Signal Processing Patents (Class 367/21)
  • Patent number: 10972486
    Abstract: A security system may include a normally open relay between an external network connection and at least one internal network connection, a network controller, and a microcontroller. The network controller may be configured to monitor for malicious activity on an external network accessible through the external network connection. The microcontroller may be configured to cause the normally open relay to temporarily close in response to the network controller failing to detect the malicious activity for a predetermined amount of time and cause the normally open relay to remain open and generate an alert in response to the network controller detecting the malicious activity.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: April 6, 2021
    Assignee: Cyberswarm, Inc.
    Inventors: Octavian Ionescu, Zoran Constantinescu, Bogdan Catalin Serban, Octavian Buiu, Andrei Buiu
  • Patent number: 10962668
    Abstract: A method of reducing surface-scattered noise includes receiving seismic data associated with a marine region, where the marine region includes an ocean bottom, a first zone including water above the ocean bottom, and a second zone including earth subsurface layers below the ocean bottom, and the received seismic data includes signals reflected from the earth subsurface layers and surface-scattered noise reflected from the ocean bottom and an ocean surface; determining a water velocity for the first zone; determining bathymetric values of the ocean bottom; based on the determined water velocity and the bathymetric values, determining a velocity model for the marine region; based on the determined velocity model and wavelet functions of seismic source signals, calculating the surface-scattered noise by solving a wave equation; and determining the signals reflected from the earth subsurface layers by subtracting the calculated surface-scattered noise from the received seismic data.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: March 30, 2021
    Assignee: Saudi Arabian Oil Company
    Inventors: Hongwei Liu, Yi Luo, Vincent Etienne
  • Patent number: 10854308
    Abstract: A sample and hold circuit with long hold time. A sample and hold circuit includes an amplifier, a capacitor, a switch, and a sampling network. The capacitor includes a first terminal coupled to an inverting input of the amplifier. The switch includes a first terminal that is coupled to an output of the amplifier, and a second terminal that is coupled to the inverting input of the amplifier. The sampling network is coupled to a non-inverting input of the amplifier.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: December 1, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Vadim Valerievich Ivanov
  • Patent number: 10788596
    Abstract: A method of generating geophysical data using at least one source. The method may include the steps of generating a geophysical wavefield with a varying signature using at least one source, wherein the signature is varied in a periodic pattern.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: September 29, 2020
    Assignee: EQUINOR ENERGY AS
    Inventors: Lasse Amundsen, Johan Olof Anders Robertsson
  • Patent number: 10775513
    Abstract: A high performance attitude determination system, including a global navigation satellite system (GNSS) receiver, the receiver including a first radio-frequency front-end (RF1) connected to a main antenna; a second radio-frequency front-end (RF2) connected to an auxiliary antenna; and a digital section connected to both RF1 and RF2. The digital section (i) generates a first set of GNSS raw measurements based on signals received from RF1; (ii) generates a second set of GNSS raw measurements based on signals received from RF2; (iii) computes a spatial attitude of a baseline between main and auxiliary antennas, using the first and the second sets of GNSS raw measurements, and based on carrier phase integer ambiguity resolution; (iv) continues updating the spatial attitude using the first and the second sets of GNSS raw measurements without carrier phase integer ambiguity resolution, and using fractional carrier phases. Optionally, RF1 and RF2 use a common clock.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: September 15, 2020
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Sergey Vladislavovich Averin, Mikhail Yurievich Vorobiev, Andrey Valerievich Plenkin, Danila Svyatoslavovich Milyutin
  • Patent number: 10705234
    Abstract: Embodiments of the present disclosure include one or more of a method, computing device, computer-readable medium, and system for statistical line and edge detection and/or enhancement. An example embodiment of the present disclosure may include a method that includes identifying a plurality of data values related to a first object defined by a first plurality of points within the volume, wherein the first object intersects a second object defined by a second plurality of points within the volume; calculating a statistical significance statistic related to the second object; interpolating a P-value related to the statistical significance statistic; and determining a significant P-value taken over the second object, wherein the significant P-value comprises a minimum P-value that provides a maximum negative log(P(statistical significance statistic)).
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: July 7, 2020
    Assignee: Schlumberger Technology Corporation
    Inventor: Trond Hellem Bø
  • Patent number: 10672493
    Abstract: A sample and hold circuit with long hold time. A sample and hold circuit includes an amplifier, a capacitor, a switch, and a sampling network. The capacitor includes a first terminal coupled to an inverting input of the amplifier. The switch includes a first terminal that is coupled to an output of the amplifier, and a second terminal that is coupled to the inverting input of the amplifier. The sampling network is coupled to a non-inverting input of the amplifier.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: June 2, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Vadim Valerievich Ivanov
  • Patent number: 10620332
    Abstract: A method for rotating recorded seismic data.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: April 14, 2020
    Assignee: SERCEL
    Inventor: Simon Leboeuf
  • Patent number: 10591622
    Abstract: Embodiments relate to a sensor cable that may be reconfigurable to have various combinations of seismic sensors. An apparatus may comprise a sensor cable and seismic sensors distributed throughout a volume of the sensor cable and along all three axes of the sensor cable, wherein the seismic sensors are assigned to sampling groups that are reconfigurable and not hardwired.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: March 17, 2020
    Assignee: PGS Geophysical AS
    Inventors: Robertus Franciscus Hegge, Roald G. van Borselen
  • Patent number: 10509103
    Abstract: A radar device employs a configuration provided with: a receiver which, in operation, receives one or more radar transmission signals transmitted from another radar device, in an interference measurement segment in which transmission of a radar transmission signal from the radar device is stopped; A/D conversion circuitry which, in operation, converts the one or more radar transmission signals from the other radar device received by the receiver from one or more analog signals into one or more digital signals; and an interference detection circuitry which, in operation, performs a correlation calculation between each of one or more discrete samples that is the one or more digital signals and a prescribed coefficient sequence to detect one or more prescribed frequency components included in the one or more digital signals, as one or more interference signal components.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: December 17, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaaki Kishigami, Tadashi Morita
  • Patent number: 10495770
    Abstract: Source element of a source subarray can be individually actuated according to an actuation sequence. The actuation sequence can be at least partially based on a relative position of each of the source elements within a particular geometry of the source subarray with respect to a previously actuated source element and a towing velocity of the source subarray.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: December 3, 2019
    Assignee: PGS Geophysical AS
    Inventors: Jostein Lima, Tilman Kluver, Stian Hegna
  • Patent number: 10473817
    Abstract: A method is provided of processing data representing a physical system, the method comprising: providing (P2) input data representing differences in the physical system between a first state and a second state of the physical system; and inverting (P5) the input data, or data derived therefrom, in accordance with a parameterized model (PI) of the physical system to obtain differences in the parameters of the model between the first state and the second state, with parameters of the model representing properties of the physical system; wherein the inverting step is performed (P3 to P6) for a plurality of different perturbations (P4) of the parameterized model and/or of the data to obtain a plurality of sets of differences in the parameters of the model; and wherein a statistical analysis (P7) of the plurality of sets of differences is performed to obtain statistical characteristics of the differences in the parameters of the model.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: November 12, 2019
    Assignee: STATOIL PETROLEUM AS
    Inventor: Ulrich Theune
  • Patent number: 10472032
    Abstract: Autonomous water column profilers are deployed over an area and each independently samples attributes in its water column to provide a three dimensional array of data points. The profilers are negatively buoyant and autonomously assume positive buoyancy; for example, by jettisoning a ballast weight, preferably collecting and storing measurements at programmed times or depths when descending and again when ascending. The devices can be recovered for accessing onboard memories or a wireless communications system can be employed for uploading data to a transponder. The profilers can be deployed from marine vessels, aircraft, or remotely operated vehicles and are advantageous for monitoring oil well leaks or spills, assessing dispersant programs when ameliorating released oil, for sensing natural seeps, and similar applications.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: November 12, 2019
    Assignee: CSA OCEAN SCIENCES, INC.
    Inventors: Kevin C. Peterson, Jodi N. Harney
  • Patent number: 10459097
    Abstract: Methods and Systems for extrapolating wavefields while avoiding disruptions due to spatial aliasing are disclosed. Pressure wavefields measured with pressure sensors and vertical and horizontal velocity wavefields measured with three-axial motions sensors may be spatially aliased in at least one horizontal direction. The pressure wavefield and/or the vertical velocity wavefield are decomposed into one of an up-going wavefield and a down-going wavefield. The up-going or down-going wavefield is extrapolated using an extrapolator that depends on components of a slowness vector. In order to avoid disruptions in the extrapolated wavefield due to spatial aliasing, the components of the slowness vector are calculated from the measured pressure wavefield and the two horizontal velocity wavefields.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: October 29, 2019
    Assignee: PGS Geophysical AS
    Inventor: Walter Sollner
  • Patent number: 10429530
    Abstract: Methods and apparatuses for processing marine seismic data with a process of combined deghosting and sparse ?-p transformation. The process is formulated as an optimization problem. The optimization problem has an objective function that is a weighted sum of two norms: one norm is an Lp norm of the differences between the modeled data and acquired survey wherein the modeled data are derived from a model and a set of adaptive filters; the other norm is an Lq norm of the model; and the optimization variables and solutions are the coefficients of the model and coefficients of the adaptive filters.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: October 1, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: James E. Rickett, Dirk-Jan van Manen
  • Patent number: 10416327
    Abstract: A method, including: storing, in a computer storage device, geophysical seismic data that has been separated into a multiple-free component and a multiple contaminated component; performing, with a processor, a first full wavefield inversion process on the multiple-free component of the seismic data, wherein a first subsurface physical property model is generated; determining, with a processor, an extended target reflectivity, wherein the extended target reflectivity includes a reflectivity for each of a plurality of shots; separately performing, with a processor, a second full wavefield inversion process with the multiple contaminated component of the seismic data for each of the plurality of shots using the reflectivity corresponding to each of the plurality of shots, wherein a second subsurface physical property model is generated; and generating, with a processor, multiple-free final subsurface physical property model by combining the first subsurface physical property model and the second subsurface phys
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: September 17, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Volkan Akcelik, Jerome R. Krebs
  • Patent number: 10401515
    Abstract: A method for estimation of water properties from seismic data can include determining a number of travel times for at least one event based, at least in part, on predefined values for a plurality of water properties, determining an alignment of data values for each of the number of travel times determined for the at least one event, and determining an estimation of a plurality of undetermined water property values based, at least in part, on the alignment of the data values for each of the number of travel times producing a high quantitative measure of a coherence value.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: September 3, 2019
    Assignee: PGS Geophysical AS
    Inventors: Gert-Jan Adriaan van Groenestijn, Rolf Huibert Baardman, Rob Franciscus Hegge
  • Patent number: 10386523
    Abstract: A method, apparatus, and program product model stress characteristics of a subsurface formation based at least in part on acoustic data and image data associated with the subsurface formation. The acoustic data is analyzed to determine acoustic based stress values, and the image data is analyzed to determine image based stress values. The acoustic based stress values and the image based stress values are integrated to generate an integrated stress profile that includes one or more modeled stress characteristics of the subsurface volume.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: August 20, 2019
    Assignee: Schlumberger Technology Corporation
    Inventors: John Adam Donald, GongRui Yan, Haitao Sun, Alexander Ramirez, Francisco Gomez, Xinyu Liang
  • 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: 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: 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: 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: 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: 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: 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