Filtering Or Noise Reduction/removal Patents (Class 702/17)
  • Patent number: 11333781
    Abstract: A device may include a processor that may recover the signals misallocated in the deblending process of seismic data acquired with simultaneous sources. The processor may update the primary signal estimate based at least in part on a separation operation that separates coherence signals from noise signals in an output associated with the residual determined to be remaining energy for separation. The processor may be incorporated into the iterative primary signal estimate of the deblending process or be applied towards preexisting deblending output. In response to satisfying an end condition, the processor may transmit a deblended output that includes the weak coherence signals recovered from the misallocation or error in the primary signal estimate. The processor may also transmit the deblended output for use in generating a seismic image. The seismic image may represent hydrocarbons in a subsurface region of Earth or subsurface drilling hazards.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: May 17, 2022
    Inventor: Kang Fu
  • Patent number: 11320554
    Abstract: A method and a system for implementing the method are disclosed wherein the pre-stack seismic input data, an initial anellipticity anisotropy parameter, and a baseline normal moveout velocity from a non-flat surface, are sometimes mild or foothill topography as well as the shot and receiver lines might not necessarily be straight, and often curve to avoid obstacles on the land surface. In particular, the method and system disclosed, allows for updating the anisotropy parameters iteratively and when the stopping criteria is satisfied, the final estimated parameter can be directly used for time migration. This method and system are mainly used for time migration with the purpose of obtaining the high fidelity (accurate amplitude, i.e. not only travel-time correct but also amplitude correct) image gathers which are used for reservoir characterization and interpretation.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: May 3, 2022
    Inventor: Fan Xia
  • Patent number: 11249212
    Abstract: A method for displaying slowness data after defects of anisotropy and heterogeneity have been removed includes visually depicting a slowness image on a computer monitor in which the slowness image includes a log of slowness values at a plurality of depths of a wellbore and a plurality of azimuth angles about a periphery of the wellbore. The image is processed via filtering such as with a bandpass filter. The filter may be obtained via fitting a periodic function to the slowness values at each depth or via a selected periodicity value and center angle. A resultant image is displayed.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: February 15, 2022
    Inventor: Naoki Sakiyama
  • Patent number: 11212306
    Abstract: Graph database analysis for network anomaly detection systems, in which a data analysis device receives multiple log data entries including parameters associated with a computer network event in a computing network. The data analysis device extracts one or more parameters in real-time and generates a network event graph based on at least one of a first graph metric or a second graph metric. The first and second graph metrics are based on the one or more extracted parameters. The data analysis device detects, based on queries performed on the network event graph, at least one of an anomalous event associated with the computing network or a malicious event associated with the computing network.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: December 28, 2021
    Assignee: Accenture Global Solutions Limited
    Inventors: Joshua Patterson, Michael Evan Wendt, Keith Kraus, Louis William DiValentin, Robin Lynn Burkett
  • Patent number: 11209562
    Abstract: In a method for deghosting seismic data acquired by a marine seismic source and receiver assembly effects of seismic reflections by the water surface, known as ghost signals, are removed by a deghosting algorithm, which transforms input seismic data with the surface ghost reflections into source- and receiver-deghosted seismic data using a sparse-inversion technique both for hydrophone and/or geophone recordings, which technique includes equation (26), thereby considerably improving usuable bandwidth and giving rise to a significant imaging uplift.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: December 28, 2021
    Inventors: Tom Savels, Jan Willem De Maag
  • Patent number: 11169293
    Abstract: Computing device, computer instructions and method for removing cross-talk noise from seismic data and generating an image of a surveyed subsurface. The method includes receiving input seismic data D generated by firing one or more seismic sources so that source energy is overlapping, and the input seismic data D is recorded with seismic sensors over the subsurface; generating a cross-talk noise model N by replacing at least one original shot gather with a reconstructed shot gather; subtracting the cross-talk noise model N from the input seismic data D to attenuate coherent cross-talk noise to obtain processed seismic data Dp; deblending the processed seismic data Dp with a deblending algorithm to attenuate a residual noise to obtain deblended seismic data Dd; and generating the image of the subsurface based on the deblended seismic data Dd.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: November 9, 2021
    Assignee: CGG SERVICES SAS
    Inventors: Thomas Elboth, Jamshade Khan, Honglei Shen, Tran Thinh To
  • Patent number: 11150368
    Abstract: The present disclosure describes methods and systems for interpreting geological features in a seismic volume based on mono-frequency filtering of the seismic volume. One computer-implemented method includes receiving a seismic data volume, decomposing the seismic data volume into multiple sub-volumes, generating one or more seismic horizons on each sub-volume, analyzing the generated seismic horizons for the multiple sub-volumes including determining a first sub-volume and a second sub-volume from the multiple sub-volumes, and subtracting the generated one or more seismic horizons for the first sub-volume from the generated one or more seismic horizons for the second sub-volume.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: October 19, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Mohammed Saleh Bin Gubair, Maher Al Marhoon
