising a plurality of features of interest. The method also includes defining a plurality of configuration files for a plurality of graphical models. The method further includes applying the plurality of graphical models to the seismic image. The method also includes generating a plurality of scores for each feature of interest, wherein each graphical model generates a score for each feature of interest. The method further includes combining the plurality of scores for each feature of interest into a plurality of combined scores, wherein each feature of interest has a combined score.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: October 30, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Xiaojie Huang, Ali Can, Erhan Bas, Weina Ge, Shubao Liu, Mark W. Dobin, Mary Johns
  • Patent number: 10088583
    Abstract: A technique includes generating vibroseis sweeps for a vibroseis survey to produce seismic data acquired in response to seismic signals produced by the sweeps. The generation of the vibroseis sweeps including temporally arranging the sweeps into time-overlapping groups. The technique includes regulating a timing of the groups relative to each other based on a slip time. The technique also includes regulating a timing of the sweeps of each group such that consecutive sweep firings of each group are spaced apart by a time substantially less than the slip time.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: October 2, 2018
    Assignee: WESTERNGECO L.L.C.
    Inventors: Claudio Bagaini, Ian Moore
  • Patent number: 10088588
    Abstract: There is a method for generating a final image of a subsurface of the earth. The method includes receiving measured seismic data d of the subsurface; selecting an objective function E that is function of a reflectivity r of the subsurface; and calculating, in a processor, the reflectivity r based on the measured seismic data d, the objective function E, simulated data {tilde over (d)}, a modeling operator M from a reverse time demigration (RTDM) process and an imaging operator MT from a reverse time migration (RTM) process.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: October 2, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Yu Zhang, Lian Duan, Yi Xie
  • Patent number: 10067254
    Abstract: An acquisition effect of a marine survey measurement can be parameterized as a function of time to define a parameterized acquisition effect and a subsurface effect of the marine survey measurement can be parameterized as a function of position to define a parameterized subsurface effect. The acquisition effect and the subsurface effect can be estimated based on the parameterized acquisition effect and the parameterized subsurface effect to define an estimated acquisition effect and an estimated subsurface effect, respectively. The estimated acquisition effect can be removed from the marine survey measurement.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: September 4, 2018
    Assignee: PGS Geophysical AS
    Inventor: Gert-Jan Adriaan van Groenestijn
  • Patent number: 10001362
    Abstract: A method of processing data from a distributed fibre-optic interferometric sensor system for measuring a measurand, the system comprising multiple interferometric sensors. The method comprises interrogating two or more of the multiple interferometric sensors to record a raw measurement time series for each of the sensors. The method further comprises calculating a common reference time series as a measure of central tendency of the raw measurement time series from two or more reference sensors, the reference sensors being selected from the multiple interferometric sensors. Finally, the method comprises compensating at least one raw measurement time series from a measurement sensor selected from the multiple interferometric sensors with the common reference time series to produce a compensated measurement time series, the measurement sensor being configured to be sensitive to the measurand. The invention further relates to a distributed fibre-optic interferometric sensor system.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: June 19, 2018
    Assignee: OptoPlan AS
    Inventors: Erlend Ronnekleiv, Ole Henrik Waagaard
  • Patent number: 9857488
    Abstract: A system, method and computer program product for seismic imaging implements a seismic imaging algorithm utilizing Reverse Time Migration (RTM) and Full Waveform Inversion (FWI) techniques requiring large communication bandwidth and low latency to convert a parallel problem into one solved using massive domain partitioning. Since in RTM and FWI, the forward wave propagation is iteratively calculated on time step increments, there are very high statistical correlation between the intermediate wavefields at the adjacent time steps. This correlation is exploited in compression of the intermediate wavefields so as to achieve much higher compression ratio and avoid the disk IO bottleneck and reduce the overall computing time substantially. Further, during simulation of a reverse wavefield, reverse predictive encoding technique is performed such that snapshots are not recovered in the reverse propagation path due to a prediction chain.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: January 2, 2018
    Assignee: International Business Machines Corporation
    Inventor: Ligang Lu
  • Patent number: 9772413
    Abstract: Method for acquiring, at reduced acquisition cost, seismic data using simultaneous, field-encoded sources in the field (702), and then constructing pseudo source-records (703) that better meet the requirements for using additional simultaneous computer-encoded sourcing for computer simulations or forward modeling (706) as part of (707) iterative FWI (Full Wavefield Inversion) or RTM (Reverse Time Migration), with additional reduction in computational costs. By better meeting the requirements of simultaneous sourcing for FWI or RTM (701), artifacts and crosstalk are reduced in the output. The method can be used for marine streamer acquisition and other non-fixed spread geometries to acquire both positive and negative offsets and to mitigate the “missing data” problem for simultaneous-source FWI. It can also be used for land data to overcome issues with moving spreads and long continuous records.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: September 26, 2017
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Christine E. Krohn, Partha S. Routh
  • Patent number: 9766358
    Abstract: There is provided herein a new system and method of local attribute match filtering which operates in the local attribute domain via the use of complex wavelet transform technology. This approach is adaptable to address various noise types in seismic data and, more particularly, is well suited to reduce the noise in geophone data as long as an associated hydrophone signal is relatively noise-free.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: September 19, 2017
    Assignee: BP Corporation North America Inc.
