Offshore Prospecting Patents (Class 367/15)
  • Patent number: 10712470
    Abstract: Embodiments relate to marine streamer cleaning. An embodiment provides a streamer cleaning apparatus comprising: a housing comprising an inlet configured to receive a streamer and an outlet configured to dispatch the streamer; and scraper lamellas coupled to the housing, wherein the scraper lamellas are arranged to form an opening to receive the streamer. Methods of cleaning a streamer and streamer cleaning systems are also provided.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: July 14, 2020
    Assignee: PGS Geophysical AS
    Inventors: Christian Vasbø, Thomas Hauge, Andreas Carlén
  • Patent number: 10712463
    Abstract: A method for acquiring seismic data comprises operating a seismic vessel towing at least one of a seismic streamer with a plurality of seismic sensors and a seismic source. The inline distance between the vessel and one or more other vessels is adjusted according to a predefined function, where the seismic vessels travel along offset seismic acquisition lines, by increasing and reducing the in-line distance during the acquisition of the seismic data.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: July 14, 2020
    Assignee: ION Geophysical Corporation
    Inventors: Jacques Pierre Leveille, Paul Brettwood, Jeffrey Alan Meredith
  • Patent number: 10578761
    Abstract: A system (1) for operating a subsea sensor field (2), comprises an automated underwater vehicle—AUV (10) and a subsea service station (13). A sensor (11, 12) in the sensor field (2) comprises a permanently installed base unit (11) and a removable control unit (12). The AUV (10) moves control units (12) to the service station (13) for charging and updating, and then back to the base units.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: March 3, 2020
    Assignee: OCTIO AS
    Inventors: Leon Løvheim, Bjarte Fagerås, Magne Oldervoll, Helge Brandsaeter
  • Patent number: 10502852
    Abstract: Embodiments of a method and system for acquiring a marine seismic survey are described. One method may include depositing on a seafloor a line of cable sections extending in a first direction. The line of cable sections may have a first end and a second end and may include a plurality of seismic wavefield receivers. The method may also include moving the line of cable sections by collecting cable sections from the second end of the line and depositing cable sections at the first end of the line so that the line of cable sections travels in the first direction. At least one source vessel may be used to provide acoustical waveforms while the line of cable sections is moving. The acoustical waveforms may be received by the plurality of seismic wavefield receivers in the line of cable sections so as to enable generation of a seismic survey.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: December 10, 2019
    Assignee: ION Geophysical Corporation
    Inventors: Giles Frances Tanfield Watts, Peter Graham Stewart
  • Patent number: 10488540
    Abstract: An seismic sensor device may include a sensor module and a connected vessel. The sensor module may include a seismic sensor for collecting seismic data. The vessel may include a first region for engaging the sensor module. The vessel may also include a second region for coupling the seismic sensor device to a location for collecting seismic data.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: November 26, 2019
    Assignee: ION GEOPHYSICAL CORPORATION
    Inventor: André W. Olivier
  • Patent number: 10479455
    Abstract: Techniques are disclosed relating to towing source elements and geophysical sensors through a body of water using one or more unmanned tow vessel. In some embodiments, a plurality of unmanned tow vessels are configured to tow one or more signal sources and/or one or more streamers. The plurality of unmanned tow vessels may, in some embodiments, traverse various sail paths along a surface of a body of water in order to acquire geophysical data relating to formations disposed below the bottom of the body of water.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: November 19, 2019
    Assignee: PGS Geophysical AS
    Inventor: Rune Toennessen
  • Patent number: 10476605
    Abstract: The present invention provides an underwater communication system capable of efficiently communicating with a plurality of sensor nodes by using a limited frequency in the water. The present invention has a hierarchical structure in which one underwater base station control station manages a plurality of underwater base stations in the water, and each underwater base station within a plurality of underwater base stations centrally manages a plurality of underwater sensor nodes. Furthermore, the present invention enables efficient underwater communication the underwater environment by using different frequencies, when the underwater base station control station performs the underwater communication with the plurality of underwater base stations, and when the underwater base stations perform the underwater communication with the plurality of underwater sensor nodes.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: November 12, 2019
    Inventors: Hak-Lim Ko, Yong-Kap Cho, Tae-Ho Im
  • Patent number: 10466378
    Abstract: Methods and systems to assess in near real-time defects in seismic data resulting from noise and seismic data acquisition-system deviations during a marine survey are disclosed. Methods and systems apply forward modeling to a model of a subterranean formation to generate synthetic seismic data based on the noise and deviations in the seismic data acquisition system. The synthetic seismic data represents the seismic data that would be collected by a marine survey carried out on a subterranean formation with the same structure as the Earth model and includes defects that result from the noise and deviations in the seismic data acquisition system. Error estimation is applied to the synthetic seismic data in order to assess the defects at different stages of seismic data processing.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: November 5, 2019
