Signal Analysis And/or Correction Patents (Class 367/38)
  • Patent number: 11313216
    Abstract: Real-time data of drilling operations may be utilized to automatically fingerprint and evaluate their values to create enhanced information of interest. Enhanced information of interest may be comparable to given procedure and may facilitate generation of actionable insight and validation of procedural compliance. Real-time data of drilling operations may be analyzed to generate analysis and graphical comparison of specific sub-step operations that make up activities of interest. These operations may correspond to specific actions a driller on a rig may take to manipulate equipment and may be documented as procedural steps.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: April 26, 2022
    Assignee: Chevron U.S.A. Inc.
    Inventors: Vladimir Crkvenjakov, Benjamin Ames Leonard, Ian S. Smith, Kevin Kaczorowski
  • Patent number: 11255988
    Abstract: A long offset land seismic survey spread includes a plurality of sensors within an area thereby defining a sensor receiver patch, a plurality of long offset sensor receivers outside of the receiver patch thereby surrounding the receiver patch and defining a sensor long offset area that is fee from sensor receivers that also defines a distance separating an external border of the sensor receiver patch and the long offset sensor receivers being a minimum offset distance that is a long offset distance.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: February 22, 2022
    Assignee: WesternGeco L.L.C.
    Inventors: Nicolae Moldoveanu, Maurice Nessim
  • Patent number: 11243322
    Abstract: Seismic survey data is received, indexed into index sets, and each index set partitioned into data blocks. For each particular data block of a particular index set, the particular data block is sliced into frequency slices. For each particular frequency slice of the particular data block, the particular frequency slice is processed to remove random and erratic noise by: forming a Hankel matrix from the particular frequency slice: determining an optimal rank for the Hankel matrix, determining a clean signal and erratic noise from the ranked Hankel matrix, and returning the clean signal and erratic noise for the particular frequency slice. A clean signal is assembled from the index sets.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: February 8, 2022
    Assignee: Saudi Arabian Oil Company
    Inventors: Weichang Li, Ke Chen
  • Patent number: 11227372
    Abstract: Prestack images from the object store are hierarchically combined to generate a hierarchically stacked image. The hierarchically stacked image is generated by combining stacked images that includes a stacked image. The stacked image is generated by combining at least the prestack images. Based at least on the hierarchically stacked image, a quality measure of a prestack image is generated. Prior to deleting at least a subset of the prestack images from the object store and based at least on the quality measure, the prestack images are further combined to generate an enhanced stacked image. The stacked image is substituted using the enhanced stacked image. Subsequent to the substituting and prior to deleting at least the subset of the stacked images from the object store, the stacked images are combined to generate an enhanced hierarchically stacked image. The enhanced stacked image and the enhanced hierarchically stacked image are generated using failure recovery metadata.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: January 18, 2022
    Assignee: Schlumberger Technology Corporation
    Inventors: Anthony Lichnewsky, Robert Clapp, Carlos Santieri De Figueiredo Boneti, Shashi Menon
  • Patent number: 11221426
    Abstract: A method for deblending seismic signals includes entering as input to a computer recorded signals comprising seismic energy from a plurality of actuations of one or more seismic energy sources. A model of deblended seismic data and a blending matrix are initialized. A blending matrix inversion is performed using the initialized model. The inversion includes using a scaled objective function. The inversion is constrained by a thresholding operator. The thresholding operator is arranged to recover coefficients of the model of the deblended seismic data that are substantially nonzero, against a Gaussian white noise background. The thresholded model is projected into data space. Performing the blending matrix inversion is repeated if a data residual exceeds a selected threshold and the inversion is terminated if the data residual is below the selected threshold. At least one of storing and displaying an output of the blending matrix inversion is performed when the blending matrix inversion is terminated.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: January 11, 2022
    Assignee: DownUnder GeoSolutions Pty Ltd.