    Inventors: Zhou Yu, Imtiaz Ahmed
  • Patent number: 9720119
    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: May 13, 2014
    Date of Patent: August 1, 2017
    Assignee: Saudi Arabian Oil Company
    Inventor: Saleh M. Al-Saleh
  • Patent number: 9702998
    Abstract: Method for using the full wavefield (primaries, internal multiples and free-surface multiples) in inversion of marine seismic data, including both pressure and vertical velocity data (21), to infer a subsurface model of acoustic velocity or other physical property. The marine seismic data are separated (22) into up-going (23) and down-going (24) wavefields, and both wavefields are inverted in a joint manner, in which the final model is impacted by both wavefields. This may be achieved by inverting both wavefields simultaneously (25), or one after the other, i.e. in a cascaded approach (35?37, or 45?47), for the subsurface properties (26, 38, 48).
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: July 11, 2017
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Reeshidev Bansal, Anatoly Baumstein, Partha S. Routh
  • Patent number: 9651699
    Abstract: A method for characterizing subsurface formations penetrated by a wellbore includes accepting as input to a computer measurements of a physical parameter of the formations made over a selected axial interval of the wellbore. At least one attribute of the measurements is determined from a change in the measurements over the selected axial interval. At least one characteristic of the formations in the selected axial interval using the at least one attribute.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: May 16, 2017
    Assignee: APACHE CORPORATION
    Inventors: Cameron A Snow, James A Ruiz
  • Patent number: 9651696
    Abstract: Methods and systems for shear noise attenuation based on matching vertical particle velocity data and pressure data are described. The shear noise attenuation is based on the fact that different stages of the analysis can be performed with different numbers of wavelet orientations. The analysis is performed for frequency sub-bands for all wave numbers and vice versa.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: May 16, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Can Peng, Rongxin Huang, Biniam Asmerom
  • Patent number: 9633061
    Abstract: A method for determining event counts for a database system includes capturing samples for the active sessions based on a pre-defined sampling frequency and identifying events from the captured samples. The method further includes determining the wait time for each of the identified events and determining an event count for the active sessions using a harmonic mean. The harmonic mean is a summation of the maximum of either one or the ratio of the sampling frequency to the determined wait time for each of the identified events.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: April 25, 2017
    Assignee: Oracle International Corporation
    Inventors: Uri Shaft, Graham Stephen Wood, John Beresniewicz
  • Patent number: 9542507
    Abstract: Methods, systems, and computer-readable media for analyzing a domain are provided. The method includes defining a mask plane that includes a first dimension of a first number of voxels and a second dimension of a second number of voxels, and selecting a plurality of first angles for orientating the mask plane in the domain with respect to a first axis. The method also includes for each one of the plurality of first angles selected populating, using one or more processors, sum cubes associated with each one of a first plurality of subject voxels. The method also includes selecting a plurality of second angles, and for each one of the plurality of second angles selected, calculating a planar sum for each one of a second plurality of subject voxels selected.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: January 10, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Trond Hellem Bø
  • Patent number: 9461846
    Abstract: Certain embodiments of the present invention provide a system for improved data communications within a remote sensor system. The system includes a sensor node. The sensor node is adapted to generate data based at least in part on a detected event. The sensor node is adapted to communicate the data based at least in part on a rule. Certain embodiments of the present invention provide a method for improved data communications within a remote sensor system. The method includes detecting an event, generating data based at least in part on the event, processing the data based at least in part on a rule, and communicating the data when the rule satisfied.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: October 4, 2016
    Assignee: HARRIS CORPORATION
    Inventors: Todd William Joslin, Scott J. Cloutier, Paul Edward Voglewede, Robert A. Johnson, Michael Doser, Michael J. Russell
  • Patent number: 9442205
    Abstract: Described herein are various embodiments of methods and corresponding hardware and software that are configured to illuminate or image the permeability field around or near a well that is to be fracked, both prior to fracking and after various fracking stages. The methods and corresponding hardware and software disclosed herein permit the progress of the fracking operation to be monitored at different stages.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 13, 2016
    Assignee: Global Ambient Seismic, Inc.