    Assignee: PGS Geophysical AS
    Inventor: Neil Hugh Richard Turnbull
  • Patent number: 10404356
    Abstract: Vessel communications systems and methods are described. According to one aspect, a vessel communications method includes receiving a first inbound wireless communication within a subject vessel, the first inbound wireless communication comprising positional data regarding a location of a first vessel, receiving a second inbound wireless communication within the subject vessel, the second inbound wireless communication comprising positional data regarding a location of a second vessel, selecting the positional data of the first vessel but not the positional data of the second vessel and after the selecting, outputting an outbound wireless communication comprising the positional data of the first vessel but not the positional data of the second vessel.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: September 3, 2019
    Assignee: McMurdo, Inc.
    Inventors: Alan Yu, J. Joel Faul
  • Patent number: 10274624
    Abstract: Systems and methods of detecting marine seismic survey parameters are provided. A data processing system can obtain seismic data from seismic data acquisition units disposed on a seabed responsive to an acoustic signal propagated from an acoustic source through a water column. The data processing system can determine from the seismic data, a direct arrival time for the acoustic signal at each of the plurality of seismic data acquisition units, and can obtain an estimated depth value of each of the plurality of seismic data acquisition units and an estimated water column transit velocity of the acoustic signal. The data processing system can apply a depth model and a water column transit velocity model to the estimated depth value and to the estimated water column transit velocity determine an updated depth value and an updated water column transit velocity for each of the plurality of seismic data acquisition units.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: April 30, 2019
    Assignee: MAGSEIS FF LLC
    Inventor: Carsten Udengaard
  • Patent number: 10191169
    Abstract: Seismic node systems can be configured for acquiring seismic sensor data with an array of seismic receivers or nodes deployable in a survey area, each receiver or node having a seismic sensor for acquiring the seismic sensor data, a clock, a controller and local memory. The seismic sensor can data characterize a seismic wavefield proximate the seismic receivers in the survey area. Quality control data can be generated based on the seismic sensor data and associated timing information provided by the respective clock, and incorporated into a seismic data flow for recording in the local memory.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: January 29, 2019
    Assignee: ION Geophysical Corporation
    Inventor: David A. Céspedes
  • Patent number: 10185047
    Abstract: A marine acoustic source system and method for steering a seismic source array in a body of water during a seismic survey. The method includes measuring an actual position of the seismic source array; calculating a virtual position of the seismic source array, wherein the virtual position corresponds to a position of the seismic source array when towed with no adjustment from a source steering device; retrieving a pre-plot path that includes desired positions of the seismic source array for the seismic survey; and steering the vessel based on the virtual position so that the virtual position lies on the pre-plot path.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: January 22, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Helene Tonchia
  • Patent number: 10156652
    Abstract: An analysis is proved to determine a candidate line for at least one vessel to traverse in a 3D seismic survey to achieve desired coverage either along a planned line or a new infill line. The analysis can also be used in a 4-D survey to determine the coverage of a candidate line relative to the baseline survey previously conducted. The analysis determines a coverage footprint of the common midpoint lines, at given offsets, so the user or automated system can select a candidate line to achieve the best coverage.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: December 18, 2018
    Assignee: ION Geophysical Corporation
    Inventors: David Robert Bowman, Michael Bernard Tomlinson, Angus Macgregor Styles
  • Patent number: 10114137
    Abstract: The present disclosure is directed to underwater seismic exploration with a helical conveyor and skid structure. The system can include an underwater vehicle comprising a sensor to identify a case having a hydrodynamic shape, wherein the case stores one or more ocean bottom seismometer (“OBS”) units. The underwater vehicle includes an arm. The underwater vehicle includes an actuator to position the arm in an open state above a cap of the case, or to close the arm. The underwater vehicle can move the arm to a bottom portion of the case opposite the cap. An opening of the case can be aligned with the conveyor of the underwater vehicle. The conveyor can receive, via the opening of the case, a first OBS unit of the one or more OBS units. The conveyor can move the first OBS unit to the seabed to acquire seismic data from the seabed.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: October 30, 2018
    Assignee: Fairfield Industries, Inc.
