Filters Patents (Class 367/43)
  • Patent number: 10401523
    Abstract: An example method for estimating a time of flight (“TOF”) for an acoustic wave generated by an acoustic source for each of a plurality of acoustic receivers in an array can include recording data corresponding to the acoustic wave received at each of the acoustic receivers, estimating a respective TOF for the acoustic wave for each of the acoustic receivers, and discarding one or more of the respective estimated TOFs. Each of the discarded TOFs can be a statistical outlier. The method can also include calculating a plurality of time delays for the acoustic wave using a plurality of non-discarded estimated TOFs, and updating the respective estimated TOFs for the acoustic wave for each of the acoustic receivers using the calculated time delays. Each of the time delays can be a difference between respective estimated TOFs for the acoustic wave for at least two of the acoustic receivers.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: September 3, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Henri-Pierre Valero, Vivien Seguy
  • Patent number: 10386518
    Abstract: A device, medium and method for deblending seismic data associated with a subsurface of the earth. The method includes a step of receiving seismic data S recorded with one or more seismic receivers, wherein the seismic data S includes shot recordings generated by first and second source arrays that are simultaneously actuated; a step of detecting incoherent energy of the seismic data S using a median filter; a step of replacing incoherent parts of the seismic data with a projection filter to obtain deblended data for one of the two or more source arrays; and a step of generating in a computing device an image of the subsurface based on the deblended data.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: August 20, 2019
    Assignee: CGG SERVICES SAS
    Inventors: Chao Peng, Bin Liu, Adel Khalil, Gordon Poole
  • Patent number: 10310138
    Abstract: A method including: generating an updated subsurface property model of a subsurface region, with a computer, from an initial estimate of the subsurface property model by performing an iterative inversion, which includes inverting geophysical data to infer the updated subsurface property model, wherein the generating the updated subsurface property model includes linearly remapping the initial estimate of the subsurface property model based on an inverse of a regularization operator, included with the initial estimate of the subsurface property model, into one in which the regularization operator is represented by an identity matrix, performing a unitary matrix decomposition in order to group the identity matrix with sparse matrices output from the unitary matrix decomposition, and performing a search over at least one trade-off parameter to reduce a misfit between simulated data generated from a most recent estimate of the subsurface property model and the geophysical data until a predetermined stopping crite
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: June 4, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventor: Brent D. Wheelock
  • Patent number: 10261207
    Abstract: A seismic noise mitigation method. The method comprises identifying a wavenumber of a component in a residual wavenumber spectrum having a largest norm based on a preconditioned residual wavenumber spectrum. A contribution to the residual wavenumber spectrum from the identified wavenumber component, is subtracted therefrom. A next residual wavenumber spectrum is based thereon and a relative residual computed based on that. The identifying, subtracting and calculating are repeated until a first to occur termination condition selected from the group consisting of: a current relative residual is less than a threshold residual; a difference between the current relative residual and a smallest relative residual exceeds product of the smallest relative residual and a preselected threshold factor; and a difference between a current number of iterations and a number of iterations corresponding to a currently encountered smallest relative residual encountered exceeds a preselected threshold number of iterations.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: April 16, 2019
    Assignee: PGS Geophysical AS
    Inventors: Andreas Klaedtke, Paolo Terenghi, Roald Gunnar van Borselen, Richard Michael Dyer
  • Patent number: 10228476
    Abstract: A method for survey data processing compensates for visco-acoustic effects in TTI medium in an RTM method. This method employs propagating in conjugate medium to yield correct phase, and acoustic wave propagation to yield correct amplitudes through adaptive matching filtering.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: March 12, 2019
    Assignee: CGG SERVICES SAS
    Inventors: Yi Xie, James Sun, Joe Zhou
  • Patent number: 10034638
    Abstract: Techniques for motion artifact (MA) reduction in impedance plethysmography (IP) and other physiological signals are provided. The techniques limit the amplitude of MA filtered signals by imposing an “?-tube.” The techniques may include the introduction of a regularization term to ensure that the pattern of a filtered signal is similar to the pattern of the primary component of the original, unfiltered signal by maximizing the regularity of the filtered signal. The techniques may be integrated into a portable monitoring device, such as an armband, to remove MA from various diagnostic signals and to extract primary signal components for producing enhanced device performance.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: July 31, 2018
    Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Sardar Ansari, Kayvan Najarian, Kevin Ward
  • Patent number: 10031248
    Abstract: Embodiments of real-time infill in marine seismic surveys using an independent seismic source are described. One method of seismic data acquisition includes acquiring primary seismic data at a plurality of streamers towed by an acquisition vessel based at least in part on energy emitted by a first seismic source, and towing an independent seismic source to acquire infill seismic data at the plurality of streamers based at least in part on energy emitted by the independent seismic source while the primary seismic data is still being acquired at the plurality of streamers based at least in part on the energy emitted by the first seismic source, wherein the independent seismic source is towed independently of the acquisition vessel.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: July 24, 2018
    Assignee: ION Geophysical Corporation
    Inventors: Nikolaos Bernitsas, David James Brookes, David Ridyard, Douglas F. Allinson
  • Patent number: 9880048
    Abstract: An apparatus and method for correcting the wavenumber sensitivity of a distributed fiber optic sensor are disclosed. The distributed fiber optic sensor is deployed in a region of interest to measure a characteristic of an incident acoustic wavefield. A composite response of the distributed sensor is determined based on backscatter optical signals generated by the sensor, where the composite response is indicative of a characteristic of an incident acoustic wavefield. The composite response includes at least a first response having a first wavenumber sensitivity and a second response having a second wavenumber sensitivity. The second wavenumber sensitivity is selected so that wavenumber notches of the first and second responses do not overlap.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: January 30, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: James Martin, Daniela Donno, Bence Papp, Arthur Hartog
  • Patent number: 9841518
    Abstract: A method can include receiving data that includes signal data and coherent noise data where the signal data includes signal data that corresponds to a multidimensional physical structure; generating filtered data by filtering at least a portion of the data to attenuate at least a portion of the coherent noise data by applying a multidimensional geometric coherent noise model defined by at least one geometric parameter; and assessing a portion of the signal data in the generated filtered data to characterize the multidimensional physical structure.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: December 12, 2017
    Assignee: Schlumberger Technology Corporation
    Inventor: Victor Aarre
  • Patent number: 9829592
    Abstract: In one embodiment, a reverse time migration module is configured with a visco-acoustic wave equation for media with heterogeneous attenuation solved using a pseudo-analytical method. Seismic data is obtained for a zone of interest, and a model is created for the zone of interest. The model has spatial variability in velocity and quality factor. Pseudo-analytic Q-compensating reverse time migration (PA-Q-RTM) is performed using the reverse time migration module and the model for the zone of interest to obtain PA-Q-RTM seismic data. In another embodiment, a system for processing seismic data includes a reverse time migration module configured with a visco-acoustic wave equation that is solved from the pseudo-analytical method. The system operates to obtain seismic data for a zone of interest and perform PA-Q-RTM using a model for the zone of interest to obtain PA-Q-RTM seismic data for the zone of interest. Other embodiments and features are also disclosed.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: November 28, 2017
    Assignee: PGS Geophysical AS
    Inventors: Jaime Ramos-Martinez, Alejandro A. Valenciano Mavilio
  • Patent number: 9644475
    Abstract: A method of managing data obtained in a borehole is provided. The method includes monitoring a characteristic with at least one sensor and obtaining raw data therefrom; indexing the raw data with the at least one sensor; recording the indexed data with the at least one sensor; forming a data packet with the at least one sensor, the data packet including at least a portion of the indexed data and index information; and transmitting the data packet in a predetermined segment of a communication protocol.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: May 9, 2017
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Michael A Forsberg, Mike Allen Swatek, James Joseph Freeman, Steve James Coulston, Thomas McClain Scott, Nicholas L Bayard, Henry Chang
  • Patent number: 9638816
    Abstract: A technique includes receiving sensor data; sorting the data into a gather representation that corresponds to a plurality of shots of an energy source; and determining a signal cone based at least in part on at least one characteristic of the gather representation. The technique includes processing the sensor data in a processor-based machine to attenuate noise to generate data representing a signal based at least in part on the determined signal cone and the gather representation.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: May 2, 2017
    Assignee: WESTERNGECO L.L.C.