    Inventors: Amarjeet Kumar, Gary Hampson, Troy A. Thompson
  • Patent number: 11215725
    Abstract: Disclosed are methods, systems, and computer-readable medium for a full seismic wavefield de-aliasing workflow. To achieve the de-aliasing, the workflow employs a four-dimension (4D) anti-leakage anti-aliasing regularization algorithm. The workflow involves application of successive de-aliasing steps while restricting computations only to the significant spatial dimensions. In areas of strong elastic property variation in the near-surface, the benefit of de-aliasing the full wavefield is both significant and demonstrable. In addition to achieving de-aliased sampling of the full wavefield, the workflow reduces the complexity of both the computational and geophysical aspects of the problem of de-aliasing full wavefields.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: January 4, 2022
    Assignee: Saudi Arabian Oil Company
    Inventors: Pierre Leger, Fuhao Qin
  • Patent number: 11215721
    Abstract: PP and PS seismic data are jointly inverted in a stratigraphic grid, using different time axes for PP and PS reflections. A ratio of PP and of PS waves'travel times inside a same layer cell maintained to be a function of a ratio of a P-wave propagation velocity and of an S-wave propagation velocity therein. Since PP and PS seismic amplitudes and travel times are due to elastic properties of the same structure, they can be inverted at the same time to provide better estimates of these elastic properties.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: January 4, 2022
    Assignee: CGG SERVICES SAS
    Inventor: Benjamin Roure
  • Patent number: 11169292
    Abstract: The present disclosure includes a method for combining controlled and uncontrolled seismic data. The method includes accessing one or more controlled signals, each controlled signal associated with a respective receiver of a plurality of receivers. The method also includes accessing one or more uncontrolled signals, each uncontrolled signal associated with a respective receiver of the plurality of receivers. The method also includes generating one or more reconstructed signals based on the one or more uncontrolled signals. The method also includes generating a composite image based at least on the one or more controlled signals and the one or more reconstructed signals. The present disclosure may also include associated systems and apparatuses.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: November 9, 2021
    Assignee: SERCEL SAS
    Inventors: Julien Cotton, Florian Duret, Eric Forgues
  • Patent number: 11092709
    Abstract: Seismic shot gather data is received from a computer data store for processing. The received seismic shot gather data is separated into downgoing and upgoing wavefields, a time-frequency-wavenumber (t-f-k) three-dimensional (3D) data cube comprising multiple time-frequency (t-f) slices is formed. The downgoing wavefields are wavelet transformed from a time (t) domain to a t-f domain and the upgoing wavefields are wavelet transformed from the t domain to the t-f domain. A wavelet cross-correlation is performed between the downgoing wavefields in the t-f domain and the upgoing wavefields in a t-f-k domain to generate wavelet cross-correlated data. Soft-threshold filtering if performed for each t-f slice of the t-f-k 3D data cube. An inverse wavelet transform is performed to bring wavelet cross-correlated data from the t-f-k domain to a time-receiver (t-x) domain.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: August 17, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Yang Zhao, Weichang Li
  • Patent number: 11073631
    Abstract: A surface-consistent refraction analysis automatically derives near surface corrections during seismic data processing. Residual time lags are evaluated in multiple CMP-offset-azimuth bins by similarity analysis with a pilot trace where a correlation window is centered at the refracted arrival. The similarity analysis may take the form of computerized cross-correlation, or other criteria such as semblance. The residuals are then used to build a system of linear equations that is simultaneously inverted for surface-consistent shot and receiver time shift corrections plus a possible subsurface residual term. The refraction analysis steps are completely automated and require a fraction of the time needed for conventional near surface analysis.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: July 27, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Daniele Colombo, Federico Miorelli
  • Patent number: 10976459
    Abstract: A surface-consistent refraction analysis automatically derives near surface corrections during seismic data processing. Residual time lags are evaluated in multiple CMP-offset-azimuth bins by similarity analysis with a pilot trace where a correlation window is centered at the refracted arrival. The similarity analysis may take the form of computerized cross-correlation, or other criteria such as semblance. The residuals are then used to build a system of linear equations that is simultaneously inverted for surface-consistent shot and receiver time shift corrections plus a possible subsurface residual term. The refraction analysis steps are completely automated and require a fraction of the time needed for conventional near surface analysis.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: April 13, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Daniele Colombo, Federico Miorelli