    Inventors: Peter Anderson Geiser, Jan Meredith Vermilye, Charles John Sicking
  • Patent number: 9389326
    Abstract: Described herein are various embodiments of methods and corresponding hardware and software configured to permit the vicinity around and/or near a well to be imaged, where the well is being subjected to, or has been subjected to, fracking operations. The methods and corresponding hardware and software permit the generation of images of near-well fractures or faults resulting from the fracking.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 12, 2016
    Assignee: Global Ambient Seismic, Inc.
    Inventors: Jan Meredith Vermilye, Peter Anderson Geiser
  • Patent number: 9377548
    Abstract: A method for analyzing characteristics of a geological formation includes obtaining at a processor data representative of at least one of stratigraphic, structural, or physical characteristics of the geological formation, applying at the processor a wavelet transform to at least a portion of the obtained data or data interpreted or derived from the obtained data to derive one or more wavelet transform coefficients representative of the obtained data, segmenting at the processor at least one or more of the obtained data or data interpreted or derived from the obtained data into segments, determining at the processor a measure of variability of the obtained data or the data interpreted or derived from the obtained data over each segment at one or more scales of the wavelet transform.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: June 28, 2016
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Marina Hru{hacek over (s)}ka, David Katz
  • Patent number: 9366775
    Abstract: A system and method are disclosed for substantially eliminating the influence of internal multiples when seismic mapping under-water geographical areas of interest without a priori knowledge of subsurface information. The system and method iteratively locate multiple-generating horizons for predicting internal multiples and uses a lower-higher-lower relationship between the multiple generating horizons. The system and method provide an appropriate and cost-effective means for internal multiple attenuation without subsurface information.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: June 14, 2016
    Assignee: CGG SERVICES SA
    Inventors: Barry Hung, Min Wang
  • Patent number: 9348044
    Abstract: Numerical simulations of elastic wave propagation algorithms are critical components for seismic imaging and inversion. Finite-difference schemes yield good efficiency but cannot ensure the accuracy of the high frequency component. Pseudo-spectral algorithms are accurate up to the Nyquist frequency, but its efficiency depends on the optimization of the fast Fourier transform (FFT) algorithm. The conventional FFT algorithms are optimized for signal processing, in which problems are generally one dimensional time series. For 3D wave propagation, FFT algorithms have the potential to be further optimized. Under current computer hardware architecture, a vectorization scheme for high dimensional FFTs is presented. Compared to conventional numerical scheme implementations, the systems and methods disclose herein has the best performance on the slowest or higher dimensions of data.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: May 24, 2016
    Assignee: CGG SERVICES SA
    Inventors: Sheng Xu, Feng Chen
  • Patent number: 9291733
    Abstract: Computing device and method for determining primary and ghost components from S-waves recorded in near-surface conditions, wherein the S-waves are refracted or reflected from a structure in a subsurface. The method includes a step of receiving seismic data (R, V) with regard to the S-waves, wherein the seismic data includes vertical and radial components recorded with a buried three-component receiver; a step of calculating with a processor a primary component (P) and a ghost component (G) from the vertical and radial components; and a step of computing an image of a subsurface based on the primary and ghost components (P, G). The S-waves form a plane wave.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: March 22, 2016
    Assignee: CGGVERITAS SERVICES SA
    Inventor: Kristof De Meersman
  • Patent number: 9201154
    Abstract: Computing device, computer instructions and method for denoising marine seismic data recorded with first and second seismic sensors. The method includes receiving first seismic data recorded with the first sensor in a time-space domain; receiving second seismic data recorded with the second sensor in the time-space domain, calculating with a processor models of the first and second seismic data in a transform domain that is different from the time-space domain; calculating in the transform domain an energy related to a down-going energy based on the models of the first and second seismic data; determining a noise in the transform domain corresponding to the second seismic data based on the calculated energy; reverse transforming the noise from the transform domain into the time-space domain; and denoising the second seismic data by subtracting the noise in the time-space domain from the second seismic data.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: December 1, 2015