    Inventors: Susanne Rentsch-Smith, Ali Ozbek, Wouter Gerrit Brouwer, Jason Gardner
  • Patent number: 9551798
    Abstract: A seismic vibrator receives a pilot signal having a predetermined waveform. The pilot signal causes vibrational actuation of at least one moveable element of the seismic vibrator. A continuous seismic signal having content in a first frequency bandwidth of multiple frequencies is generated by the seismic vibrator.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: January 24, 2017
    Assignee: WESTERNGECO L.L.C.
    Inventor: Benjamin P. Jeffryes
  • Patent number: 9500758
    Abstract: The present disclosure includes a method for stabilizing controlled seismic signals based on uncontrolled seismic signals. The method includes calculating reconstructed signals associated with a first receiver. Each reconstructed signal is based on uncontrolled signals recorded by a respective pair of receivers that includes the first receiver and a respective second receiver. The method also includes calculating signal variations. Each signal variation is associated with a respective pair of receivers and based on a difference between the reconstructed signal associated with the respective pair of receivers and a reference associated with the respective pair of receivers. The method also includes calculating a stabilization factor for the first receiver based on the first signal variations. The method also includes modifying controlled seismic signals recorded by the first receiver by applying the stabilization factor to the controlled seismic signals.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: November 22, 2016
    Assignee: CGG SERVICES SA
    Inventors: Florian Duret, Julien Cotton, Daniel Clarke
  • Patent number: 9500759
    Abstract: Methods, systems, and computer-readable media for identifying multiples contamination in a stack are provided. The method includes identifying spatially an area of potential multiples contamination in the stack. The method also includes constructing, using a processor, a model of multiples contamination using well data, and evaluating a degree of contamination in the area of potential contamination using the model of multiples contamination. The method further includes attenuating multiples contamination in the areas of multiples contamination, and validating the stack after attenuating.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 22, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Ramachandra Srigiriraju
  • Patent number: 9354335
    Abstract: A method of determining locations of microseismic events caused by a hydrofracking process is disclosed. The method includes: measuring audio signals using an array of geophones deployed in a monitoring well during hydraulic fracturing; modifying the audio signals according to a predefined nonlinear distortion operator to generate a modified audio signal, wherein the modified audio signal has audible components in a predefined frequency range beyond a cutoff frequency defined by a sampling rate of the respective measured audio signals; and playing the modified audio signals through a stereo or multi-channel speaker system, wherein a user of the stereo or multi-channel speaker system is able to determine the locations of the microseismic events from listening to the modified audio signals.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: May 31, 2016
    Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    Inventor: Christopher D. Chafe
  • Patent number: 9332371
    Abstract: A system for determining loudspeaker position estimates comprises motion sensors (201,203) and a movement processor (205) arranged to determine motion data for a user movable unit where the motion data characterizes movement of the user moveable unit. A user input interface (207) receives user inputs and a user processor (209) processes them into user activations which indicate that at least one of a current position and orientation of the user movable unit is associated with a loudspeaker position. An analyzing processor (211) then generates loudspeaker position estimates in response to the motion data and the user activations. The system thus performs speaker position estimations based on (i) the motion data of the user moveable unit being pointed towards or positioned on a speaker and (ii) the user activations.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 3, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Werner Paulus Josephus De Bruijn
  • Patent number: 9188688
    Abstract: A seismic information processing method and apparatus includes attenuating flexural wave noise information from seismic information. Flexural wave information removal includes receiving the seismic information using an information processing device interface, the seismic information having a plurality of directional components acquired using a multi-axis motion sensor coupled to ice floating on a body of water, the seismic information including desired seismic information and the flexural wave information. A noise model of the flexural wave information may be generated using at least one of the plurality of seismic information directional components using an information processing device. The noise model is improved using an adaptive correction filter, and the improved noise model is applied to at least one directional component of the received seismic information to attenuate the flexural wave information wave in the seismic information.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: November 17, 2015
    Assignee: ION Geophysical Corporation
