Signal Processing Patents (Class 367/21)
  • Patent number: 10379235
    Abstract: A method of more accurate phase encoding of phase offset vibrators used in simultaneous-multiple-sourcing 3D seismic mapping. The method measures the actual input energy and the proxy energy thereby determining a bulk error and a frequency-dependent error, both to be applied to correct the proxy energy. The corrected proxy energy is then used to perform actual seismic survey, and the inversion is then performed using the corrected proxy energy to source separate each vibe where the error is minimized.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: August 13, 2019
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Peter M. Eick, Joel D. Brewer, Shan Shan
  • Patent number: 10353100
    Abstract: A technique includes receiving first data acquired by at least a particle motion gradient sensor or a rotation sensor of a streamer that is subject to vibration due to towing of the streamer; and receiving second data acquired by at least one particle motion sensor of the streamer and being indicative of particle motion and vibration noise. The technique includes processing the second data in a processor-based machine to, based at least in part on the first data, attenuate the vibration noise indicated by the second data to generate third data indicative of the particle motion.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: July 16, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Nicolas Goujon, Johan O. A. Robertsson, Ahmet Kemal Ozdemir
  • Patent number: 10338255
    Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: July 2, 2019
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Patent number: 10317554
    Abstract: A method can include receiving data in a data domain where a first portion of the data domain includes a signal to noise ratio that exceeds a signal to noise ratio in a second portion of the data domain; generating a model; in a transform domain, based at least in part on the model, filtering at least a portion of the data in the second portion of the data domain; and, based at least in part on the filtering, outputting noise attenuated data for at least a portion of the data in the second portion of the data domain.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 11, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Antoun Henri, Ian Moore
  • Patent number: 10310121
    Abstract: Methods are disclosed for sensing acoustic waves in a medium. One example includes a first elongated member, a first motion sensor sensitive to vibrations of the first elongated member, a second motion sensor spaced apart from the first motion sensor and also sensitive to vibrations of the first elongated member, and a first vibration source operably coupled to the first elongated member and configured to vibrate the first elongated member.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: June 4, 2019
    Assignee: ION Geophysical Corporation
    Inventor: Robert E. Rouquette
  • Patent number: 10281605
    Abstract: Various technologies described herein are directed to a method that includes deploying a plurality of wave gliders in a seismic survey area, where the plurality of wave gliders has one or more seismic sensors coupled thereto for acquiring seismic data. The method may also include deploying at least one source vessel in the seismic survey area, where the at least one source vessel has one or more sources coupled thereto and a central communication unit disposed thereon. The method may then include positioning the plurality of wave gliders according to an initial navigation plan. The method may further include monitoring a relative position of a respective wave glider in the plurality of wave gliders with respect to other wave gliders in the plurality of wave gliders and with respect to the at least one source vessel.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: May 7, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Everhard Muyzert, Kenneth E. Welker
  • Patent number: 10261202
    Abstract: A computing system and method for mitigating, in a first seismic survey, cross-talk generated by a second seismic survey. The method includes performing the first seismic survey with a first survey seismic source driven by a first survey pilot sweep, performing the second seismic survey with a second survey seismic source, simultaneously with the first seismic survey, recording with first survey seismic sensors (i) first survey seismic signals that originate from the first survey seismic source and (ii) second survey seismic signals that originate from the second survey seismic source, selecting another first survey pilot sweep, which has less cross-correlation noise with the second survey seismic signals than the first survey pilot sweep, and continuing the first seismic survey with the another first survey pilot sweep.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: April 16, 2019
    Assignee: CGG SERVICES SAS
    Inventor: John Sallas
  • Patent number: 10241220