    Assignee: CGGVERITAS SERVICES SA
    Inventors: Gordon Poole, Sergio Grion
  • Patent number: 9151861
    Abstract: A system for measuring geological data is disclosed. The system includes several transceivers distributed over a geographical area. Each of the transceivers has at least one transmitter and at least one receiver. The transceivers are in communication with each other. The receivers are adapted to measure at least one electrical signal. The transmitters are adapted to inject an electrical current into a subsurface area. The transmitters operate simultaneously to inject the electrical current into the subsurface area simultaneously from a number of locations.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: October 6, 2015
    Assignee: MULTI-PHASE TECHNOLOGIES, LLC
    Inventor: Douglas John LaBrecque
  • Patent number: 9151856
    Abstract: A method for processing seismic data. The method may include receiving seismic data due to a plurality of seismic sources and applying a first operator to the seismic data to generate a first estimate of seismic data. The method may then include applying a second operator to the first estimate of seismic data to generate residual seismic data due to one or more seismic sources. The method may determine a second estimate of seismic data based on the first estimate and the residual seismic data. The method may then process the second estimate of seismic data due to each seismic source to determine the presence of hydrocarbon deposits in a subterranean area of the earth.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: October 6, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Craig J. Beasley, William H. Dragoset, Jr., Antoun Salama
  • Patent number: 9128206
    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: Grant
    Filed: December 23, 2010
    Date of Patent: September 8, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventors: Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
  • Patent number: 9063245
    Abstract: A system and computer program product for seismic imaging implements a seismic imaging algorithm utilizing Reverse Time Migration (RTM) and Full Waveform Inversion (FWI) techniques requiring large communication bandwidth and low latency to convert a parallel problem into one solved using massive domain partitioning. Since in RTM and FWI, the forward wave propagation is iteratively calculated on time step increments, there are very high statistical correlation between the intermediate wavefields at the adjacent time steps. This correlation is exploited in compression of the intermediate wavefields so as to achieve much higher compression ratio and avoid the disk IO bottleneck and reduce the overall computing time substantially. Further, during simulation of a reverse wavefield, reverse predictive encoding technique is performed such that snapshots are not recovered in the reverse propagation path due to a prediction chain.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: June 23, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Ligang Lu
  • Patent number: 9043155
    Abstract: A technique includes processing seismic data indicative of samples of at least one measured seismic signal in a processor-based machine to, in an iterative process, determine basis functions, which represent a constructed seismic signal. The technique includes in each iteration of the iterative process, selecting another basis function of the plurality of basis functions. The selecting includes based at least in part on the samples and a current version of the constructed seismic signal, determining a cost function; and interpreting the cost function based at least in part on a predicted energy distribution of the constructed seismic signal to select the basis function.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: May 26, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventors: Massimiliano Vassallo, Ali Özbek, Dirk-Jan Van Manen, Anthony D. Curtis, Kurt Eggenberger
  • Patent number: 9014985
    Abstract: A system for and computer implemented method for transforming seismic trace information includes obtaining seismic trace information for each trace, the seismic trace information including shot to receiver offset and the vertical velocity of at least one subsurface primary reflector and including respective information resulting from near-surface layering and velocity effects and relating to the primary reflector, reversibly transforming seismic trace information from each non-zero offset trace such that the respective information resulting from the near-surface effects at each non-zero offset position is moved in a time dimension such that they become effectively periodic with respect to respective primary reflector information and in accordance with a periodicity for a zero offset trace at the same surface location, filtering the transformed seismic trace information to remove at least a portion of the information resulting from near-surface effects, and inverting the reversible transforming.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: April 21, 2015
    Assignee: Chevron U.S.A. Inc.