    Inventors: Gary A. Sitton, Theodore C. Stieglitz
  • Patent number: 9121965
    Abstract: Low sensitivity, single vertical axis or uniaxial transducer sensors are deployed along receiver lines across an area of interest to acquire low frequency passive seismic data from the earth. Recordings formed of the acquired low frequency passive seismic data are decomposed in the frequency-wavenumber (F-K) domain according to wavefront dipping angles into mono-dominant velocity seismic records. Resulting seismic waves of different types are identifiable based on the different dipping angles. Wavefields can then be analyzed separately in either time or frequency domains and analyzed or integrated with other data.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: September 1, 2015
    Assignee: Saudi Arabian Oil Company
    Inventor: Mohammad Abdulghani Al-Jadani
  • Patent number: 9113044
    Abstract: Systems, methods, and devices relating to a field programmable unattended surveillance, low-power sensor node which uses a passive infrared (PIR) based motion detector to trigger a linear array of photodetectors and advanced processing for target detection and classification. The sensor node is equipped with an infrared beacon that is activated once a potential target is detected. The activated infrared beacon can then be seen by an operator using a night vision device.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: August 18, 2015
    Assignee: Her Majesty the Queen in Right of Canada, as Represented by the Minister of National Defence
    Inventor: Benoit Ricard
  • Patent number: 9103935
    Abstract: The method of first arrival picking of seismic refraction data is embodied in software that uses the ?-p transform on energy-ratio seismic records. First, the seismic shots are gathered. Next, the energy ratio (ER) is computed, and then the ?-p transform of the energy ratio is computed. Using a binary mask, a corresponding first arrival energy is selected. The transform is combined with the binary mask and presented as input to an inverse ?-p transform. The inverse transform data is then thresholded, and indices of ER first arrivals are detected based on the thresholds. The software then creates a vector of indices or time samples of picks. This method can be used to better guide the subsequent careful picking of first arrivals. Moreover, the method automatically interpolates missing picks.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: August 11, 2015
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Wail Mousa, Abdullatif Abdulrahman Al-Shuhail
  • 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: 20150117151
    Abstract: Method for locating fault lines or surfaces in 2-D or 3-D seismic data based on the fact that fault discontinuities in the space domain span a wide range in a local slowness (slope) domain, whereas other dipping events in the space domain data, such as noise, tend to be coherent, and hence will appear focused in the slowness dimension. Therefore, the method comprises decomposing the seismic data (102) by a transformation to the local slowness domain, preferably using Gaussian slowness period packets as the local slowness or slope decomposition technique, thereby avoiding problems with the data stationary assumption. In the local slowness domain, faults may be identified (104) using the principle mentioned above, i.e. that faults are represented as a truncation in the space domain data, hence they will appear broadband in the slowness dimension.
    Type: Application
    Filed: September 15, 2014
    Publication date: April 30, 2015
    Inventors: William Curry, Ethan Nowak, Fuxian Song
  • Patent number: 8995223
    Abstract: The various embodiments of the present invention provide a method for removing a Scholte waves and similar ground roll type waves from a seismic sea bottom data in a shallow water. The method comprises acquiring seismic sea bottom data in a shallow waters, applying a time-frequency-wave number (t-f-k) transform on the acquired seismic sea bottom data, identifying a time-frequency relationship of a surface wave based on a specific wave number, identifying a frequency-wave number relationship of a surface wave based on a specific time, designing a time varying frequency-wave number filter in the time-frequency-wave number domain to separate the surface wave, applying a time varying frequency-wave number filtering process to remove an undesired energy and inversing a filtered record by applying an inverse S-Transform operation and an inverse Fourier Transform operation.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: March 31, 2015
    Assignee: The Petroleum Institute
    Inventors: Karl-Andreas Berteussen, Yuefeng Sun, Zhao Zhang
  • Patent number: 8981971
    Abstract: This invention is for a method for transforming a seismic trace into a compressed domain. The seismic source wavelet is transformed into a zero degree phase wavelet and a shifted 90 degree phase wavelet, and the two wavelets span a 2-dimensional sub-space. A dictionary is created by collecting the wavelets in the sub-space. In practice this dictionary is usually combined with conventional existing wavelet dictionaries. The seismic trace is projected onto the dictionary (sub-space alone or combined) to find the best matching projection, with a residual determined after each projection, wherein the sum of the residuals determines the fidelity of the data compression.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: March 17, 2015
    Assignee: Total E&P Research & Technology USA, Inc.