  • Patent number: 10977396
    Abstract: A technique includes determining at least one impulse response of a modeling and migration of at least one point scatterer in a target structure and based at least in part on the impulse response(s) and a reflection amplitude image, determining a model for at least part of the target structure.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: April 13, 2021
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Stewart Archer, Robin Fletcher, Weijian Mao, David Nichols
  • Patent number: 10969508
    Abstract: Systems and methods to correct misties across multiple 2D seismic surveys using a correction solution calculated based only on the intersecting points between different surveys.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: April 6, 2021
    Assignee: Landmark Graphics Corporation
    Inventors: Nam Xuan Nguyen, William John May, Eugene Carey Heinrichs
  • Patent number: 10928532
    Abstract: A method includes receiving data indicative of outputs of first and second seismic sensors. The outputs include components corresponding to the detection by the first and second seismic sensors of first and second seismic signals. In addition, the method includes identifying, relative to a first clock in the first seismic sensor, a first time associated with a time of arrival of the first seismic signal at the first seismic sensor, and a second time associated with a time of arrival of the second seismic signal at the first seismic sensor. Further, the method includes identifying, relative to a second clock in the second seismic sensor, a third time associated with a time of arrival of the first seismic signal at the second seismic sensor, and a fourth time associated with a time of arrival of the second seismic signal at the second seismic sensor. Still further, the method includes determining an offset of the first clock relative to the second clock using the first, second, third and fourth times.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: February 23, 2021
    Assignee: BP EXPLORATION OPERATING COMPANY LIMITED
    Inventor: John Gerard Bouska
  • Patent number: 10928534
    Abstract: A method of subsurface exploration includes generating a representation of a portional volume of the Earth from a seismic measurement of a physical parameter.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: February 23, 2021
    Assignee: Imperial Innovations Limited
    Inventors: Mike Warner, Lluis Guasch Batalla
  • Patent number: 10884149
    Abstract: A method is described for a manner of geologic analysis using seismic data. The method includes steps to produce improved amplitude versus angle (AVA) information that may be used for analysis of geologic features of interest including estimation of pore fluid content. The method assesses the probability of hydrocarbons in a subterranean reservoir based on seismic amplitude variations along offsets or angles for portions of a seismic horizon. The method may be executed by a computer system.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: January 5, 2021
    Assignee: Chevron U.S.A. Inc.
    Inventor: James R. Magill
  • Patent number: 10884148
    Abstract: A method of geophysical exploration in a seismic survey includes acquiring a set of seismic traces based on seismic data obtained by a seismic receiver, responsive to seismic energy reflected from a subsurface geology. Additional steps include performing reverse time migration on the seismic traces using a velocity model that represents velocity of the seismic energy propagating through the seismic medium. The migrated gathers have an amplitude based at least in part on the migration, which can be corrected by computing synthetic seismograms to provide compensated gathers. Amplitude versus offset and/or amplitude versus angle analysis can be performed on the compensated gathers, in order to generate a seismic image of subsurface structures in the survey area.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: January 5, 2021
    Inventors: Carlos Calderón, Ivan Berranger, Wei Huang, David Brookes, Guoquan Chen, Gary Martin
  • Patent number: 10862755
    Abstract: Techniques herein partition data using data repartitioning that is store-and-forward, content-based, and phasic. In embodiments, computer(s) maps network elements (NEs) to grid points (GPs) in a multidimensional hyperrectangle. Each NE contains data items (DIs). For each particular dimension (PD) of the hyperrectangle the computers perform, for each particular NE (PNE), various activities including: determining a linear subset (LS) of NEs that are mapped to GPs in the hyperrectangle at a same position as the GP of the PNE along all dimensions of the hyperrectangle except the PD, and data repartitioning that includes, for each DI of the PNE, the following activities. The PNE determines a bit sequence based on the DI. The PNE selects, based on the PD, a bit subset of the bit sequence. The PNE selects, based on the bit subset, a receiving NE of the LS. The PNE sends the DI to the receiving NE.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 8, 2020
    Assignee: Oracle International Corporation
    Inventors: Aarti Basant, Sam Idicula, Nipun Agarwal
  • Patent number: 10860197
    Abstract: Techniques for processing multi-source traces from computing systems are disclosed. One example technique includes receiving a user command to align a first event from a first trace to a second event from a second trace. The first trace has a first anchor event temporally aligned with a second anchor event of the second trace. The technique also includes setting a time in a timestamp of the first anchor event as a base time, calculating first and second differences between times in timestamps of the first and second events relative to the base time, respectively, deriving a ratio between the first difference and the second difference, and scaling time intervals between adjacent events of the second trace using the derived ratio such that the second event from the second trace is temporally aligned with the first event of the first trace while the first and second anchor events remain temporally aligned.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: December 8, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Tristan Charles Gibeau, Kaiyi Zhang
  • Patent number: 10824319
    Abstract: Techniques for processing multi-source traces from computing systems are disclosed. One example technique includes receiving a user command to align a first event from a first trace to a second event from a second trace. The first trace has a first anchor event temporally aligned with a second anchor event of the second trace. The technique also includes setting a time in a timestamp of the first anchor event as a base time, calculating first and second differences between times in timestamps of the first and second events relative to the base time, respectively, deriving a ratio between the first difference and the second difference, and scaling time intervals between adjacent events of the second trace using the derived ratio such that the second event from the second trace is temporally aligned with the first event of the first trace while the first and second anchor events remain temporally aligned.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: November 3, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Tristan Charles Gibeau, Kaiyi Zhang
  • Patent number: 10809401
    Abstract: The present application provides a method and device for determining overall metrics of seismic geometry repeatability, wherein the method comprises: selecting baseline geometry and monitor geometry; matching shot-receiver pairs of the baseline geometry with shot-receiver pairs of the monitor geometry to obtain multiple matching relationships; calculating overall geometry repeatability of each of the multiple matching relationships according to a predetermined calculation formula for multi-trace geometry repeatability, to obtain overall geometry repeatabilities corresponding to the multiple matching relationships; taking the minimum value among the overall geometry repeatabilities corresponding to the multiple matching relationships as overall repeatability metrics between the monitor geometry and the baseline geometry.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: October 20, 2020
    Assignees: CHINA NATIONAL PETROLEUM CORPORATION, BGP INC., CHINA NATIONAL PETROLEUM CORPORATION
    Inventors: Fengshu Dong, Haiyan Quan, Minxue Luo, Chaohong Xu, Xiuyan Xin, Yuehong Jing
  • Patent number: 10754051
    Abstract: Systems and methods of performing a seismic survey are described. The system can receive seismic data in a first domain, and transform the seismic data into a tau-p domain. The system can identify a value on an envelope in the tau-p domain, select several values on the tau-p envelope using a threshold, and then generate a masking function. The system can combine the masking function with the tau-p transformed seismic data, and then perform an inverse tau-p transform on the combined seismic data. The system can adjust amplitudes in the inverse tau-p transformed combined seismic data, and identify one or more coherent events corresponding to subsea lithologic formations or hydrocarbon deposits.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: August 25, 2020
    Assignee: Magseis FF LLC
    Inventors: Josef Paffenholz, Kenneth L. Craft
  • Patent number: 10739483
    Abstract: The present disclosure is related to absolute strength and absolute sensitivity in seismic data. Seismic data from a marine survey can be received. The seismic data can be calibrated based on an absolute strength of a seismic source and an absolute sensitivity of a seismic receiver. The calibrated seismic data can be processed.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: August 11, 2020
    Assignee: PGS Geophysical AS
    Inventors: John W. C. Sherwood, Kevin J. S. Sherwood
  • Patent number: 10656300
    Abstract: A method of estimating electromagnetic parameters of a geological structure, comprising: providing controlled source electromagnetic, CSEM, data of the structure, calculating a numerical model representing electromagnetic parameters of the structure and generating simulated CSEM data, discretising the numerical model based on prior knowledge of the structure, defining a functional for minimising the distance between said simulated CSEM data and said CSEM data, wherein the functional comprises a regularisation term which depends on prior knowledge of said structure.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: May 19, 2020
    Assignee: STATOIL PETROLEUM AS
    Inventors: Torgeir Wiik, Eirik Øverland Dischler, Janniche Iren Nordskag, Anh Kiet Nguyen
  • Patent number: 10656294
    Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for generating a velocity model for a subsurface area.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: May 19, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Constantinos Tsingas, Wooden Jeong, Young Seo Kim
  • Patent number: 10649108
    Abstract: System and method for generating discrete dithering sequences DSi for marine seismic sources Si in a marine acquisition system. The method includes determining a number N of the seismic sources Si to be fired; calculating a dithering sequence DSi for each source Si such that when any two consecutive source activation Sk and Sl, where l=k+1, are selected, a combination DSkl of their dithering sequences DSk and DSl is a uniform random low-discrepancy sequence; and driving each source Si with the corresponding dithering sequence DSi to generate blended seismic data.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: May 12, 2020
    Assignee: CGG SERVICES SAS
    Inventors: Thomas Elboth, Vetle Vinje
  • Patent number: 10634805
    Abstract: A method is described for predicting fault seal based on a digital seismic image including defining a fault coordinate system locally parallel and perpendicular to the at least one fault surface; extracting seismic amplitudes from a sub-volume surrounding and containing the at least one fault surface and mapping the seismic amplitudes in the fault coordinate system; performing trace fitting of the seismic amplitudes along directions locally perpendicular to the fault surface to separate the fault seismic signal from other seismic energy; comparing the fault seismic signal derived from trace fitting to at least one of natural analogs and synthetic models of seismic response to generate a predicted fault seal; and identify geologic features based on the predicted fault seal. The method may be executed by a computer system.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: April 28, 2020
    Assignee: Chevron U.S.A. Inc.
    Inventors: Huafeng Liu, Donald Arthur Medwedeff
  • Patent number: 10635759
    Abstract: A system, method, and computer program configured to provide an electronic method for seismic time-lapse characterization of an underground formation are provided. The method includes decomposing, with microprocessor executing a predefined set of instructions stored in a memory, baseline and monitor seismic survey data of a formation into a four dimensional Clifford Algebraic form; extracting, via the microprocessor, time delays from a matrix of decomposed sensor measurement vectors generated based on the four dimensional Clifford Algebra form; and determining, via the processor, time strains for the underground formation from differences in the extracted time delays from the matrix before displaying the determined time strains for the underground formation to a user via a monitor or a hard copy printed document. A procedure is also provided to calibrate and refine the static and dynamic models of an underground formation using the results from the seismic time-lapse characterization.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: April 28, 2020
    Assignee: GEOSCAPE ANALYTICS, INC.
    Inventor: Elan Yogeswaren
  • Patent number: 10628552
    Abstract: A method includes generating a faulted point cloud representing a faulted geological formation including a first fault block having a first surface, a second fault block having a second surface, and a fault formed therebetween and having a fault surface, generating a first fault trace from an intersection of the first surface and the fault surface and a second fault trace from an intersection of the second surface and the fault surface, generating a first fault polygon using the first and second fault traces, generating a center polyline, generating third and fourth fault traces separated from the first and second fault traces, respectively, generating a second fault polygon using the third and fourth fault traces, expanding a first area including the first and third fault traces, expanding a second area including the second and fourth fault traces, and generating an unfaulted point cloud representing an unfaulted geological formation.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: April 21, 2020
    Assignee: LANDMARK GRAPHIC CORPORATION
    Inventors: Genbao Shi, Jeffrey Marc Yarus, Zitao Xu, Maurice Gehin
  • Patent number: 10620341
    Abstract: A method is described for modifying an earth model including receiving an earth model containing one or more surfaces with surface geometries, such that at least two surface depth locations exist for some horizontal positions; perturbing elastic properties within the earth model; and generating a modified earth model by modifying the surface geometries within the earth model while preserving seismic travel times of the earth model such that after an initial user parameterization all updates of the surfaces are done without additional user input. The method may be executed by a computer system.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: April 14, 2020
    Assignee: Chevron U.S.A. Inc.