    Inventors: Richard B. Alford, E. Frederic Herkenhoff
  • Patent number: 8976625
    Abstract: A zero-offset VSP survey is carried out with spaced apart receivers located in a vertical wellbore. Spectra of the signals at the receivers following wavefield separation are estimated. An absorption coefficient is estimated using differences in spectra between all pairs of receivers.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: March 10, 2015
    Assignee: Baker Hughes Incorporated
    Inventor: Emanouil Blias
  • Patent number: 8977503
    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: Grant
    Filed: March 31, 2010
    Date of Patent: March 10, 2015
    Assignee: Shell Oil Company
    Inventor: Jonathan Lewis Sheiman
  • Publication number: 20150066375
    Abstract: A method for removing seismic noise from an input seismic trace. The method may receive the input seismic trace. The method may receive one or more noise references for the input seismic trace. The method may receive one or more filters corresponding to the noise references. The method may apply a nonlinear function to the input seismic trace and to the one or more noise references to produce respective output signals for the input seismic trace and for the one or more noise references. The nonlinear function may be capable of determining higher-order statistics. The method may update the filters based on increasing one or more information attributes of the output signals to a predetermined threshold. The method may then filter noise corresponding to the noise references.
    Type: Application
    Filed: March 29, 2013
    Publication date: March 5, 2015
    Inventors: Kuang-Hung Liu, William H. Dragoset, JR.
  • Publication number: 20150066374
    Abstract: Performing seismic data processing using frequency diverse basis functions and converting a data processing problem into a one-norm or zero-norm optimization problem, which can be solved in frequency-space domain. The data processing problems can be data deghosting, data regularization or interpolation. The data being processed can be aliased or un-aliased, single sensor data or group-formed data, single component or multi-component data single source data or simultaneous sources, or some combinations.
    Type: Application
    Filed: April 3, 2013
    Publication date: March 5, 2015
    Inventors: Ying Ji, Julian Edward Kragh, Philip A. F. Christie
  • Patent number: 8965706
    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: Grant
    Filed: September 20, 2010
    Date of Patent: February 24, 2015
    Assignee: WesternGeco L.L.C.
    Inventor: Ying Ji
  • Patent number: 8958267
    Abstract: The invention relates to processing seismic data that includes signals from at least two sources and typically three or four sources where source separation is necessary for geophysical analysis. Specifically, the present invention is a process for correcting data prior to inversion where the correction is provided to correct for the filtering effect of the earth. The earth is a non-homogenous seismic propagator that causes distortions of wavelets of seismic energy related to the source and receiver azimuth and offset that makes the identification of source specific data within the composite data harder to identify. Computing an earth response and correcting for the effects of the earth on the wavelets provides for more resolution and more clarity in the resulting data and better geophysical interpretation.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: February 17, 2015
    Assignee: ConocoPhillips Company
    Inventors: Peter M. Eick, Joel D. Brewer
  • Patent number: 8954282
    Abstract: Implementations of various technologies for a method for processing seismic data. In one implementation, the method may include receiving a record of seismic data. The record of seismic data may have a plurality of attributes. A first seismic data process may be performed on the record of seismic data. The first seismic data process may generate a plurality of datasets. A selection of a portion of the plurality of attributes for ranking the datasets may be received. A quality score may be determined for each attribute of the portion of the plurality of attributes for each dataset. A ranking may be determined for each dataset based on the quality score.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: February 10, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Horacio R. Bouzas, Ian Scott, Gerard Kavanagh