    Inventors: Qingqing Liao, Fuchun Gao, Christian Rivera
  • Publication number: 20150071033
    Abstract: A method for surveying, may include receiving, by a processor, first survey data from a first source, the first source comprising a first signal generated by a subsurface earth formation in response to a passive-source electromagnetic signal, wherein the electromagnetic signal is generated by an electroseismic or seismoelectric conversion of the passive-source electromagnetic signal. The method may also include receiving, by the processor, second survey data from a second source and processing the first survey data and the second survey data to determine one or more properties of a subsurface earth formation.
    Type: Application
    Filed: October 15, 2014
    Publication date: March 12, 2015
    Inventors: Arthur Thompson, Alan Katz, Robert England, Mohammad Rahman, Naga P. Devineni
  • Publication number: 20150063067
    Abstract: A system and method for estimating seismic anisotropy of subsurface formations with high resolution. A method for determining anisotropy parameters of subsurface formations includes generating a synthetic reflectivity gather from a vertical well log. Times of a surface seismic gather are adjusted to those of the synthetic gather. Low-cut filtering is applied to the surface seismic gather. Anisotropy parameters are generated as a difference of the filtered seismic gather and the synthetic gather. An anisotropy value is assigned to each of plurality of layers of a formation based on the generated anisotropy parameters.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 5, 2015
    Inventors: Leon Thomsen, Rongrong Lin
  • Patent number: 8965706
    Abstract: Adaptive filtering method to remove ground roll from seismic data. In an M channel adaptive filter, weights Wi are set using an adaptive algorithm based on seeking the minimum in the partial differential of cost function J. The cost function includes an expansion of the primary trace d into d=dg+?d (where: dg is ground roll contribution and ?d=dsig+dran, where dsig is the reflected signal component and dran is a random noise component) and a corresponding expansion of the reference x into x=xg+?x (where xg is ground roll contribution and ?x=xsig+xran; where xsig is a reflected signal component and xran is a random noise component). The delta components are included in the denominator of cost function J to provide an optimal solution of the filter coefficients biased by the reflection signal and random noise is removed.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: February 24, 2015
    Assignee: WesternGeco L.L.C.
    Inventor: Ying Ji
  • Publication number: 20140369166
    Abstract: Methods, systems, and devices for conducting a seismic survey. The system includes at least one seismic sensor configured to supply a signal responsive to reflections of acoustic energy from an earth surface; and at least one processor configured to: mitigate sensor offset from a sequence of samples representative of the signal by filtering the sequence of samples using a symmetrical-in-time finite impulse response (FIR) filter. The FIR filter may approximate a sinc-in-frequency filter. The at least one processor may be configured to process the sequence of samples using a plurality of filter stages that are rectangular in time. The length of one filter stage of the plurality of filter stages may be different than the length of another filter stage of the plurality of filter stages.
    Type: Application
    Filed: June 17, 2014
    Publication date: December 18, 2014
    Inventor: William T. McDavid
  • Patent number: 8902702
    Abstract: Methods of and apparatus to image one or more subsurface formation features are disclosed. An example method includes generating acoustic waves with a transmitter and receiving the acoustic waves and acoustic data contained therein at one or more receivers. The example method also includes extracting one or more S-S, P-S or S-P reflected waveform data from the acoustic data, estimating a dip of the one or more subsurface formation features, migrating the one or more S-S, P-S or S-P reflected waveform data with the estimated dip and mapping the migrated one or more S-S, P-S or S-P reflected waveform data. In addition, the example method includes identifying one or more permeable subsurface formation features using the mapped migrated one or more S-S, P-S or S-P reflected waveform data.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Nobuyasu Hirabayashi, Kentaro Torii, Hiroaki Yamamoto, Jakob Haldorsen, Arne Voskamp
  • Publication number: 20140286128
    Abstract: Systems and methods are provided for processing seismic data and displaying an output associated with the seismic data. A method includes: separating the seismic data into a fine-scale dataset and a coarse-scale dataset, wherein each dataset includes a non-zero portion of the data; applying a first interpolation to the coarse-scale dataset which results in an interpolated coarse-scale dataset; applying a second interpolation to the fine-scale dataset which results in an interpolated fine-scale dataset, wherein the first and second interpolation are different interpolations; summing together the interpolated coarse-scale dataset and the interpolated fine-scale dataset which results in a summed interpolated dataset; and displaying at least one image based on the summed interpolated dataset.