    Inventors: Roger L. Fyffe, Etienne Marc
  • Patent number: 10082589
    Abstract: A group of techniques can be used to determine if components of a seismic spread have deviated from a planned path during a coil or other curved and substantially circular acquisition pattern. In one aspect, and in general, the presently disclosed techniques include a computer-readable program storage medium for determining the deviation of spread array element from a planned curved path during a towed-array marine seismic survey. The method comprises: determining a nominal position of the spread array element at a given point in the planned curved path; determining the actual position of the spread array element; and performing an error analysis predicated on the nominal and actual positions.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: September 25, 2018
    Assignee: WesternGeco L.L.C.
    Inventors: Johan Hauan, Rune Hagelund, Stig Solheim
  • Patent number: 9945973
    Abstract: Method and system for generating a full acquisition path for a marine seismic acquisition system. The method includes receiving survey area information about a survey area to be seismically surveyed; selecting a radius (R) and a length (L) of a lace; selecting an overlap distance (OL) between first and second lanes; generating the full acquisition path by repeating the lace along a first lead line inside the first lane and along a second lead line inside the second lane and replicating the first and second lanes until the entire survey area is covered with laces; and sending the full acquisition path to a streamer vessel for performing the seismic survey.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: April 17, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Damien Grenie, Risto Siliqi, Julie Svay, Keith Wilhelm
  • Patent number: 9915743
    Abstract: A method and marine seismic processing system including an interface for receiving recorded data, wherein the recorded data includes seismic data and bio-acoustic data; a seismic data processor for estimating a source signature from the recorded data, wherein the source signature is associated with a seismic source that emits seismic waves in water during a seismic survey; and a bio-acoustic processor that estimates a presence of a mammal generating the bio-acoustic data, based on a processed signal obtained by removing the source signature from the recorded data.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: March 13, 2018
    Assignee: SERCEL
    Inventors: John Sallas, Simon Vallez
  • Patent number: 9903967
    Abstract: This disclosure is related to marine seismic sources, for example marine seismic sources known in the art as benders. Some embodiments of this disclosure use magnetic reluctance forces to produce seismic energy. For example, pole pieces may be attached to one or more plates of a marine seismic source, and a wire coil may induce an attractive force between the pole pieces to cause deformation of the plates to produce seismic energy. Such marine seismic sources may be components of a marine seismic survey system, and may be used in a method of marine seismic surveying. Methods of making marine seismic sources are also disclosed.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: February 27, 2018
    Assignee: PGS Geophysical AS
    Inventors: Mattias Oscarsson, Oeystein Traetten, Rune Voldsbekk, Rune Toennessen
  • Patent number: 9891333
    Abstract: Apparatuses, systems, and methods for guiding and/or positioning a plurality of seismic nodes on or near the seabed by an autonomous underwater vehicle (AUV) or a remotely operated vehicle (ROV). In one embodiment, an underwater vehicle is configured to monitor the deployment of cable connected to a plurality of seismic nodes, including the touchdown monitoring, positioning, and guiding of deployed autonomous seismic nodes or ocean bottom cable. The underwater vehicle may comprise a propulsion system configured to steer and propel the vehicle in a body of water, a tracking system configured to automatically track the cable and/or attached seismic nodes, and a guidance system configured to communicate with a surface vessel node data in real time or near real time for active guidance and/or positioning of the deployment cable.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: February 13, 2018
    Assignee: SEABED GEOSOLUTIONS B.V.
    Inventors: Geir Valsvik, Arne Henning Rokkan, Jean-Baptiste Danre, Bjarne Isfeldt
  • Patent number: 9874651
    Abstract: A buoy for recording seismic signals while underwater. The buoy includes a body; a buoyancy system configured to control a buoyancy of the body to descend to a predetermined depth (H1); a propulsion system configured to actively adjust a position of the body at a given position (X, Y); a seismic sensor located on the body and configured to record the seismic signals; and a control device configured to control the buoyancy system to maintain the body substantially at the predetermined depth (H1) and to control the propulsion system to maintain the body substantially at the given position (X, Y) while the buoy records seismic data, and also to instruct the seismic sensor when to record seismic signals.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: January 23, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Thierry Brizard, Jean-Paul Gruffeille
  • Patent number: 9869786
    Abstract: Disclosed is a system for acoustically exploring structure of a floor below a water body. The system can comprise a vessel, at least one streamer placed in the water and towed by the vessel. The system can also comprise a plurality of acoustic sensors positioned at regular intervals along the length of the streamer. The longitudinal direction of the streamer can make an angle with the horizontal. The system can also comprise a source for generating acoustic pulses placed in the water and towed by the vessel using a tow line. The tow line can have such length that the horizontal distance between the vessel and the source is larger than the horizontal distance between the vessel and the first sensor closest to the vessel and smaller than the horizontal distance between the vessel and the last sensor most remote from the vessel.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: January 16, 2018
    Assignee: FUGRO N.V.
    Inventors: Andrew Paul Cowlard, Angus James Stephen Ogilvie
  • Patent number: 9857492
    Abstract: Method and marine acoustic source array for generating an acoustic wave in a body of water. The marine acoustic source array includes at least one sub-array. The at least one sub-array includes a float from which plural source points are attached. The source points may be provided on a curved line, straight line, or other desired shape so that a variable-depth source is obtained with a single float. The source points may be divided into groups and the groups may be provided on the curved line, straight line or other desired shape.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: January 2, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Robert Dowle, Thierry Payen
  • Patent number: 9857491
    Abstract: Various implementations described herein are directed to a marine seismic acquisition system. The marine seismic acquisition system may include a first vessel towing a first source array and a first plurality of streamers. The first vessel is configured to travel along a first coil path. The marine seismic acquisition system may include a second vessel towing a second source array and a second plurality of streamers. The second vessel is configured to travel along a second coil path. The marine seismic acquisition system may include a third vessel towing a third source array and a third plurality of streamers. The third vessel is configured to travel along a third coil path. The marine seismic acquisition system may also include a fourth vessel towing a fourth source array and a fourth plurality of streamers. The fourth vessel is configured to travel along a fourth coil path.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 2, 2018
    Assignee: WESTERNGECO L.L.C.
    Inventors: Nicolae Moldoveanu, Steven Fealy
  • Patent number: 9835750
    Abstract: A seismic survey system for recording seismic data underwater in the presence of underwater currents. The system includes first plural buoys configured to descend in water at a predetermined depth (H1) and each having a seismic receiver for recording the seismic data; a first vessel configured to launch the first plural buoys along a first line; and a second vessel configured to recover the first plural buoys at a second line, wherein there is a predetermined distance between the first and second lines. The first plural buoys are configured to travel underwater, at substantially the first predetermined depth (H1), from the first line to the second line, due exclusively to the underwater currents.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: December 5, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Thierry Brizard
  • Patent number: 9829589
    Abstract: A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: November 28, 2017
    Assignee: FAIRFIELD INDUSTRIES, INC.
    Inventors: Clifford H. Ray, Glenn D. Fisseler, James N. Thompson, Hal B. Haygood
  • Patent number: 9784869
    Abstract: A data set representing features of a geologic formation is formed from two or more signal acquisition data set representing independent aspects of the same wavefield. A wavelet transform is performed on the two or more signal acquisition data sets, and the data sets are further transformed to equalize signal portions of the data sets. Remaining differences in the data sets are interpreted as excess noise and are removed by different methods to improve the signal-to-noise ratio of any resulting data set.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: October 10, 2017
    Assignee: PGS Geophysical AS
    Inventor: Tilman Klüver
  • Patent number: 9772418
    Abstract: Marine survey. The various embodiments includes both methods and systems. At least some of the illustrative embodiments are methods including: deploying a spreader structure from vessel into a body of water, wherein the spreader structure defines a deployed width of one kilometer or more; coupling a plurality of sensor streamers to the spreader structure; and towing the plurality of sensor streamers through the water, where the horizontal separation between the sensor streamers is at least partially maintained by the spreader structure. The spreader structure provides horizontal separation sensor streamers without the use of a tensioning force applied to the spreader structure.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: September 26, 2017
    Assignee: PGS Geophysical AS
    Inventor: Godfrey H. Sykes
  • Patent number: 9746570
    Abstract: Presented are methods and a system for efficiently acquiring seismic data based on a virtual seismic spread. A streamer vessel and a source vessel are used in combination and in a specific spatial arrangement collect seismic data. The source arrays can be fired simultaneously, creating blended seismic data that is separated with a deblending algorithm or sequentially to collect seismic data directly. The virtual seismic spread can be configured to reduce survey time or decrease capital costs and health safety and environment exposure based on the size of the streamer array towed by the streamer vessel.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: August 29, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Thomas Mensch, Damien Grenié, Risto Siliqi
  • Patent number: 9696443
    Abstract: Apparatus, computer instructions and method for processing seismic data related to a subsurface of a body of water. The method includes inputting data indicative of recordings made by detectors disposed on a depth-changing profile in response to an acoustic wave reflected from the subsurface; applying a matched mirror migration procedure to the data, wherein the matched mirror migration procedure uses an up-traveling U wave and a down-traveling D wave, at least one of the up-traveling U wave or the down-traveling D wave being constructed based on (i) actual positions of the detectors disposed on the depth-changing profile and corresponding recordings, and (ii) fictitious mirror positions of the actual detectors on the depth-changing profile and corresponding recordings with a changed sign; and generating in a processor an image of the subsurface based on the matched mirror migration procedure.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: July 4, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Robert Soubaras
  • Patent number: 9678230
    Abstract: Method and system for improving azimuth distribution. The system includes plural streamers towed by a streamer vessel; a central source towed by the streamer vessel; first and second front sources located in front of the plural streamers along a traveling direction of the streamer vessel; and first and second large offset front sources located in front of the first and second front sources along the traveling direction. The offset distance between the first and second large offset front sources, along a cross-line direction, is larger than an offset distance between the first and second front sources.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: June 13, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Fabrice Mandroux, Jean-Pierre Degez
  • Patent number: 9658356
    Abstract: Method and dynamically-adjusted marine acoustic source array for generating an acoustic wave in a body of water. The acoustic source array includes a float; plural actuation devices, each actuation device having corresponding cables; and plural source points connected to the float through the corresponding cables. The plural actuation devices dynamically adjust corresponding lengths of the corresponding cables to achieve a desired variable-depth profile for the plural source points.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: May 23, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Robert Dowle, Thierry Payen
  • Patent number: 9625595
    Abstract: Example embodiments of the present disclosure include one or more of a method, computing device, computer-readable medium, and system for creating a heightmap based on at least a portion of seismic data, rendering the heightmap, and illuminating at least a portion of the rendered heightmap.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: April 18, 2017
    Assignee: Schlumberger Technology Corporation
    Inventors: Christian Westlye Larsen, Jimmy Klinger, Amadeus Wieczorek
  • Patent number: 9618636
    Abstract: A technique includes towing at least one seismic source in connection with a survey of a structure; and operating the seismic source(s) to fire shots, where each shot is associated with a frequency sweep. The technique includes varying phases of the frequency sweeps from shot to shot according to a predetermined phase sequence to allow noise in an energy sensed by seismic sensors to be attenuated.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: April 11, 2017
    Assignee: WESTERNGECO L.L.C.
    Inventors: David Fraser Halliday, Robert Montgomery Laws
  • Patent number: 9568630
    Abstract: System and method for steering a vessel during a marine acquisition campaign. The method includes obtaining a pre-plot track of a steered point, wherein the steered point is associated with an equipment spread towed by the vessel; calculating an offset between a past position of the vessel and a current position of the steered point; and steering the vessel along a vessel track, wherein the vessel track is calculated by shifting the pre-plot track of the steered point with at least a cross-line component of the offset.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: February 14, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Hélène Tonchia, Timothée Moulinier
  • Patent number: 9494701
    Abstract: The present method provides spatial sampling of a seismic wavefield on the free surface of the earth at an effective spatial sampling denser than the physical layout of the sensors. The sensors are comprised of a sensing element for vertical particle motion at the earth's surface, and a sensing element for rotational motion around a horizontal axis at the surface of the earth. Stress and wavefield conditions known at the free surface of the earth allow the rotational sensing element to yield the transverse horizontal gradient of the vertical particle motion wavefield. This horizontal gradient and the vertical particle motion data are utilized in the technique of ordinate and slope sampling to yield an improved transverse spatial sampling of the vertical particle motion wavefield. The method has a wide range of application in seismic surveys in oil and gas exploration and production.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: November 15, 2016
    Assignee: Geokinetics, Inc.
    Inventor: Robert H. Brune
  • Patent number: 9465139
    Abstract: Seafloor movements are monitored by measuring the ambient seawater pressure at a plurality of locations adjacent to the seafloor using asynchronous pressure signals generated by a plurality of pressure sensors mounted at different locations on the seafloor over a prolonged period of time(t), wherein harmonic tide-related pressure variations on the asynchronous pressure signals are corrected by an algorithm comprising a mathematical equation that models spatial and temporal pressure variations in an objective function. The method is unconstrained with regard to the synchronicity of depth and/or pressure measurements and does not require additional stationary short tem local reference measurements.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: October 11, 2016
    Inventors: Stefan Kampshoff, Hanno Klemm
  • Patent number: 9423522
    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: December 11, 2012
    Date of Patent: August 23, 2016
    Assignee: WESTERNGECO L.L.C.
    Inventors: Everhard Muyzert, Kenneth E. Welker
  • Patent number: 9423527
    Abstract: A cleaning device for cleaning a marine element towed in water and related methods are provided. The cleaning device includes a body configured to enclose the marine element; at least one wing attached to the body and configured to impart translational and rotational motion to the body when interacting with the water; a switching and locking mechanism configured to change an orientation of the at least one wing between a first orientation and a second orientation when contacting a stopper and also to lock the selected orientation; rotating means attached to an internal surface of the body and configured to contact the marine element, the rotating means having axles that make a fix angle with a longitudinal axis of the body; and a cleaning tool attached to the body and configured to clean the marine element.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: August 23, 2016
    Assignee: CGG SERVICES SA
    Inventor: Raphael Macquin
  • Patent number: 9423518
    Abstract: Dual-sensor seismic data are separated into aliased and unaliased parts in a frequency-wavenumber domain. The seismic data in the unaliased part are processed using a conventional vertical wavenumber. The seismic data in the aliased part are processed using an alternative vertical wavenumber additionally based on a Nyquist wavenumber for the seismic data. The processed unaliased seismic data and the processed aliased seismic data are combined.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: August 23, 2016
    Assignee: PGS GEOPHYSICAL AS
    Inventor: Anthony James Day
  • Patent number: 9400338
    Abstract: A system includes a seismic acquisition system that includes a plurality of nodes and further includes an unmanned airborne vehicle. The unmanned airborne vehicle is to be used with the seismic acquisition system to conduct a seismic survey.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: July 26, 2016
    Assignee: WESTERNGECO L.L.C.
    Inventors: Emmanuel Coste, Kenneth E. Welker, Guillaume Daniel Tamboise
  • Patent number: 9389323
    Abstract: An apparatus for conducting a marine seismic survey is disclosed. The apparatus includes a plurality of sensors configured to measure water pressure, a horizontal derivative of the pressure in two orthogonal directions, vertical particle velocity or acceleration of the water, and a horizontal derivative of the vertical particle velocity or acceleration in two orthogonal directions.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: July 12, 2016
    Assignee: Statoil Petroleum AS
    Inventors: Lasse Amundsen, Harald Westerdahl, Mark Thompson
  • Patent number: 9383469
    Abstract: Disclosed are methods and systems for depth control of a sensor streamer. An example embodiment comprises a method for depth control of a sensor streamer. The example method may comprise towing the sensor streamer in a body of water; measuring noise levels of one or more signals generated on the sensor streamer; and adjusting depth of the sensor streamer at one or more spaced apart locations in response to the measured noise levels.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: July 5, 2016
    Assignee: PGS Geophysical AS
    Inventor: Gustav Goran Mattias Sudow
  • Patent number: 9383470
    Abstract: Streamer and method for deploying the streamer for seismic data acquisition related to a subsurface of a body of water. The method includes a step of releasing into the body of water, from a vessel, a body having a predetermined length together with plural detectors provided along the body; a step of towing the body and the plural detectors such that the plural detectors are submerged; and a step of configuring plural birds provided along the body, to float at a predetermined depth from a surface of the water such that a first portion of the body has a curved profile while being towed underwater.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: July 5, 2016
    Assignee: CGG SERVICES SA
    Inventor: Robert Soubaras
  • Patent number: 9329293
    Abstract: Systems and methods for operating a seismic source to attenuate shot generated noise, or residual energy from previous activation of the source, in recorded seismic data are described. In one aspect, methods operate a single seismic source towed through a body of water along a survey track. As the survey vessel travels along the survey track, the source is activated at the end of randomly selected time delays, resulting in attenuation of shot generated noise. The method also attenuates other forms of coherent noise that align from shot to shot.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 3, 2016
    Assignee: PGS GEOPHYSICAL, AS
    Inventors: Gregg Parkes, Stian Hegna
  • Patent number: 9321513
    Abstract: Method and device for cleaning a marine seismic equipment. The device includes a body, a propulsion system for moving along the streamer, a cleaning device for cleaning the equipment, and a control device for controlling a movement of the device.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: April 26, 2016
    Assignee: CGG SERVICES SA
    Inventors: Raphael MacQuin, Sylvain Levrault
  • Patent number: 9285494
    Abstract: Method for managing shots in a multi-vessel seismic system, including for each slave shooter vessel: a) computing first theoretical shot times, based on a speed a scheduler shooter vessel and shot points associated to the scheduler shooter vessel, associated next shots of the scheduler shooter vessel; b) computing, based on a speed of the slave shooter vessel and the shot points, second theoretical shot times associated to the next shots; c) computing, based on the first theoretical shot times, interpolated virtual shot times; d) computing, based on the first theoretical shot times, the interpolated virtual shot times and a minimum shot time interval, shooting time windows; e) for each next shot: if the second theoretical shot time is in the shooting time window, selecting as a predicted shot time the second theoretical shot time; otherwise, selecting a border of the shooting time window closest to the second theoretical shot time.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: March 15, 2016
    Assignee: SERCEL
    Inventor: Didier Renaud
  • Patent number: 9244185
    Abstract: A system comprises towed marine geophysical equipment, adapted for towing through a body of water; and a surface covering, comprising a textural attribute of shark skin, attached to the marine geophysical equipment. A method comprises towing marine geophysical equipment having a surface covering, comprising a textural attribute of shark skin, attached thereto.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: January 26, 2016
    Assignee: PGS Geophysical AS
    Inventor: Bruce William Harrick
  • Patent number: 9217806
    Abstract: Disclosed are methods and systems for towing one or more electromagnetic sensor streamers from deflectors in an additional geophysical sensor streamer spread. An embodiment discloses a marine geophysical survey system, comprising: a survey vessel; an electromagnetic sensor streamer; and a geophysical sensor streamer spread configured to be towed by the survey vessel, wherein the geophysical sensor streamer spread comprises: sensor streamers configured to be laterally spaced apart from one another; and deflectors adapted to spread the sensor streamers substantially transversely in relation to a direction of motion of the survey vessel, wherein the electromagnetic sensor streamer is configured to be towed from at least one of the deflectors.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: December 22, 2015
    Assignee: PGS Geophysical AS
    Inventors: Oliver Peppe, Marit Ronaess
  • Patent number: 9134442
    Abstract: There is provided herein a system and method of seismic data collection for land and marine data that utilizes narrowband to monochromatic low-frequency non-impulsive sources designed to optimize the ability of migration/inversion algorithms to image the subsurface of the Earth, in particular, full-waveform inversion.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: September 15, 2015
    Assignee: BP Corporation North America Inc.
    Inventors: Joseph A. Dellinger, John T. Etgen, Graham Openshaw
  • Patent number: RE47389
    Abstract: A technique for acquiring wide azimuth seismic data using simultaneous shooting is presented in which a plurality of seismic sources are positioned to achieve a desired crossline sampling as a function of the number of passes. This is accomplished by “interleaving” sources as deployed in the spread, as positioned in multiple passes, or some combination of these things, to achieve an effective shotline interval during acquisition or an effective crossline sampling less than their crossline source separation.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: May 14, 2019
    Inventors: Nicolae Moldoveanu, Craig J. Beasley