    Abstract: Sensors used in mapping strata beneath a marine body are described, such as used in a flexible towed array. A first sensor is a motion sensor including a conductive liquid in a chamber between a rigid tube and a piezoelectric motion film circumferentially wrapped about the tube. A second sensor is a traditional acoustic sensor or a novel acoustic sensor using a piezoelectric sensor mounted with a thin film separation layer of flexible microspheres on a rigid substrate. Additional non-acoustic sensors are optionally mounted on the rigid substrate for generation of output used to reduce noise observed by the acoustic sensors. Combinations of acoustic, non-acoustic, and motion sensors co-located in rigid streamer housing sections are provided.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: March 26, 2019
    Assignee: Seamap USA, LLC
    Inventor: Richard E. Pearce
  • Patent number: 10209386
    Abstract: Method for inverting, in the frequency domain (42), controlled source electromagnetic survey data (41) acquired using a time-division compound waveform made up of sub-sequences of different base waveforms, for example square waves of different frequencies. A windowed Fourier decomposition method is used, with the window size and shape designed in consideration of the sub-sequences. The window length may be twice the length of the compound waveform, or more. Alternatively the window length may be comparable to the sub-sequence length, or slightly less. Window shapes include cos2, rectangular, and triangular. The method addresses the problem of unknown arrival times for each sub-sequence, and also transition transients that occur between sub-sequences.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: February 19, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Scott C. Hornbostel, Shangli Ou
  • Patent number: 10126451
    Abstract: A method for obtaining zero-offset and near zero offset seismic data from a marine survey, with separation of direct arrival information and reflectivity information, the method including: modeling a direct arrival estimate at a passive near-field hydrophone array by using a notional source separation on active near-field hydrophone data; generating reflection data for the passive near-field hydrophone array by subtraction of the modeled direct wave from data recorded by the passive near-field hydrophone array; generating near zero-offset reflectivity traces by stacking the reflection data for the passive near-field hydrophone array on a string-by-string basis or on a combination of strings basis.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: November 13, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventors: John E. Anderson, Michael W. Norris, Haiyang Wang, Young Ho Cha
  • Patent number: 10101477
    Abstract: A system and method for performing seismic exploration with multiple acquisition systems is disclosed. The method includes configuring a first seismic source located outside of an exclusion zone and configuring a second seismic source located inside of the exclusion zone. The method further includes obtaining a first seismic dataset corresponding to a first seismic signal emitted by the first seismic source and obtaining a second seismic dataset corresponding to a second seismic signal emitted by the second seismic source. The method further includes combining the first and second datasets to create a complete dataset covering a survey area and creating a seismic image of a subsurface of the survey area.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: October 16, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Cécile Berron, Philippe Herrmann, Julien Cotton, Eric Forgues, John J. Sallas
  • Patent number: 10101479
    Abstract: A method of performing notch compensation and a system to perform notch compensation for a first seismic streamer are described. The method includes disposing the first seismic streamer at a first depth, where the seismic streamer includes a first set of sensors to receive reflections resulting from a seismic source, the reflections indicating a notch at a frequency. The method also includes disposing a second seismic streamer at a second depth, the second depth being less than the first depth and the second seismic streamer including a second set of sensors to receive reflections resulting from the seismic source. The method further includes processing the reflections received by the first set of sensors and the second set of sensors together to derive the match filter, and applying the match filter to the reflections received by the first set of sensors of the first seismic streamer to compensate for the notch.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: October 16, 2018
    Assignee: CONOCOPHILLIPS COMPANY
    Inventors: Stephen K. Chiu, Joel D. Brewer, Peter M. Eick
  • Patent number: 10101495
    Abstract: Systems and methods are provided for a magneto-seismic exploration of a subsurface region. An electromagnetic source may transmit time-varying electromagnetic field into the subsurface region, in the presence of a static or time-varying magnetic field, such that a component of the electric field associated with the time-varying electromagnetic field is substantially parallel to an interface between two subsurface formations in the subsurface region, wherein the electric field interacts with the static or time-varying magnetic field and creates a Lorentz force in each of the subsurface formations. One or more seismic receivers may detect a seismic signal generated by a Lorentz force change at the interface between the two subsurface formations. A computer system may be programmed to process and present the detected seismic signal.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: October 16, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Qiuzi Li, Harry W. Deckman, Mehmet Deniz Ertas
  • Patent number: 10101480
    Abstract: Methods and systems to separate seismic data associated with impulsive and non-impulsive sources are described. The impulsive and non-impulsive sources may be towed through a body of water by separate survey vessels. Receivers of one or more streamers towed through the body of water above a subterranean formation generate seismic data that represents a reflected wavefield produced by the subterranean formation in response to separate source wavefields generated by simultaneous activation of the impulsive source and the non-impulsive source. Methods and systems include separating the seismic data into impulsive source seismic data associated with the impulsive source and non-impulsive source seismic data associated with the non-impulsive.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: October 16, 2018
    Assignee: PGS GEOPHYSICAL AS
    Inventors: Nils Lunde, Okwudili Chuks Orji, Mattias Dan Christian Oscarsson
  • Patent number: 10073183
    Abstract: Methods and systems that attenuate noise in seismic data. In one aspect, noise attenuation methods iteratively generate a low-speed noise model of low-speed noise recorded in the seismic data. The seismic data is arranged into a sparse seismic-data matrix. Low-speed noise refers to noise that propagates at speeds less the speed of sound in water. The low-speed noise model includes the low-speed noise and includes interpolated low-speed noise that approximates portions of the low-speed noise typically affected by spatial aliasing and streamer surface irregularities. The low-speed noise model may be subtracted from the sparse seismic-data matrix to obtain a noise-attenuated sparse seismic-data matrix.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: September 11, 2018
    Assignee: PGS Geophysical AS
    Inventor: Stian Hegna
  • Patent number: 10054704
    Abstract: Data representing a first multiple is predicted, based on first survey data for a target structure, using a multidimensional model of a layer in which the first multiple occurs. Modified survey data is produced by performing a subtraction of the predicted data representing the first multiple from the first survey data. Based on the modified survey data, data representing a second multiple is predicted using the multidimensional model.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: August 21, 2018
    Assignee: WESTERNGECO L.L.C.
    Inventors: Richard Bisley, Ian Moore
  • Patent number: 9952342
    Abstract: In order to acquire seismic data relative to an underground area beneath the sea, seismic waves are emitted in an emission direction forming an angle ? with the vertical using at least one seismic source submerged at a depth d. A seismic signal is collected following the emission of the seismic waves and the propagation of same underground with a view to processing same. In one embodiment of the method, in order to overcome the major problem linked to the depth limit encountered by seismic sources, the processing of the seismic signal comprises a summation of a plurality of terms including the seismic signal and the seismic signal delayed by ?T=2d·cos ?/V, in which V is the speed of propagation of the seismic waves in water.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: April 24, 2018
    Assignees: Total SA, Physeis Consultant
    Inventors: Jacques Blanco, Ramin Nawab, Jean-Luc Boelle, Jean-Marc Mougenot
  • Patent number: 9927544
    Abstract: A system, method, and sensor tool for enhancing sensor effectiveness. A wave is received utilizing multiple sensors in a downhole tool. Hodogram analysis of the wave is performed in response to measurements from the multiple sensors. A direction associated with the wave is determined. The multiple sensors are rotated to best sense the wave in response to the direction associated with the wave.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: March 27, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Wei Hsuan Huang
  • Patent number: 9921321
    Abstract: Seismic pulses are emitted are emitted with consecutive time intervals that follow a pattern described by several Golomb rulers, wherein at least two of the Golomb rulers have at least four marks, such that pair-wise time intervals between seismic pulse emissions are different, to distinguish seismic reflections stemming from different seismic pulses and/or seismic sources from each other. This allows executing seismic surveys with several simultaneously operated seismic source arrays, thereby reducing the survey cost. In a marine environment the seismic sources may be air-gun arrays towed by one or more vessels, and the method can be also applied onshore.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: March 20, 2018
    Assignee: SHELL OIL COMPANY
    Inventors: Boris Nikolaevich Kuvshinov, Mikhail Garievich Danilouchkine, Robert Van Es, Theodericus Johannes Henricus Smit, Horng Jye Hwang
  • Patent number: 9903966
    Abstract: A method for seismic data acquisition can include near-continuously recording seismic data received from a number of seismic receivers and triggering a plurality of source elements, based upon time and not based upon position, at a predefined sequence of times relative to a start of a near-continuous recording.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: February 27, 2018
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Gregg E Parkes
  • Patent number: 9874646
    Abstract: A method for seismic data processing can include obtaining seismic data acquired based upon trigger times and not based upon positions of triggered source elements. The seismic data can include near-continuously recorded seismic data in split records. The split records can be spliced together into a single near-continuous record to produce a trace with seismic data from a single acquired line. The seismic data can be processed by performing a spatial shift for each of a number of time samples to correct for motion of a number of seismic receivers.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: January 23, 2018
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Gregg E Parkes
  • Patent number: 9841519
    Abstract: Methods, systems, and apparatuses are disclosed for sensing acoustic waves in a medium. One example system includes a first elongated member, a first motion sensor sensitive to vibrations of the first elongated member, a second motion sensor spaced apart from the first motion sensor and also sensitive to vibrations of the first elongated member, and a first vibration source operably coupled to the first elongated member and configured to vibrate the first elongated member.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: December 12, 2017
    Assignee: ION GEOPHYSICAL CORPORATION
    Inventor: Robert E. Rouquette
  • Patent number: 9829590
    Abstract: A system and method of processing seismic data obtained using a plurality of towed single-component receivers in a marine environment is described, the towed single-component receivers configured to measure compressional P waves. The method comprises retrieving seismic data from a storage device, the seismic data comprising P-P data and shear mode data, wherein the P-P data and shear mode data were both received at the towed single-component receivers configured to measure compressional P waves to generate the seismic data. The method further comprises processing the seismic data to extract SV-P shear mode data and generating shear mode image data based on the extracted shear mode data.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: November 28, 2017
    Assignee: Board of Regents of the University of Texas System
    Inventor: Bob A. Hardage
  • Patent number: 9829593
    Abstract: Determination of an impulse response at a subsurface image level can include extrapolation of an up-going pressure wavefield to a subsurface image level, extrapolation of a down-going velocity wavefield to the subsurface image level, and determination of the impulse response at the subsurface image level from a hypothetical seismic source by spectral division of the extrapolated up-going pressure wavefield by the extrapolated down-going velocity wavefield.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: November 28, 2017
    Assignee: PGS Geophysical AS
    Inventors: Walter Franz Söllner, Alba Ordoñez
  • Patent number: 9810801
    Abstract: Provided is a method for swell effect and mis-tie correction in high-resolution marine seismic data using multi-beam echo sounder data, and more particularly, a method for swell effect and mis-tie correction in high-resolution marine seismic data using multi-beam echo sounder data capable of acquiring the high-resolution marine seismic data having the swell effect and the mis-tie effectively corrected by using the multi-beam echo sounder data including water depth data of a sea-bottom having high precision.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: November 7, 2017
    Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
    Inventors: Young-Jun Kim, Nam Hyung Koo, Won-Sik Kim, Jong-Hwa Chun
  • Patent number: 9804283
    Abstract: Methods and systems for separating seismic data acquired using a plurality of substantially simultaneously fired sources are described. The sources use sweep sequences having low cross correlation levels to generate seismic waves, and their source signatures are determined. Using the source signatures, the wave fields associated with each of the sources are extracted from the seismic data by, for example, performing a time domain deconvolution.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: October 31, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Matthieu Guillouet, Olivier Winter, Thomas Bianchi
  • Patent number: 9798029
    Abstract: A sensor streamer stretch section. At least some of the example embodiments are methods including measuring at least one parameter related to noise while towing the sensor streamer through a body of water with a towing vessel, and adjusting at least one of a spring constant and a damping coefficient of a stretch section disposed proximate the sensor streamer such that the measured parameter is minimized.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: October 24, 2017
    Assignee: PGS Geophysical AS
    Inventors: Andras Robert Juhasz, Gustav Göran Mattias Südow, Rune Johan Magnus Mattsson, Ulf Peter Lindqvist
  • Patent number: 9791581
    Abstract: A marine streamer spread for acquiring seismic data, the spread including a streamer having a first portion and a second portion; the first portion including both first pressure sensors and pressure derivative sensors for acquiring the seismic data; and the second portion including second pressure sensors. The first portion imparts ghost diversity to the seismic data by having a variable-depth profile and the pressure derivative sensors impart polarity diversity to the seismic data.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: October 17, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Risto Siliqi, Karine Desrues
  • Patent number: 9791580
    Abstract: This disclosure is directed to wavefield separation methods and systems. In one aspect, methods and systems compute an approximate vertical particle velocity wavefield based on a measured pressure wavefield and knowledge of free-surface when the pressure wavefield was measured. The measured pressure wavefield is used to compute an approximate frozen free-surface profile. The approximate frozen free-surface profile and the measured pressure wavefield are used to compute an approximate vertical particle velocity wavefield. The approximate vertical particle velocity wavefield and measured pressure wavefield may be used to compute separate up-going and down-going pressure, or vertical particle velocity, wavefields.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: October 17, 2017
    Assignee: PGS Geophysical AS
    Inventors: Endrias Getashew Asgedom, Okwudili Orji, Walter Söllner
  • Patent number: 9720120
    Abstract: The present invention generally relates to marine seismic prospecting, and in particular to seismic prospecting using multiple vessels. During acquisition of seismic data, a distance between a first seismic vessel and a second seismic vessel may be adjusted according to a predefined function such that data is collected at a variety of offsets.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: August 1, 2017
    Assignee: ION Geophysical Corporation
    Inventors: Jacques Pierre Leveille, Paul Brettwood, Jeffrey Alan Meredith
  • Patent number: 9651698
    Abstract: The invention discloses a multi-beam bathymetric chart construction method based on submarine digital depth model feature extraction. The method comprises the steps of: constructing a DDM (Digital Depth Model) based on raw multi-beam echo soundings; establishing a slope and second derivative composite model based on the DDM; extracting feature points based on DDM sub-blocks; querying the multi-beam depth based on the feature points; constructing the multi-beam bathymetric chart based on layers.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: May 16, 2017
    Assignee: The Second Institute Of Oceanography, SOA
    Inventors: Ziyin Wu, Jihong Shang, Shoujun Li, Dineng Zhao, Jieqiong Zhou
  • Patent number: 9645272
    Abstract: Methods and systems for synchronizing clocks used in underwater devices is described. All clocks have some drift due to frequency accuracy and this disclosure provides a method for periodically synchronizing clocks to an accurate master clock to remove long term drift. A synchronization device can use an accurate clock and hardware to transmit both a sound wave and light pulse at the same point in time. Remote slave clocks can detect the light first, and later the sound, allowing them to calculate the distance the pulse had to travel. The clocks can then synchronize their time to the master clock canceling out any drift. The synchronization device can be packaged in a waterproof housing and can be moved around on a periodic basis between the clock on an underwater robot or any other means.
    Type: Grant
    Filed: January 2, 2015
    Date of Patent: May 9, 2017
    Assignee: OceanServer Technology, Inc.
    Inventor: Jonathan C. Crowell
  • Patent number: 9625596
    Abstract: There is a method for finding a best distribution of source elements that form a vibratory source array. The method includes inputting plural constraints for the source elements; generating plural distributions of the source elements that fulfill the plural constraints; calculating for each distribution a performance index characterizing the source array; and selecting the best distribution from the plural distributions based on a value of the performance index.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: April 18, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Benoit Teyssandier, Robert Dowle, Dominique Thomas, John Sallas
  • Patent number: 9619590
    Abstract: A method for uncertainty estimation for nonlinear inverse problems includes obtaining an inverse model of spatial distribution of a physical property of subsurface formations. A set of possible models of spatial distribution is obtained based on the measurements. A set of model parameters is obtained. The number of model parameters is reduced by covariance free compression transform. Upper and lower limits of a value of the physical property are mapped to orthogonal space. A model polytope including a geometric region of feasible models is defined. At least one of random and geometric sampling of the model polytope is performed in a reduced-dimensional space to generate an equi-feasible ensemble of models. The reduced-dimensional space includes an approximated hypercube. Probable model samples are evaluated based on data misfits from among an equi-feasible model ensemble determined by forward numerical simulation.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 11, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Michael J. Tompkins, Juan Luis Fernandez-Martinez
  • Patent number: 9551799
    Abstract: A method for detecting hydrocarbons including obtaining seismic trace data for a region of interest; processing, using a processor, the seismic trace data to calculate a signal spectrum for each of a plurality of locations in the region of interest; calculating a dominant frequency of the signal spectrum; calculating at least one measure of energy decay above the dominant frequency, calculating at least one measure of energy decay below the dominant frequency, and calculating at least one measure spectral shape of the signal spectrum, and locating a hydrocarbon reservoir in the region of interest using the at least one measure of energy decay below the dominant frequency, the at least one measure of energy decay above dominant frequency and the dominant frequency; or locating a hydrocarbon reservoir in the region of interest using the at least one measure of energy decay below the dominant frequency and the at least one measure of energy decay above dominant frequency; or and locating a hydrocarbon reservoir
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: January 24, 2017
    Assignee: Apex Spectral Technology, Inc.
    Inventors: Robert W. Wiley, Scott W. Peters, Peter H. Wilson
  • Patent number: 9482774
    Abstract: Operation of a marine vessel is disclosed. A marine vessel may be operated so as to determine that an end of a first sail line is approaching. Once determined, a turn path from the end of the first sail line to the beginning of a second sail line may be determined. The turn path may be determined based on at least one of current direction and current magnitude.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: November 1, 2016
    Assignee: ION Geophysical Corporation
    Inventor: Angus Styles
  • Patent number: 9482765
    Abstract: Method and controller for finding a best distribution of source elements that form a vibratory source array. The method includes inputting plural constraints for the source elements; generating plural distributions of the source elements that fulfill the plural constraints; calculating for each distribution a first attribute characterizing the source array; and selecting the best distribution from the plural distributions based on a value of the first attribute.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: November 1, 2016
    Assignee: CGG SERVICES SA
    Inventors: John Sallas, Benoit Teyssandier
  • Patent number: 9470812
    Abstract: Source signature of a source array is measured using an autonomous underwater vehicle which is not physically connected to surface equipment and uses acoustic signals for communication and/or location. Such measurements may be performed while the source array is towed, the AUV then moving in tandem with the source array.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: October 18, 2016
    Assignee: CGG SERVICES SA
    Inventors: Carole Couesnon, Anne Vesin
  • Patent number: 9429671
    Abstract: Embodiments of systems and methods for deploying and retrieving a plurality of autonomous seismic nodes from the back deck of a marine vessel using an overboard node deployment and retrieval system are presented. The overboard system may comprise one or more overboard wheels that are actively powered to move in response to changes in movement of the deployed cable. The overboard system may comprise a first overboard wheel with a plurality of rollers and a second overboard wheel configured to detect movement and/or changes in a position of the deployment line. The overboard system may be configured to move the first overboard wheel in response to movement of the second overboard wheel. In addition, the first overboard wheel may comprise at least one opening or pocket configured to hold a node while the node passes across the wheel. Other seismic devices may also pass through the overboard system, such as transponders and weights attached to the deployment cable.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: August 30, 2016
    Assignee: SEABED GEOSOLUTIONS B.V.
    Inventors: Arne Henning Rokkan, Richard Edward Henman, Leif Johan Larsen, Johan Fredrik Naes, Mariann Ervik, Ole-Fredrik Semb
  • Patent number: 9405026
    Abstract: Method for estimating fluid heterogeneity in a subsurface region from seismic wave attenuation or velocity dispersion that is either measured or extracted from geophysical data (210). A rock physics model in the form of a mathematical relationship is selected that relates attenuation or velocity to frequency and to physical properties that are related to fluid heterogeneity (220). The model, or asymptotes (230) representing the model's behavior at frequency extremes, is inverted (240) and that relationship is used to obtain (250) one or more of the physical properties related to fluid heterogeneity, such as characteristic length scale for fluid saturation heterogeneities (270) and relative volume fractions of the fluids saturating the pore space (280).
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: August 2, 2016
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Julianna J. Toms, Christine E. Krohn, Enru Liu
  • Patent number: 9343060
    Abstract: In voice processing, a first distribution generation unit approximates a distribution of feature information representative of voice of a first speaker per a unit interval thereof as a mixed probability distribution which is a mixture of a plurality of first probability distributions corresponding to a plurality of different phones. A second distribution generation unit also approximates a distribution of feature information representative of voice of a second speaker as a mixed probability distribution which is a mixture of a plurality of second probability distributions. A function generation unit generates, for each phone, a conversion function for converting the feature information of voice of the first speaker to that of the second speaker based on respective statistics of the first and second probability distributions that correspond to the phone.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: May 17, 2016
    Assignee: Yamaha Corporation
    Inventor: Fernando Villavicencio
  • Patent number: 9310504
    Abstract: Systems and methods for detecting swell noise in geophysical data are disclosed. In particular, the systems and methods receive seismic data as input and iteratively generate a signal mask from the seismic data. The seismic data can be generated by hydrophones or geophones. The signal mask can be used to identify traces in the seismic data that are contaminated with swell noise and identify frequencies of the contaminated traces that are contaminated with swell noise.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: April 12, 2016
    Assignee: PGS GEOPHYSICAL AS
    Inventor: Maiza Bekara
  • Patent number: 9279898
    Abstract: Computational systems and methods to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. An exploration-seismology vessel tows a number of streamers that form a smoothly varying data acquisition surface located beneath a fluid surface. In one aspect of this disclosure, the method determines a set of image points that represent a profile of the fluid surface above each streamer. The image points are determined based on pressure and velocity wavefields measured at dual sensors of the streamer. The method then determines an elevation parameter of the image points that minimizes DC offset in a spectral domain of the image points. The elevation parameter corresponds to the streamer-depth bias and can be used to correct for the streamer-depth bias in subsequent calculations of a fluid-surface profile.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: March 8, 2016
    Assignee: PGS GEOPHYSICAL AS
    Inventors: Okwudili Orji, Walter Söllner
  • Patent number: 9274239
    Abstract: A technique includes receiving sensor acquired data, which includes pressure data representative of at least one pressure measurement of a wavefield and particle motion data representative of at least one particle motion measurement of the wavefield. The technique includes filtering the pressure data and the particle motion data with a plurality of directional filters to provide a plurality of filtered datasets. The filtered datasets are associated with different directional ranges. The technique includes estimating an angle of incidence for at least one of the directional ranges based at least in part on at least one of the filtered datasets; and processing the acquired data to determine at least one of an upgoing component of the wavefield and a downgoing component of the wavefield based at least in part on the at least one estimated angle of incidence.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: March 1, 2016
    Assignee: WesternGeco L.L.C.
    Inventors: Massimiliano Vassallo, Dirk-Jan Van Manen, Susanne Rentsch-Smith, Philip A. F. Christie
  • Patent number: 9256925
    Abstract: A method for generating a seismic image, comprising the steps of providing an input trace corresponding to seismic signals received at a receiver at a known receiver depth, using the input trace to generate a series of angle traces, each having a known time dip, for each angle trace, determining a filter H, for each angle trace, correcting the data by using the inverse of the filter H to generate a plurality of deghosted angle traces, copying each deghosted angle trace to a plurality of output locations and applying in each case the time dip for that angle trace so as to generate a plurality of corrected angle traces, at each output location summing a plurality of the corrected angle traces at that output location so as to generate a replacement trace; and using the replacement trace, preferably in combination with other replacement traces, to generate a seismic image.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: February 9, 2016
    Assignee: Shell Oil Company
    Inventors: Jonathan Lewis Sheiman, Ailin Yin
  • Patent number: 9238942
    Abstract: A system, method and computer-readable medium for developing an earth formation is disclosed. A tool conveyed in a borehole induces a stress in the earth formation proximate a borehole. A sensor assembly obtains a measurement of a physical property of the borehole at a plurality of azimuthal locations in the borehole. The values of the physical property are indicative of the induced stress in the formation. A processor forms an image of the borehole using the obtained measurements of the physical property, estimates an azimuthal variation with borehole depth of the induced stress in the formation from the formed image, and alters an operational parameter of a device for developing the earth formation using the estimated azimuthal variation with depth of the induced stress in the formation.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: January 19, 2016
    Assignee: Baker Hughes Incorporated
    Inventors: Daniel Moos, Gamal A. Hassan, Daniel T. Georgi, David A. Castillo, John Fabian
  • Patent number: 9158019
    Abstract: A technique is designed for conducting a seismic survey. The technique utilizes a plurality of vibrator arrays employed to conduct a seismic survey utilizing low frequency and high frequency vibrators in each vibrator array. The plurality of vibrator arrays continuously sweeps low frequency signals via low frequency vibrators. While sweeping low frequency signals, high-frequency vibrators emit high-frequency signals in an alternating pattern between vibrator arrays to enhance the seismic survey.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: October 13, 2015
    Assignee: WESTERNGECO L.L.C.
    Inventor: Claudio Bagaini
  • Patent number: 9140814
    Abstract: A technique facilitates the use of seismic data. The technique utilizes an autonomous underwater vehicle to obtain data on water column characteristics in a seismic survey area. The data can be used to adjust aspects of the seismic survey data and/or the seismic survey technique.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: September 22, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Kenneth E. Welker, Ottar Kristiansen, Morten Svendsen, Julian Edward Kragh
  • Patent number: 9134879
    Abstract: A user interface display method that facilitates setting of various setting parameters for controlling an application program and preserving past values of the setting parameters as historical snapshots. When a setting panel is displayed and the user modifies setting parameter values in the setting panel and saves the new values, the pre-modified setting parameter values are saved as a historical snapshot, and the modified values are saved as the current setting parameters for controlling the program. Historical snapshots of setting panels that have been saved in the past can be displayed simultaneously with the current setting panel in a manner that visually simulates a stack of panels. The user can select any one of the historical panels in the stack, modify the setting values in that panel, and save the modified values as the current settings while keeping the historical snapshot.
    Type: Grant
    Filed: September 30, 2012
    Date of Patent: September 15, 2015
    Assignee: KONICA MINOLTA LABORATORY U.S.A., INC.
    Inventor: Danny Naoshi Kumamoto
  • Patent number: 9121956
    Abstract: Methods, apparatuses, and systems are disclosed that assist in determining a location to acquire seismic data. In one embodiment, a method includes modeling acquisition of seismic data in a first location based on a first factor that impacts acquisition of seismic data in the first location. The method also includes generating a modeled attribute based on the modeling, and determining whether to acquire seismic data in the first location based on the modeled attribute or the first factor.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: September 1, 2015
    Assignee: ION GEOPHYSICAL CORPORATION
    Inventors: Desmond John Flynn, Thomas Cheriyan, John Edward Grant, Stuart Maxwell Darling