    Type: Application
    Filed: January 29, 2014
    Publication date: September 25, 2014
    Applicant: CGG SERVICES SA
    Inventors: Johannes GRIMM, Lynn BURROUGHS
  • Publication number: 20140269186
    Abstract: A system and method for isolating signal in seismic data representative of a subsurface region of interest including receiving a seismic dataset representative of seismic signal and seismic noise and a seismic data guide; transforming the seismic dataset and the seismic data guide into a domain wherein the seismic data have a sparse or compressible representation to create a first set and a second set of representative coefficients; comparing the first set of representative coefficients to the second set of representative coefficients to identify and select desirable members of the first set of representative coefficients that are within a defined threshold of the second set of representative coefficients to create an improved first set of representative coefficients; and performing an inverse transform of the improved first set of representative coefficients to generate a modified seismic dataset.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: Sandra Tegtmeier-Last, Gilles Hennenfent, Jeffrey Eaton Cole
  • Patent number: 8818763
    Abstract: Designing a multi-dimensional Finite Impulse Response FIR digital filter to attenuate the coherent noise while preserving reflection signals on seismic data, particular in land seismics, includes computing filter coefficients to minimize an l-norm function of differences between a response of a filter with the computed coefficients and a predetermined response which attenuates signals outside a predetermined range of slowness relative to signals within the predetermined range of slowness. Additional constraints may be imposed on the coefficients to improve the attenuation of signals outside the predetermined range of slowness of the desired reflection signals, and/or to improve uniformity within the desired range.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 26, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Ying Ji, Julian Edward Kragh, Ali Ozbek
  • Publication number: 20140219054
    Abstract: The method of first arrival picking of seismic refraction data is embodied in software that uses the ?-p transform on energy-ratio seismic records. First, the seismic shots are gathered. Next, the energy ratio (ER) is computed, and then the ?-p transform of the energy ratio is computed. Using a binary mask, a corresponding first arrival energy is selected. The transform is combined with the binary mask and presented as input to an inverse ?-p transform. The inverse transform data is then thresholded, and indices of ER first arrivals are detected based on the thresholds. The software then creates a vector of indices or time samples of picks. This method can be used to better guide the subsequent careful picking of first arrivals. Moreover, the method automatically interpolates missing picks.
    Type: Application
    Filed: February 4, 2013
    Publication date: August 7, 2014
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventor: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
  • Patent number: 8781749
    Abstract: Noise may be filtered or attenuated from seismic data by building a four-dimensional volume using the acquired seismic data and then applying a random noise attenuation filter to the four-dimensional volume. The dimensions of the four-dimensional volume may include a trace number dimension, a time dimension, a shot number dimension, and a cable number dimension. The random noise attenuation filter may filter portions of the acquired seismic data if the seismic data is not correlated with respect to other seismic data in the four dimensional volume.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 15, 2014
    Assignee: WesternGeco L.L.C.
    Inventor: Craig Beasley
  • Publication number: 20140169133
    Abstract: A method is performed at a FPGA coprocessor having memory that stores a plurality of blocks of compressed seismic traces. The method includes: receiving, from a host, a request for processing a predefined set of seismic traces, the request including block location and trace header information; accessing one or more of the blocks of compressed seismic traces from the memory in accordance with the block location information; decompressing each of the one or more accessed blocks into one or more seismic traces thereby forming a plurality of decompressed traces of seismic data; selecting all or a portion of the decompressed traces of seismic data in accordance with the trace header information; processing the selected decompressed traces of seismic data by applying one or more predefined operations to the seismic data; and returning the processed seismic data to the host.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: Tamas Nemeth, Peeter Akerberg, Oliver Pell, Oskar Mencer
  • Publication number: 20140092708
    Abstract: A system for collecting seismic data includes plural seismic sensors. The seismic sensors are buried underground. In one application, a first set of seismic sensors are buried at a first depth and a second set of seismic sensors are buried at a second depth. In another application, the sensors alternate along a line, one sensor from the first set and a next sensor from a second set. In still another application, the sensors are randomly distributed below the ground.