    Inventors: Daniel P. Johnson, Konstantin Osypov
  • Patent number: 10620331
    Abstract: A method, including: obtaining Earth models including velocity, anisotropy, and attenuation reconstructing a source wavefield using the Earth models; reconstructing a receiver wavefield using the Earth models, wherein the reconstructing the source wavefield and the receiver wavefield each include applying an attenuation operator that increases an amplitude of down-going wavefields within an attenuation body and that decreases an amplitude of up-going wavefields within the attenuation body; applying an imaging condition to the source wavefield and receiver wavefield for a plurality of shots; and generating a subsurface image by stacking images for the plurality of shots.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: April 14, 2020
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Junzhe Sun, Jia Yan
  • Patent number: 10615869
    Abstract: A physical voxel, a volumetric testbed, and method for physically simulating a photonic device are described herein. The volumetric testbed comprises a simulation stage and a controller. The simulation stage includes a three-dimensional array of a physical voxels configurable to represent the photonic device operating in response to electromagnetic radiation. The physical voxels includes a field detector to measure a local field response and an impedance adjuster to adjust an impedance to the electromagnetic radiation. The controller is coupled to memory which stores instructions that when executed by one or more processors included in the controller causes the volumetric testbed to perform operations including determining a global field response of the photonic device and adjusting the impedance of the physical voxels to refine a design of the photonic device.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: April 7, 2020
    Assignee: X Development LLC
    Inventor: Brian Adolf
  • Patent number: 10557954
    Abstract: The present disclosure describes methods and systems, including computer-implemented methods, computer program products, and computer systems, for modeling angle domain common image gathers (ADCIG) from reverse time migration (RTM). One computer-implemented method includes calculating seismic source and receiver wavefields based on seismic data, calculating characteristic source and receiver wavefields from the seismic source and receiver wavefields, calculating propagation angles for the characteristic source and receiver wavefields, applying a wavefield decomposition algorithm on the characteristic source and receiver wavefields to obtain corresponding directional source and receiver wavefields, the wavefield decomposition algorithm decomposing wavefield amplitude of a wavefield in an angle interval centered on a propagation angle of the wavefield, and forming ADCIG by applying an image condition to the obtained directional source and receiver wavefields.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: February 11, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Thierry-Laurent Dominique Tonellot, Vincent Etienne
  • Patent number: 10520622
    Abstract: A method for estimating surface waves generates incident, back-scattered, virtual back-scattered and super-virtual back-scattered traces. The stacked super-virtual back-scattered traces are an estimate of the surface waves.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: December 31, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Corentin Chiffot
  • Patent number: 10521524
    Abstract: A method is described in which a polyhedral grid representative of seismic data is provided. A polyhedral cell of the polyhedral grid is identified. A polyhedron that encloses the polyhedral cell is created. A region of the polyhedron to remove based on faces of the identified polyhedral cell is identified. The identified region of the polyhedron is removed. The identifying and removing are repeated for a plurality of faces of the identified polyhedral cell. A pressure center of the polyhedral cell is determined.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: December 31, 2019
    Assignee: Schlumberger Technology Corporation
    Inventor: Thomas Lucas Viard
  • Patent number: 10502851
    Abstract: A method and apparatus for determining marine seismic source configurations which produce a minimum error after the process of combining the wave fields to eliminate the responses of sources including the source ghost operated at multiple depths, without separating these wave fields, is disclosed. In one embodiment, a method includes simulating, on a computer system, the performing of a seismic survey for one or more source configurations. An error term is calculated for each configuration simulated. Based on the calculated error terms, a configuration having the smallest error among those simulated may be determined.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: December 10, 2019
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Gregg Parkes, Fabien Julliard
  • Patent number: 10466376
    Abstract: Methods and systems for deriving S-wave velocity information from the low-frequency content of ambient noise are described. The ambient noise can be collected on a dedicated record or on a production record associated with the receivers of a three-dimensional seismic survey. The methods and systems use one of a plurality of analysis models selected based on quality factors of the ambient noise data. The methods and systems analyze the data at a plurality of single frequencies then transform the velocity versus frequency data into velocity versus depth data.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: November 5, 2019
    Assignee: CGG SERVICES SAS
    Inventors: Julien Meunier, Thomas Bianchi, Fabien Espeute
  • Patent number: 10436926
    Abstract: Marine survey data resulting from a first signal comprising a signal representing a flat spectral far-field pressure generated by a marine vibrator source swept over a frequency range according to a time function of motion such that acceleration of the marine vibrator source is a flat function in a frequency domain can be used to improve full waveform inversion. For example, full waveform inversion can be performed using the marine survey data received from the first signal and from a second signal generated by an impulsive seismic source to estimate a physical property of a subsurface location.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: October 8, 2019
    Assignee: PGS Geophysical AS
    Inventors: Walter F. Söllner, Okwudili Orji
  • Patent number: 10429529
    Abstract: A method for adaptively determining one or more faults from geological survey data includes: (a) generating at least one attribute volume comprising a plurality of attributes from said geological survey data; (b) identifying at least one region of interest on a predetermined cross-section of said at least one attribute volume; (c) adding at least one seed to said at least one region of interest; (d) defining at least one representative area in accordance with said region of interest; (e) starting an initial generation of at least one basic geological object by adapting said at least one seed and/or representative area; (f) selectively determining growth confidence levels for any of said at least one basic geological object based on a realistic geological principles, and mapping said at least one basic geological object with colour-coded data of said growth confidence levels; (g) monitoring a visual representation of said at least one basic geological object during said initial generation; (h) selectively stop
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: October 1, 2019
    Assignee: Foster Findlay Associates Limited
    Inventors: Stephen Purves, James Lowell, Dale Norton, Jonathan Henderson, Gaynor Paton, Nicholas McArdle
  • Patent number: 10401516
    Abstract: Computing systems, computer-readable media, and methods for seismic processing. The method includes receiving seismic data including acquired seismic waveforms that were acquired from a seismic receiver and represent a subterranean area, generating synthetic waveforms based on an initial model of the subterranean area, determining a model error by minimizing a local travel time shift error between one or more of the acquired seismic waveforms and one or more of the synthetic waveforms, and adjusting the initial model based on the model error to generate an adjusted model.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: September 3, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Kun Jiao, Dong Sun, Xin Cheng, Denes Vigh
  • Patent number: 10379247
    Abstract: A method for estimating formation slowness is provided. The method comprises forward modeling to compute formation slownesses based on a first method for orthorhombic media using stress magnitudes and third-order elastic constants as inputs, and forward modeling to determine formation slownesses analytically based on a second method using stress magnitudes, stress azimuth and third-order elastic constants as inputs. The first method may be based on Tsvankin method and the second method may be based on Christoffel method. The forward modeling may further use well configuration and reference moduli as inputs, and the results from the forward modeling may include formation slownesses, and at least one of vertical slownesses, anisotropic parameters, anellipticity indicators and fast shear azimuth. The method may further comprise assessing quality of the forward modeling based on results output from the forward modeling.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: August 13, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Mitsuko Kitazawa, Henri-Pierre Valero, Takeshi Endo, John Adam Donald, Erik Wielemaker
  • Patent number: 10371841
    Abstract: A computing device, computing medium and method for generating an image of a tilted orthorhombic medium. The method includes receiving seismic data related to the tilted orthorhombic medium; calculating a wave propagation with a processing device by applying a second-order equation for reverse time migration to the seismic data to generate a tilted orthorhombic wave propagation; and generating the image of the tilted orthorhombic medium based on the tilted orthorhombic wave propagation.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: August 6, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Yu Zhang
  • Patent number: 10365388
    Abstract: A method for use in surveying a subsurface region beneath a body of water by detecting S waves propagating through the subsurface region. The method comprises using a first sensor configuration to detect mixed S and P waves on or in the subsurface region, using a second sensor configuration located on or in relatively close proximity to the subsurface region to detect P waves in the water, and using the P waves detected in the water to compensate the detected mixed S and P waves, and thereby attenuate the effects of P waves in the mixed S and P waves.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: July 30, 2019
    Assignee: STATOIL PETROLEUM AS
    Inventors: Harald Westerdahl, Mark Thompson, Lasse Amundsen
  • Patent number: 10365390
    Abstract: Systems and methods for acquiring and processing electromagnetic data in subsurface formations. In one example, a system includes an electromagnetic source, a plurality of electromagnetic receivers, and an electromagnetic data processor. The electromagnetic source is configured to generate an electromagnetic pulse that induces electromagnetic energy in subsurface formations. The electromagnetic receivers are configured to detect the electromagnetic energy reflected by the subsurface formations, and to output signals corresponding to detected electromagnetic energy reflected by the subsurface formations. The electromagnetic data processor configured to process, based on differences in travel times of the electromagnetic energy between the subsurface formations and the electromagnetic receivers, the signals output by the electromagnetic receivers.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: July 30, 2019
    Assignee: UNIVERSITY OF HOUSTON SYSTEM
    Inventors: John W. Neese, Leon Thomsen
  • Patent number: 10345464
    Abstract: Methods and systems for processing seismic data for improving an image of a surveyed subsurface. The method includes receiving seismic data associated with the surveyed subsurface; applying a multi-layer non-linear slope tomography algorithm to iteratively calculate a new boundary of a first layer of the surveyed subsurface and to calculate a velocity attribute of a second layer of the surveyed subsurface; and generating an improved image of the surveyed subsurface based on the new boundary of the first layer and the velocity attribute of the second layer.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: July 9, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Patrice Guillaume
  • Patent number: 10345463
    Abstract: Embodiments of using known source locations in seismic data processing are disclosed. In one embodiment, a method of locating a seismic event includes receiving location information for a plurality of known source events proximate the seismic event, and determining an estimated location of the seismic event using a relative locator constrained by the location information for the plurality of known source events.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: July 9, 2019
    Assignee: ION Geophysical Corporation
    Inventors: Daniel S. Kahn, Jacques P. Leveille
  • Patent number: 10338245
    Abstract: The present disclosure includes a method including determining a spatial region for analysis and selecting a segment of time for analysis, analyzing and correcting a plurality of traces from a plurality of receivers using an iterative non-linear inversion algorithm, wherein each iteration of the non-linear algorithm corrects the plurality of traces using at least one set of parameters defining a microseismic event, determining whether a final stack value of the plurality of traces corrected based on the at least one set of parameters of a final iteration of the iterative non-linear inversion algorithm exceeds a predetermined threshold and upon a determination that the final stack value exceeds the predetermined threshold, detecting a microseismic event defined by the at least one set of parameters of final iteration. The present disclosure also includes associated systems and computer-readable media.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: July 2, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Thomas Bardainne
  • Patent number: 10324206
    Abstract: Disclosed is a method monitoring changes in saturation of a subsurface volume. The method comprises: obtaining observed data of saturation behavior from the subsurface volume over time; using one or more models, obtaining simulated data of saturation behavior from the subsurface volume over time; and transforming each of the observed data and simulated data.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: June 18, 2019
    Assignee: Total S.A.
    Inventors: Pierre Bergey, Anahita Abadpour
  • Patent number: 10317547
    Abstract: Various implementations described herein are directed to methods for processing seismic data, including estimating a spectral noise power of multi-measurement seismic data received from a multi-dimensional seismic sensor array having multiple seismic sensors. The methods may include receiving a shot record of multi-measurement seismic data in time-domain, partitioning the shot record into overlapping time-space windows, and computing a frequency-domain spectrum for each time-space window. The methods may include computing a signal presence probability for each time-space window using the frequency-domain spectrum and prior probabilities of signal presence and absence for each time-space window.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: June 11, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Yousif Izzeldin Kamil Amin, Pradeep Loganathan
  • Patent number: 10319143
    Abstract: Method for generating a 3D grid, and for defining a material property model on the grid, to use, for example, in a reservoir simulator. A mapping is defined (61,71) to a design space in which the material property is described as a piecewise smooth implicit or explicit function in three dimensions. Grid geometry is constructed only in the physical space of the model (62-65, 73-76), and no grid is required in the design space. The material property, for example permeability, is sampled in the design space (66,77) to populate the cells in the grid constructed in the physical domain. Prismatic grid cells may be truncated based on faults and horizons (65), or maybe conformed to fault surfaces using a 3D parameterization of the model (76). Only forward mapping, i.e. from the physical domain to the design space, is required.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: June 11, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Larisa V. Branets, Valeriy Kubyak, Elena Kartasheva, Valeriy Shmyrov, Olga Kroshkina, Dmitry Kandybor, Xiao-Hui Wu