Velocity Of Seismic Wave Patents (Class 702/18)
  • Patent number: 10598818
    Abstract: This invention relates to a method for determining a location of karst caves in a geological model. The method comprising for each current point of a set of points of a closed space of the model, determining a distance value; receiving an average value; and for each current point of the set of points of the closed space, determining a presence of caves for the current point. The determination at the presence of caves depends at least on the received average value and on the distance value determined for the current point. A collapse procedure can also be implemented as described in the description.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: March 24, 2020
    Assignee: TOTAL SA
    Inventors: Pierre Biver, Richard Labourdette
  • Patent number: 10438012
    Abstract: The present disclosure generally relates to an interface system and method of interfacing to generate data compatible with an external system in an oil and gas asset supply chain, and in particular to an interface and interface method for generating secure and verifiable data to prevent tampering, injection of unwanted data resulting from an unauthorized access along a supply chain. An interface generates and transforms data in an oil and gas supply chain for compatibility with external systems. Collected data is captured by an industrial control system sensor or data collector, which is transferred in a secure intermediary hardware platform to interface with a software component. The collected data is then modified using a business rules engine to create enhanced data and events created from the enhanced data.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: October 8, 2019
    Assignee: SICPA HOLDINGS SA
    Inventors: Charles Finkel, Mark Campbell, Christophe Van Ngoc Ty, Giorgio Caset
  • Patent number: 10429537
    Abstract: A method of estimating formation parameters in a directional drilling process by acquiring electromagnetic logging while drilling (LWD) measurements over a non-uniform forward modeling grid and inverting, using a pixel-based inversion method, the LWD measurements over a uniform inversion grid. The inversion algorithm may be applied using a sliding window scheme that allows the formation parameters to be estimated independently and in parallel across a plurality of overlapping windows which span the entirety of the inversion grid.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: October 1, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Yun Lin, Aria Abubakar, Tarek M. Habashy
  • Patent number: 10365386
    Abstract: A method is described for improving subsalt seismic imaging using wavefield redatuming. The method redatums the source wavefield and receiver wavefield to the salt surface. It cross-correlates the redatumed wavefields and uses the time cross-correlations to update the salt surface. The method may be executed by a computer system.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: July 30, 2019
    Assignee: Chevron U.S.A. Inc.
    Inventors: Uwe Karsten Albertin, Chaoshun Hu
  • Patent number: 10338244
    Abstract: A method, including performing, with a computer, up/down separation of geophysical data, which produces an approximate up-going wavefield and an approximate down-going wavefield; creating an areal source based at least in part on the down-going wavefield; and performing, with a computer, a full wavefield inversion process with the areal source, and an objective function measuring a misfit between modeled up-going wavefields and recorded up-going wavefields, wherein the full wavefield inversion process generates a final subsurface physical property model.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: July 2, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Anatoly I Baumstein, Di Yang, Tetyana Vdovina, Yaxun Tang
  • Patent number: 10316623
    Abstract: A method for improving a redundancy and an uptime in a SCADA network for controlling a well operation includes executing control systems for the well operation in identical virtual simulated environments on at least two servers, storing all data for the control systems in a designated redundant cluster storage system, and setting-up the at least two servers with a load balancing.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: June 11, 2019
    Assignee: MHWIRTH AS
    Inventors: Jon Rune Fladmark, Marius Kjoelleberg
  • Patent number: 10288755
    Abstract: A method for processing broadband single-sensor single-source land seismic data includes receiving seismic traces, the seismic traces generated using at least one source and at least one receiver; converting the seismic traces from particle motion measured by the at least one receiver to particle motion represented by the at least one source by applying a deterministic differential filtering operation; applying a deterministic inverse-Q filtering operation on the converted seismic traces; processing the inverse-Q filtered seismic traces using a set of surface-consistent filter and attribute corrections; and generating a seismic image based on the processed seismic traces.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: May 14, 2019
    Assignee: Saudi Arabian Oil Company
    Inventor: Simon Cordery
  • Patent number: 10126450
    Abstract: A method for modeling and analyzing the impact of different seismic surveying and imaging techniques on a subterranean formation uses a black hole boundary condition around a particular region in the formation where at least one of the physical characteristics is unclear and may distort the seismic modeling results. The black hole boundary conditions will eliminate any energy wave that enters, exit or reflect off the region so as to avoid any image distortion caused by this region. The resulted image data is compared with the image data obtained without using the black hole boundary conditions to determine the impact of this region, and proper correction can be made to more precisely and accurately model the formation.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: November 13, 2018
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Peter M. Eick, Joel Brewer
  • Patent number: 10126446
    Abstract: The presently disclosed seismic acquisition technique employs a receiver array and a processing methodology that are designed to attenuate the naturally occurring seismic background noise recorded along with the seismic data during the acquisition. The approach leverages the knowledge that naturally occurring seismic background noise moves with a slower phase velocity than the seismic signals used for imaging and inversion and, in some embodiments, may arrive from particular preferred directions. The disclosed technique comprises two steps: 1) determining from the naturally occurring seismic background noise in the preliminary seismic data a range of phase velocities and amplitudes that contain primarily noise and the degree to which that noise needs to be attenuated, and 2) designing an acquisition and processing method to attenuate that noise relative to the desired signal.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: November 13, 2018
    Assignee: BP Corporation North America Inc.
    Inventors: Andrew James Brenders, Joseph Anthony Dellinger, Min Zhou
  • Patent number: 9857489
    Abstract: Disclosed herein is a system and method for building a velocity model for a geographical area of interest (GAI). The system and method comprise determining a ray based tomography velocity image of said GAI using acquired data, determining a high resolution velocity guide (HRVG) image of said GAI, scaling said determined HRVG of said GAI, adding the scaled HRVG to the ray based tomography velocity image to determine an updated ray based tomography velocity image, and determining whether said updated ray based tomography velocity image has experienced convergence by determining whether a cost function of said ray based tomography velocity image does not improve compared to a previously determined cost function value of said ray based tomography velocity image.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: January 2, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Gilles Lambare, Thibaut Allemand
  • Patent number: 9563602
    Abstract: A method of analyzing a 3D geological structure using a structure index. The method includes the steps of estimating physical property values on common coordinates to calculate two or more physical property models on the same 3D grid (L×M×N); normalizing the physical property models, thus obtaining normalized physical property models which are then represented in a scatter plot of physical properties; converting distribution positions of the normalized physical property models on the scatter plot of physical properties into type angle (TA) and into type intensity (TI); determining a minimum of TI values, which classifies two or more classes on a scatter plot of the TA and TI values, to be a threshold; and analyzing the 3D geological structure based on a local extreme point and/or points in the scatter plot for the TA and TI using the threshold.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: February 7, 2017
    Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
    Inventors: Gyesoon Park, Chul-Ho Heo
  • Patent number: 9547233
    Abstract: A technique for determining a set of surface profiles in a multilayer stack during a fabrication process may be determined using a model of this fabrication process, a geometry of the multilayer stack (such as a pre-defined geometry of the multilayer stack) and a surface profile in the multilayer stack (such as a measured surface profile of the top surface or a bottom surface of the multilayer stack). For example, the model of the fabrication process may be based on a generalized Eikonal equation. In conjunction with deposition rates and/or physical properties of the layers in the multilayer stack, deposition or growth of the multilayer stack may be simulated. Based on the determined set of surface profiles, an acceptance condition of the multilayer stack (such as a multilayer stack in a photo-mask for use in extreme ultra-violet photolithography) may be determined and/or a remedial action may be recommended.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 17, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Daniel Ping Peng, Masaki Satake, Changqing Hu
  • Patent number: 9250340
    Abstract: Methods and apparatus for noise removal from seismic data. In one embodiment, a seismic data set comprising a plurality of traces is received, and noise metrics for the seismic data set are computed using a set of time and depth windows. The seismic data set is scanned to determine a first set of groups. Each group in the first set comprises at least a first minimum number of neighboring traces for which at least one of the noise metrics is outside a predefined specification. Noise attenuation is applied to the traces in the first set of groups. Other embodiments, aspects, and features are also disclosed.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: February 2, 2016
    Assignee: PGS Geophysical AS
    Inventors: John Brittan, Paul Lecocq, Andrew Wrench
  • Patent number: 9197533
    Abstract: A technique dynamically maintains and enforces relative policies for a prefix in a computer network. According to the novel technique, a node (e.g., an optimized edge router, OER) monitors performance characteristics for a particular prefix policy over a current path, and maintains a long-term average (LTA) value and a short-term average (STA) value of the performance characteristic. In the event the STA is worse than the LTA by a configurable amount, the prefix is considered “out-of-policy” (OOP) for that policy, and a new path may be selected accordingly. Otherwise, the prefix is considered “in-policy,” and the current path is upheld. Notably, a threshold may be manually configured to account for slow performance deterioration or “spikes,” such that if the performance characteristic (or STA) surpasses the threshold, the prefix is considered OOP.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: November 24, 2015
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Lei Xia, Dana Blair
  • Patent number: 9075161
    Abstract: The illumination/imaging of a theorized target horizon that is below a theorized velocity contrast horizon where the velocity contrast horizon may represent the bottom of a salt dome by assessing the path of seismic energy for critical angle reflection/refraction and tabulates the successful paths and unsuccessful paths. For some subsurface locations, seismic energy will not reach the surface above the velocity contrast due to the shapes of the velocity contrast horizon and target horizon and the velocity model through which the studied waves propagate. Displays may be prepared and used for understanding illumination/imaging of the geology for drilling, reacquisition, and reprocessing to elicit information about subsurface geology that may have been overlooked or ignored. Future surveys avoid expensive surveying which cannot obtain useful seismic data as determined by the velocity contrast for the target locations due to the shapes of the horizons and the velocity model.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: July 7, 2015
    Assignee: ConocoPhillips Company
    Inventors: Jun Cao, Joel D. Brewer, Xianhuai Zhu
  • Patent number: 9053570
    Abstract: A method, apparatus and system for, in a computing system, perturbing an initial three-dimensional (3D) geological model using a 3D vector field. A coherent 3D vector field including 3D vectors may be generated where each 3D vector of the 3D vector field is associated with a node of the initial 3D geological model and has a magnitude within a range of uncertainty of the node of the initial 3D geological model associated therewith. The coherent 3D vector field may be applied to the initial 3D geological model associated therewith to generate an perturbed 3D model. The perturbed 3D model may differ from the initial 3D geological model by a displacement defined by the 3D vector field associated with nodes having uncertain values. The perturbed 3D model may be displayed.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: June 9, 2015
    Assignees: PARADIGM SCIENCES LTD.
    Inventors: Jean-Laurent Mallet, Anne-Laure Tertois
  • 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
  • Publication number: 20150120200
    Abstract: A computer-implemented process includes: performing a first foil waveform inversion on an initial subsurface attribute model using low frequency, known source-signature data and low frequency humming seismic data to generate a first updated subsurface attribute model; and performing a second full waveform inversion on the first updated subsurface attribute model using low-frequency, narrowband sweeping known source-signature data and low-frequency, swept seismic data to generate a second updated subsurface attribute model. The process may be performed by a suitably programmed computing apparatus, the program residing on some form of non-transitory program storage medium.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Applicant: BP CORPORATION NORTH AMERICA INC.
    Inventors: Andrew Brenders, Joseph Anthony Dellinger
  • Patent number: 9013954
    Abstract: A method for determining properties of a formation comprises disposing at least one acoustic logging tool in a well and moving the logging tool along the well. An acoustic logging is performed during movement of the acoustic logging tool together with simultaneous thermal treatment of the formation. A temperature of a formation zone being thermally treated is measured as well as attenuation and velocity of the Stoneley waves excited by the acoustic logging tool. Based on the obtained dependencies of measured parameters as functions of the formation zone temperature formation relative phase permeabilities, formation fluid viscosity and viscous flow activation energy are determined.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: April 21, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Anton Vladimirovich Parshin, Evgeny Nikolaevich Dyshlyuk
  • Patent number: 8995224
    Abstract: Techniques for estimating velocity ahead of a drill bit include generating seismic waves at a surface from at least two different source positions in the vicinity of a borehole, receiving seismic waves reflected from a reflector ahead of the drill bit at one or more locations in the borehole, determining travel times of the seismic waves received at the one or more locations in the borehole, and inverting the travel times to determine a velocity of a formation ahead of the drill bit. One embodiment includes transforming the velocity into pore pressure of the formation.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: March 31, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Cengiz Esmersoy, Brian Clark
  • Patent number: 8990022
    Abstract: A disclosed direct velocity seismic sensor includes a housing, a proof mass suspended in the housing by a resilient component, and a motion dampener that damps oscillation of the proof mass to a degree that displacement of the proof mass relative to the housing is substantially linearly proportional to a rate of change of seismic displacements of the housing over a frequency range of interest. A described method for constructing a seismic sensor includes using a calculated resonant frequency to determine a damping factor that causes the displacement of the proof mass to be substantially proportional to the rate of change of seismic displacement of the housing. One illustrative disclosed system includes an optical velocity sensor and a detector where a light beam produced by the velocity sensor and a reference beam interfere at the detector, and the detector produces a signal indicative of a velocity experienced by the velocity sensor.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: March 24, 2015
    Assignee: PGS Geophysical AS
    Inventor: Robert A. P. Fernihough
  • Patent number: 8982666
    Abstract: Methods for fracture characterization of unconventional formations are provided. Synthetic seismic fracture responses can be generated based on the derived fracture parameters. The synthetic seismic fracture responses may then be used to derive optimum seismic data acquisition geometry for fracture characterization. These methods of determining the seismic data acquisition geometry are advantageous over conventional methods in that these methods are more reliable and cheaper than existing empirical methods, particularly as applied to fractured unconventional formations. Moreover, these methods allow fracture parameters to be derived from limited but common well log data. Certain embodiments additionally contemplate determining the presence of gas filled fractures. These characterizations and evaluations of unconventional formations are useful for, among other things, determining optimal producing intervals and optimal drilling locations. These methods can eliminate the use of costly image logs and core data.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 17, 2015
    Assignee: ConocoPhillips Company
    Inventors: Samik Sil, Robert G. Keys, Baishali Roy, Douglas J. Foster
  • 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: 20150057938
    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: Application
    Filed: July 11, 2014
    Publication date: February 26, 2015
    Inventors: Christine E. Krohn, Partha S. Routh
  • Publication number: 20150012221
    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: Application
    Filed: June 20, 2014
    Publication date: January 8, 2015
    Inventors: Reeshidev Bansal, Anatoly Baumstein, Partha S. Routh
  • Patent number: 8908473
    Abstract: A method of subsurface imaging is disclosed, the method involving using input data relating to the geometry of a fracture in a subsurface medium, mechanical properties of the medium and in-situ stress states in the medium, to model the behavior of the fracture and obtain predicted information relating to deformation of the fracture. The predicted information is then used to constrain the interpretation of measured microseismic data caused by movement of the fracture to determine characteristics of the movement and/or failure of the fracture.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: December 9, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Ian Bradford
  • Patent number: 8902699
    Abstract: A measured pressure field, a measured vertical velocity field, and two measured orthogonal horizontal velocity fields are obtained. A programmable computer is used to perform the following. A scaling factor is determined from water acoustic impedance, the measured pressure field, and the horizontal velocity fields. One of the measured pressure field and measured vertical velocity field is combined with one of the measured vertical velocity field scaled by the scaling factor and the measured pressure field scaled by the scaling factor, generating one of up-going and down-going pressure and velocity wavefields.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: December 2, 2014
    Assignee: PGS Geophysical AS
    Inventors: Walter Söllner, Stian Hegna
  • Patent number: 8886498
    Abstract: Simulators and methods for simulating an acoustic field of an acoustic waveguide are provided. A sound speed profile of the acoustic waveguide is generated, where the acoustic waveguide has a region of a first fluid within a second fluid, and the first fluid has a different acoustic index of refraction than the second fluid. The sound speed profile and predetermined parameters of a sound source and a receiver are applied to a parabolic equation (PE) model of sound propagation in the acoustic waveguide. The acoustic field of the acoustic waveguide is determined from the PE model. The acoustic field includes an interference pattern from interference between an acoustic signal of the acoustic source and at least one signal refracted by the region of the second fluid.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: November 11, 2014
    Assignee: University of Delaware
    Inventors: Mohsen Badiey, Boris G. Katsnelson
  • Patent number: 8868348
    Abstract: A well constrained transverse variable height-velocity curve constructing method for seismic wave velocity field construction involves the steps of: a) calculating interval velocity of each stratum by a sonic logging curve, and calculating the conversion horizon velocity of each horizon; b) drawing a circle to collect well points; c) calculating the characteristic parameter values of the height-velocity curve by the interval velocity and the conversion interval velocity of each well; d) calculating the characteristic parameter values by Kriging interpolation.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: October 21, 2014
    Assignee: China National Petroleum Corporation
    Inventors: Yalin Li, Guangmin Hu, Guangming He, Jun Wu, Dongshan Huang, Qiubo Wu, Wanxue Xie
  • Publication number: 20140278120
    Abstract: Embodiments of locating seismic events are disclosed. In one embodiment, a single difference seismic locator and a reverse double difference seismic locator are combined into a combined system of equations, and the combined system of equations is solved to determine a location of the seismic event in substantially real time relative to the seismic event. The combined system of equations may be weighted such that the determined location of the seismic event is partially influenced by the single difference seismic locator and partially influenced by the reverse double difference seismic locator.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: ION Geophysical Corporation
    Inventors: Daniel S. Kahn, Michael E. Glinsky
  • Patent number: 8838428
    Abstract: Methods for identifying hydrocarbon plays include applying predictive models to sediment fill volume(s) to provide play-element volume(s) representing at least one play element. Each play-element volume represents at least 1) qualities of the at least one play element and 2) a probability that the at least one play element satisfies determined criteria for each of a plurality of locations within a basin. The methods further include analyzing the play-element volume(s) to define play-concept volume(s) representing hydrocarbon play(s). Each of a plurality of locations within the play-concept volume(s) is attributed with: 1) an identification of each play element associated with the location, 2) the qualities of each play element, 3) the probability for each play element that it satisfies determined criteria, and 4) a composite likelihood that the location represents a hydrocarbon play. At least one of the volumes may be used to identify hydrocarbon play(s).
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: September 16, 2014
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Christopher Tapscott, Steven R. Schreuder, Ronald J. Kleist, Richard Thomas Mifflin, Can Ardic, Pierre Kedzierski, Kinesh K. Patel
  • Patent number: 8825410
    Abstract: A method of processing seismic data including measurement data and their gradients to obtain gradients of move-out corrected data, comprising deriving gradients of the measurement data, deriving a first term comprising applying a move-out correction function to the measurement data; deriving a second term by applying the move-out correction function to the gradients and deriving gradients of move-out corrected data by adding the first term and the second term. The gradients of move-out corrected data are used to process physical properties of the earth's interior. The method may be used prior to any data processing algorithm which uses measurement gradient data in which move-out correction is applied prior to the algorithm, either because the algorithm makes a zero offset assumption or because it is beneficial for the algorithm to operate on move-out corrected data to reduce aliasing.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: September 2, 2014
    Assignee: Western Geco L.L.C.
    Inventor: Ian Moore
  • Patent number: 8813869
    Abstract: Methods and related systems are described for measuring and analyzing refracted acoustic energy. A plurality of receivers mounted are on a downhole tool, and are arranged and adapted to receive refracted acoustic energy from a downhole formation. Measurements of refracted acoustic energy is analyzed such that information relating to an azimuthal direction relative to the downhole tool of an interface within the downhole formation can be estimated. The receivers can be mounted on a drill collar as part of a LWD tool and steering of the drilling trajectory can be based in part on the estimated formation information.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: August 26, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Nicholas Bennett, Jakob Brandt Utne Haldorsen, Hiroaki Yamamoto, Nobuyasu Hirabayasbi, Takeshi Endo, Richard Timothy Coates
  • Publication number: 20140236487
    Abstract: Methods and computing systems for processing seismic data are disclosed. In one embodiment, a method for processing seismic data comprises receiving seismic data that includes active data corresponding to an active shot from a seismic source. The processing includes processing at least a portion of the active data using a passive data processing technique.
    Type: Application
    Filed: November 27, 2013
    Publication date: August 21, 2014
    Applicant: Westerngeco L.L.C.
    Inventor: WOUTER PEPIJN KIMMAN
  • Patent number: 8767508
    Abstract: Method for estimating a model of seismic velocity in a subsurface region from seismic data (31) recorded on 3-component instruments. The method measures the apparent incidence angle (32) of a seismic wave observed at a surface as a function of wave frequency. This apparent angle is converted to an effective velocity as a function of frequency (33), which is then inverted (34) to obtain a subsurface velocity model.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: July 1, 2014
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Garrett M. Leahy, Rebecca L. Saltzer, Christopher J. Dicaprio
  • Patent number: 8762064
    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: November 19, 2012
    Date of Patent: June 24, 2014
    Assignee: Saudi Arabian Oil Company
    Inventor: Saleh M. Al-Saleh
  • Patent number: 8731838
    Abstract: A stable method for using fat-ray tomography to determine a high-resolution velocity model of the subsurface from seismic data (71). The velocity model (72) may be used in migrating the seismic data (76) to image the subsurface. Rays are traced from a subsurface reflection point to surface source and receiver locations (73), using Fresnel zone construction methods (74) that honor correct initial conditions, with the Fresnel radius being a function of velocity.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: May 20, 2014
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Graham A. Winbow, Hongchuan Sun
  • Patent number: 8694262
    Abstract: A system and method for subsurface characterization including depth and structural uncertainty estimation is disclosed. In one embodiment, the method may include determining a detectability threshold for moveout in a seismic data gather based on the seismic data and computing a depth uncertainty function, wherein the depth uncertainty function represents an error estimate that is used to analyze an interpretation of the seismic data. In another embodiment, the method may include receiving a depth uncertainty volume and at least one interpreted horizon from seismic data, extracting a depth uncertainty cage for each of the interpreted horizons based on the depth uncertainty volume, and simulating multiple realizations for each of the interpreted horizons, constrained by the depth uncertainty cage. The multiple realizations may be used for analyzing changes to geometrical or structural properties of the at least one interpreted horizon.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: April 8, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Philip Stephan Schultz, Cory James Hoelting
  • Publication number: 20140081577
    Abstract: A method for adjusting an isotropic depth image based on a mis-tie volume is provided. The method generally includes obtaining an isotropic velocity volume for a geophysical volume, obtaining an isotropic depth image of the geophysical volume, obtaining time-depth pairs at downhole locations in the geophysical volume, generating mis-tie values based on the time-depth pairs and the isotropic velocity volume, assigning uncertainties to the mis-tie values, generating a smoothest mis-tie volume that satisfies a target goodness of fit with the mis-tie values. Adjustment of the isotropic depth image may be achieved based on the mis-tie volume or a calibration velocity obtained from the mis-tie volume.
    Type: Application
    Filed: November 21, 2013
    Publication date: March 20, 2014
    Applicant: Fairfield Industries Incorporated
    Inventor: Paul Docherty
  • Patent number: 8669881
    Abstract: A container data center includes a container, a plurality of power supplies, an electric switch system, a plurality of normally closed switches, an alarm device, and a controller. The electric switch system is received in the container. The plurality of normally closed switches are connected between the power supplies and the electric switch system. Each normally closed switch is connected with a corresponding one of the power supplies in series. The controller is connected to the normally closed switches and the alarm device, configured for receiving earthquake information containing an earthquake intensity, and configured for controlling the alarm device to activate alarms and controlling some of the normally closed switches or all the normally closed switches to open when the earthquake intensity is equal to or greater than a predetermined earthquake intensity.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: March 11, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Li-Wen Chang
  • Patent number: 8666668
    Abstract: A method for determining values of anisotropic model parameters of a Tilted Transversely Isotropic (TTI) Earth model, the method including obtaining an initial TTI earth model that substantially flattens common-imaging-point gathers and substantially ties seismic data to well data; inputting checkshot data and/or VSP data to determine updated values of Vp0 near the well locations; determining an incremental improvement ??; extrapolating the relative change ?? from near-well locations to the entire three dimensional TTI earth model; determining updated values of Vp0=Vp0 (1???); inputting near-to-mid-offset/angle and mid-to-far-offset/angle residual moveout information; and providing updated values of ? and ?.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: March 4, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Yonghe Sun, Yue Wang, Tong Xu, Leonard Lin Zhang
  • Publication number: 20140052379
    Abstract: Systems and methods are provided for detecting subterranean properties associated with a geological domain. One example method may comprise obtaining waveform information corresponding to a geological domain. The method may further comprise performing a global inversion on the waveform information. Furthermore, the method may comprise performing a deterministic inversion on the waveform information. The method may also comprise determining one or more subterranean properties associated with the geological domain based at least in part on the global inversion and the deterministic inversion.
    Type: Application
    Filed: February 24, 2012
    Publication date: February 20, 2014
    Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Michael McVay, Khiem Tat Tran
  • Patent number: 8645071
    Abstract: A disclosed direct velocity seismic sensor includes a housing, a proof mass suspended in the housing by a resilient component, and a motion dampener that damps oscillation of the proof mass to a degree that displacement of the proof mass relative to the housing is substantially linearly proportional to a rate of change of seismic displacements of the housing over a frequency range of interest. A described method for constructing a seismic sensor includes using a calculated resonant frequency to determine a damping factor that causes the displacement of the proof mass to be substantially proportional to the rate of change of seismic displacement of the housing. One illustrative disclosed system includes an optical velocity sensor and a detector where a light beam produced by the velocity sensor and a reference beam interfere at the detector, and the detector produces a signal indicative of a velocity experienced by the velocity sensor.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: February 4, 2014
    Assignee: PGS Geophysical AS
    Inventor: Robert A. P. Fernihough
  • Patent number: 8614578
    Abstract: The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to the conductive material. An alternating current is passed through the antenna and the impedance of the antenna is measured. The attenuation is determined using the measured impedance. A single frequency measurement may be made, or multiple measurements using different frequencies may be made. Grouped parameters based on properties of the material and the frequency of the current are used to relate the coil impedance to the attenuation. A current frequency for which the ratio of the antenna's resistive part of the impedance to the angular frequency of the current is substantially insensitive to at least one of the parameters is preferred.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: December 24, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Guozhong Gao, H. Frank Morrison, Hong Zhang, Richard A. Rosthal, David Alumbaugh, Cyrille Levesque
  • Patent number: 8600680
    Abstract: Recorded seismic data are represented as a convolution of operators representing a reflectivity series of the earth and a seismic wavelet. The recorded seismic wavelet is represented as a convolution of operators representing a receiver ghost, a source ghost, a ghost-free source system response, an earth filter response, and a receiver system response. The operator representing the receiver ghost is removed from the convolution representing the seismic wavelet. The operator representing the source ghost is removed from the convolution representing the seismic wavelet. The operator representing the ghost-free source response is removed from the convolution representing the seismic wavelet. The operator representing the earth filter response is removed from the convolution representing the seismic wavelet. The operator representing the seismic wavelet is removed from the convolution representing the recorded seismic data.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: December 3, 2013
    Assignee: PGS Geophysical AS
    Inventors: Gregory Ernest Parkes, Stian Hegna, Anthony James Day
  • Patent number: 8594939
    Abstract: A method for adjusting an isotropic depth image based on a mis-tie volume is provided. The method generally includes obtaining an isotropic velocity volume for a geophysical volume, obtaining an isotropic depth image of the geophysical volume, obtaining time-depth pairs at downhole locations in the geophysical volume, generating mis-tie values based on the time-depth pairs and the isotropic velocity volume, assigning uncertainties to the mis-tie values, generating a smoothest mis-tie volume that satisfies a target goodness of fit with the mis-tie values. Adjustment of the isotropic depth image may be achieved based on the mis-tie volume or a calibration velocity obtained from the mis-tie volume.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: November 26, 2013
    Assignee: Fairfield Industries, Incorporated
    Inventor: Paul Docherty
  • Patent number: 8588028
    Abstract: A method to correct errors in a conversion from time gather to angle gather using slant stacks wherein the slant stacking is performed along a direction that is normal to a dip or along three orthogonal directions. The slant stacking is performed in various domains.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: November 19, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: David Nichols, Madhav Vyas, Everett C. Mobley
  • Publication number: 20130289879
    Abstract: The application discloses a process and apparatus for characterising the evolution of a reservoir by co-analyzing the changes in the propagation times and seismic amplitudes of seismic reflections. The method comprising the steps of: providing a base survey of the reservoir with a set of seismic traces at a first time; and providing a monitor survey of the reservoir, taken at a second time, with a set of seismic traces associated to the same positions as in the base survey. The evolution of the reservoir is then characterised by inversion to obtain an estimate of the changes having occurred in the time interval between base and monitor surveys, the inversion being performed using at least some seismic traces for which no assumption is made that the energy is propagating vertically. In a main embodiment, inversion is performed by minimising a function which includes a term dependent on the incident angle of the seismic reflections.
    Type: Application
    Filed: April 1, 2011
    Publication date: October 31, 2013
    Applicant: Total S.A.
    Inventor: Andrea Grandi
  • Patent number: 8554484
    Abstract: A technique includes receiving seismic data acquired in a seismic survey in the vicinity of a reflecting interface. The survey has an associated undersampled direction. The technique includes providing second data indicative of discrete samples of incident and reflected components of a continuous seismic wavefield along the undersampled direction and relating the discrete samples to a linear combination of the continuous incident and reflected seismic wavefields using at least one linear filter. Based on the relationship, an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefields is constructed.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: October 8, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Dirk-Jan Van Manen, Massimiliano Vassallo, Ali Ozbek
  • Publication number: 20130238249
    Abstract: A system and method are described herein for generating a velocity model of returned seismic signals for under-ocean floor environments. The system and method generate a series of source signals, receive a corresponding set of direct signals, reflected signals, and refracted signals, solve a velocity model equation using a full waveform inversion function with respect to the received set of direct signals, reflected signals and refracted signals to minimize a least square misfit function by relaxing a dependency on low frequency reflections in the full waveform inversion function. The system and method then generate the velocity model based on the solution to the velocity model equation, and display the velocity model.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventors: Sheng XU, Feng CHEN, Gilles LAMBARE, Yu ZHANG