    Type: Application
    Filed: June 6, 2013
    Publication date: April 3, 2014
    Inventors: Julien COTTON, Eric FORGUES
  • Patent number: 8675447
    Abstract: A device, medium and method for de-blending seismic data associated with a subsurface of the earth. The method includes a step of receiving seismic data “d” recorded with one or more land receivers, wherein the seismic data includes shot recordings generated by plural sources that are simultaneously actuated; a step of forming either a continuous receiver trace or trace segments from the received seismic data; a step of selecting plural overlapping spatial blocks that cover the surface shot locations; a step of assigning the shot recordings to the plural overlapping spatial blocks; a step of applying a mathematical technique to the recordings to determine de-blended data; and a step of generating an image of the subsurface based on the de-blended data.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: March 18, 2014
    Assignee: CGGVeritas Services SA
    Inventor: Gordon Poole
  • Patent number: 8660798
    Abstract: Seismic data representing the propagation of seismic energy through a geologic volume of interest is processed. The seismic energy propagates through the geologic volume of interest from one or more source locations at or near the geologic volume of interest to one or more detector locations at or near the geologic volume of interest. In processing the seismic data, the seismic energy is modeled as beams (e.g., Gaussian beams). The processing includes determining a filter for the seismic data that attenuates aliasing which may be present in the seismic data due to spacing between detector locations.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: February 25, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventor: Yue Wang
  • Patent number: 8644110
    Abstract: Methods and systems utilizing seismic sensors configured or designed for use in seismic signal detection are provided so as to reduce the occurrence of spurious responses of the sensors. A method of seismic surveying using a seismic sensor may include the steps of deploying the seismic sensor at a location for seismic signal detection and acquiring seismic signals. The seismic signals may include high frequency response signals containing spurious response signals at an identifiable bandwith. The method may further include applying spurious response cancellation based on the bandwidth location of the spurious response signals and generating modified seismic waveforms having extended frequency bandwidth.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: February 4, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Masahiro Kamata
  • Patent number: 8639443
    Abstract: A microseismic monitoring system includes a seismic sensor positioned proximate to a wellbore traversing a formation; an orientation source producing an orientation shot; a hydraulic apparatus operationally connected with the formation to produce a fracture in the formation; a computer control system operationally connected with a database of known spectral attributes for event categories; and a computer readable medium that carries instructions executable by the computer control system that, when executed: receive data from the seismic sensor; select an event of interest from the data received; determine a spectral estimate of the selected event of interest; compare the determined spectral estimate of the selected event of interest to the known spectral estimates; and select from the data received by the seismic source the orientation shot for orientation of the seismic sensor.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: January 28, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Joel Herve Le Calvez, Stewart Thomas Taylor
  • Patent number: 8619499
    Abstract: Systems and methods for modeling a three-dimensional (3D) geological structure to improve maximum continuity interpolation. An integration method describes local anisotropic effects and introduces interpolation techniques to perform the interpolation between two points of interest along a direction of maximum continuity and across fault surfaces.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: December 31, 2013
    Assignee: Landmark Graphics Corporation
    Inventors: Marko Maucec, Jeffrey M. Yarus, Lu Ming Liang
  • Patent number: 8614930
    Abstract: A system and computer-implemented method for accounting for temporal dispersion in low-order finite difference seismic wave propagation is disclosed. An embodiment of the method includes transforming a seismic dataset from time domain to frequency domain to obtain a frequency-domain seismic dataset, applying a frequency-domain time varying filter to the frequency-domain seismic dataset to obtain a filtered frequency-domain seismic dataset, and transforming the filtered frequency-domain seismic dataset from the frequency domain to the time domain to obtain a time-domain filtered seismic dataset. The frequency-domain time varying filter is based on the effective phase velocity inherent in a finite-difference solution to the wave equation. The frequency-domain time varying filter may be applied to a synthetic seismic dataset that was generated by low-order finite difference modeling. A different frequency-domain time varying filter may be applied to recorded seismic data prior to reverse time migration.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: December 24, 2013
    Assignee: Chevron U.S.A. Inc.