  • Patent number: 11137507
    Abstract: The present invention discloses a near-sea-bottom hydrate detection system, which includes a ship-borne part and a deep-towing part. The ship-borne part includes: a comprehensive monitoring host, configured to send an acquisition triggering pulse signal, and transmit the signal to the deep-towing part; and receive near-sea-bottom information acquired by the deep-towing part, and determine a near-sea-bottom condition according to the near-sea-bottom information.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 5, 2021
    Assignee: The First Institute of Oceanography, SOA
    Inventors: Baohua Liu, Yanliang Pei, Kaiben Yu, Yifan Huang, Zili Chen, Guangming Kan, Yanhong Lian, Keping Yan, Chunlei Jing, Le Zong
  • Patent number: 11079511
    Abstract: A system for processing DAS VSP surveys is provided. The system includes a DAS data collection system coupled to at least one optical fiber at least partially positioned within a wellbore and configured to either activate or passively listen to a seismic source of energy for one or more times. The system further includes an information processing system connected to the DAS data collection system. A seismic dataset is received from the DAS data collection system recorded in a spatiotemporal domain. The seismic dataset is converted into intercept-time ray-parameter domain dataset. Local apparent slope is determined for each seismic signal in the received seismic dataset. Amplitude correction is performed for the received seismic signals by using the slowness profile and the determined local apparent slope in the intercept-time ray-parameter domain dataset. The corrected intercept-time ray-parameter domain dataset is converted back into the spatiotemporal domain.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: August 3, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Xiang Wu, Mark Elliot Willis, Andreas Ellmauthaler
  • Patent number: 10996358
    Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for image-guided velocity interpolation using a mask cube. One computer-implemented method includes generating a 3D array of velocities, generating a mask for the 3D array of velocities, each value in the 3D array of velocities associated with a corresponding value in the mask, calculating a 3D array of diffused velocities by applying structure oriented smoothing to the 3D array of velocities, calculating a diffused mask by applying the structure oriented smoothing to the mask, and calculating interpolated velocity values based on the 3D array of diffused velocities and the diffused mask.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: May 4, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Lei Cao, Jiarui Yang, Xiongwen Wang, Yi Luo
  • Patent number: 10983236
    Abstract: Post-stack seismic data is received. Transformed seismic data is created from the received post-stack seismic data, including performing a super-resolution radon transform on the post-stack seismic data. Signal and noise regions are separated using the transformed seismic data, including using a defined muting function to remove unwanted noise. An inverse radon transform is performed using the separated signal and noise regions, outputting only signals.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: April 20, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Yue Ma, Yi Luo
  • Patent number: 10935680
    Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for generating geophysical images.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: March 2, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Constantinos Tsingas, Young Seo Kim, Woodon Jeong
  • Patent number: 10877174
    Abstract: A technique for estimating a depth of investigation of a seismic survey includes in various aspects a method and an apparatus. The method is for use in seismic exploration and includes: forward modeling on a subsurface attribute model of a subterranean region to generate a set of low frequency seismic data, the subsurface attribute model being generated from data representative of the subterranean region; performing a reverse time migration on the low frequency seismic data to obtain a plurality of gathers with large opening angles; stacking the gathers to yield a diving wave illumination image; and estimating a full-waveform inversion depth of investigation from the diving wave illumination image. The apparatus may include a computing apparatus programmed to perform the method and/or a program storage medium encoded with computing instructions that, when executed, perform the method.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 29, 2020
    Assignee: BP Corporation North America Inc.
    Inventor: Imitaz Ahmed
  • 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
    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: 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: 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: 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: 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: 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: 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
    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: 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: 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
    Inventors: Cameron A Snow, James A Ruiz
  • 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
    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
    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
    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
    Inventors: Gordon Poole, Sergio Grion