    Inventors: Linbin Zhang, Guojian Shan, Yue Wang
  • 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: 8612158
    Abstract: An automatic and robust method to attenuate seismic interference noises in marine seismic survey using multi-dimensional filters in Tau-P domain to identify and isolate seismic interference noises as anomalies.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 17, 2013
    Assignee: WesternGeco L.L.C.
    Inventor: Margaret Chen Yu
  • Publication number: 20130315033
    Abstract: A seismic data processing method for predicting and removing unwanted near-surface noise, e.g. refracted waves and surface waves, from composite seismograms acquired with multiple, encoded seismic sources in which the time records from the different sources overlap or interfere. Surface-consistent properties are determined (403) for the near-surface noise and used to predict the noise waveforms (404) for the composite simultaneous-source seismograms, and the waveforms are then subtracted or adaptively subtracted (406) from the seismograms.
    Type: Application
    Filed: May 3, 2013
    Publication date: November 28, 2013
    Inventor: Christine E. KROHN
  • Publication number: 20130250723
    Abstract: An embodiment of the invention includes combining pseudorandom sweeps with an independent, or nearly independent, survey acquisition technique. Targeted design of pseudorandom sweeps can direct the majority of cross-correlation noise to lie outside key time-lags of the record (i.e., windows of interest). Embodiments of the invention are described herein.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: WESTERNGECO L.L.C.
    Inventors: TIMOTHY JAMES DEAN, Kambiz Iranpour, Pieter Leonard Vermeer, Claudio Bagaini
  • Publication number: 20130235695
    Abstract: The present disclosure describes a system, method and computer readable medium capable of identifying and filtering erroneous seismic data from the computer modeling process. A visual representation of seismic data pertaining to a subterranean formation may be generated and displayed upon a graphic user interface utilizing one or more color schemes. A filtering arrangement may be applied to the seismic data and the visual representation may be updated to include one or more indications illustrating seismic data that has been selected for filtering. The user may adjust filtering operations utilizing a computer generated selection tool. In one embodiment, the system provides a suggestion tool capable of alerting the user to potential seismic data filtering problems.
    Type: Application
    Filed: March 9, 2013
    Publication date: September 12, 2013
    Applicant: Schlumberger Technology Corporation
    Inventors: Leigh Truelove, Martyn Bradley Beardsell
  • Patent number: 8520469
    Abstract: A sensor assembly includes a housing structure, a seismic sensor in the housing structure to measure seismic waves propagated through a subterranean structure, and a pressure sensor in the housing structure. A processor in the housing structure is configured to receive a first signal based on an output of the seismic sensor, and a second signal based on an output of the pressure sensor. First and second digital filters are applied to the first and second signals. Application of the first and second digital filters to the first and second signals causes production of a substantially zero output in response to input that includes just noise data detected at the seismic sensor and the pressure sensor.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: August 27, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Daniel Ronnow, Qinglin Liu, Jon Magnus Soerli, Julian Edward Kragh, Pascal Edme, Everhard Muyzert
  • Publication number: 20130194893
    Abstract: Methods and apparatuses for processing seismic data carrying information about a subsurface structure are provided. One method includes splitting the seismic data in groups, each group including subsets of seismic data for which a distance from a respective shot point to a receiver line in a patch of active detectors corresponding to the shot point is within a predetermined range for the group, and extracting signal data for each block Hankel matrix based on an SVD analysis thereof. Another method includes extracting signal data by subtracting from seismic data an estimated noise model obtained by rank reduction of a Hankel matrix followed by dip filtering, enhanced based on a least square matching filter with the seismic data.
    Type: Application
    Filed: December 3, 2012
    Publication date: August 1, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA