Multiple Hydrophone Cable Systems Patents (Class 367/20)
  • Patent number: 10712464
    Abstract: Various implementations described herein are directed to a method of acquiring seismic data. The method may include towing an array of marine seismic streamers coupled to a vessel. The array comprises a plurality of lead-in cables and streamers, and the plurality of lead-in cables comprises an innermost lead-in cable and an outermost lead-in cable with respect to a center line of the vessel. The method may also include towing a plurality of source cables and one or more seismic sources such that the one or more seismic sources are positioned between the innermost lead-in cable and the outermost lead-in cable.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: July 14, 2020
    Inventors: Rik Wemmenhove, Nicolas Barral, Martin Howlid, Emmanuel Coste
  • Patent number: 10641914
    Abstract: Embodiments, including apparatuses, systems, and methods, for attaching autonomous seismic nodes directly to a deployment cable. The nodes may be attached to the deployment cable by a removable fastener or insert. The fastener may be a staple that surrounds the cable and rigidly couples to the node to securely fasten the cable to the node. The fastener may be secured into the node itself, a housing or enclosure surrounding the node, or into a receiver or mechanism attached to the node. Other fasteners besides a staple may include bands, wires, pins, straps, ties, clamps, and other similar devices that may be inserted around a portion of the deployment line and be removably coupled to the node. After retrieval of the node, the fastener may be removed and discarded.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: May 5, 2020
    Assignee: Seabed Geosolutions B.V.
    Inventors: Arne Henning Rokkan, Johan Fredrik Næs
  • Patent number: 10605934
    Abstract: Embodiments related to marine acoustic vibrator for marine geophysical surveys. An embodiment may include an apparatus, wherein the apparatus may comprise: a coil element comprising a coil; a coil clamp constraining motion of the coil element in at least one direction; and a spring disposed in a load path of the coil clamp. Additional apparatus and methods are disclosed herein.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 31, 2020
    Assignee: PGS Geophysical AS
    Inventors: Rick Kaufman, Aaron McGregor, Todd Allan Reinders
  • Patent number: 10605936
    Abstract: Geophysical sensor cable. At least some of the example embodiments are methods including creating a geophysical sensor cable by: creating a first window through the insulation of a first electrical conductor; creating a second window through the insulation of a second electrical conductor; placing the first and second electrical conductors in a clip; twisting the first and second electrical conductors to create a twisted pair; electrically coupling a first lead of a seismic sensor to the first electrical conductor through a first window; electrically coupling a second lead of the seismic sensor to the second electrical conductor through a second window; encapsulating at least a portion of an internal volume of the clip; and placing the twisted pair and the seismic sensor within an outer jacket of a geophysical sensor cable.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: March 31, 2020
    Assignee: PGS Geophysical AS
    Inventors: Geir Andre Motzfeldt Drange, Jamie Alexander Ricks
  • Patent number: 10551515
    Abstract: A shot interval between activations of at least one frequency-controllable survey source is determined, where the shot interval is determined based on an expected frequency of an output of the at least one frequency-controllable survey source. The at least one frequency-controllable survey source is activated using the determined first shot interval.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: February 4, 2020
    Inventors: Robert Laws, Claudio Bagaini, Ralf Ferber
  • Patent number: 10401518
    Abstract: Estimation of direct arrival signals based on predicted direct arrival signals and measurements can include obtaining notional source signatures for notional sources that correspond to source elements in a seismic source. A first predicted direct arrival signal at a first location and a second predicted direct arrival signal at a second location can be determined. The first location corresponds to a seismic receiver and the second location does not correspond to a seismic receiver. A transfer function can be determined based on the first predicted direct arrival signal at the first location and the second predicted direct arrival signal at the second location. An estimated direct arrival signal at the second location can be determined based on the transfer function and a measurement by the seismic receiver corresponding to the first location. The estimated direct arrival signal represents what a measured direct arrival signal would be at the second location.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: September 3, 2019
    Assignee: PGS Geophysical AS
    Inventor: Stian Hegna
  • Patent number: 10345473
    Abstract: A system having an unmanned marine vessel and a multi-dimensional seismic sensor array coupled to the unmanned marine vessel. The multi-dimensional seismic sensor array is configured to acquire seismic survey data and calculate pressure gradients in multiple directions. The frame includes members that are configured to rotatably pivot with respect to each other in moveable x-shaped crossing configurations.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: July 9, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventor: Roger G. Hine
  • Patent number: 10345468
    Abstract: Computing device and methods process seismic data sets associated with the same surveyed subsurface but recorded with different spatial sampling and temporal bandwidths. The first seismic data is used to guide processing of the second seismic data. An image of the subsurface is generated based on processed second seismic data.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: July 9, 2019
    Assignee: CGG SERVICES SAS
    Inventor: Gordon Poole
  • Patent number: 10330806
    Abstract: A section of a streamer for acoustic marine data collection, the section comprising a carrier for accommodating seismic sensors, wherein the carrier includes, a single body, a first particle motion sensor located on the single body, and a second particle motion sensor being located on the single body, with a 90° angular offset, about a longitudinal axis of the carrier, relative to the first particle motion sensor; and a tilt sensor coupled to the carrier and having a known direction relative to the first and second particle motion sensors so that the tilt sensor determines an angle of tilt of the carrier about a vertical, wherein the first and second particle motion sensors measure a motion related parameter and not a pressure.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: June 25, 2019
    Assignee: SERCEL, INC.
    Inventors: Mike Maples, John S. Hepp
  • Patent number: 10197690
    Abstract: Embodiments relate generally to marine geophysical surveying and, more particularly, embodiments relate to methods for acquiring geophysical data by dynamically manipulating survey spread in response a change in location of a target. A method may comprise actuating an energy source in a body of water, wherein a target for a marine geophysical survey system is located beneath a bottom of the body of water. The method may further comprise detecting energy generated by the energy source. The method may further comprise manipulating a position of a survey spread in response to a change in distribution of the target beneath the bottom of the body of water.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: February 5, 2019
    Assignee: PGS Geophysical AS
    Inventors: Michael Malling, Toralf Lund, Tom Vincent-Dospital, Tollef Jahren
  • Patent number: 10114136
    Abstract: An apparatus for acquiring survey data including streamer equipment comprising a lead-in cable; and a geophysical streamer with a plurality of geophysical sensors distributed along the geophysical streamer, including a forward geophysical sensor; a depressor coupled to the streamer equipment in front of the forward geophysical sensor; a variable tension control device coupled at a back end of the geophysical streamer; and a plurality of tension control system sensors. A method for acquiring survey data including obtaining data from tension control system sensors of a geophysical streamer system; identifying an adjustment to be made to one or more tension control factors of the geophysical streamer system to reduce or control vibrational behavior of streamer equipment of the geophysical streamer system making the adjustment to the one or more tension control factors; and acquiring survey data with the geophysical streamer system.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: October 30, 2018
    Assignee: PGS Geophysical AS
    Inventor: Bengt Boberg
  • Patent number: 10001576
    Abstract: System and method for calculating a pre-plot for a marine seismic acquisition system. The method includes receiving as input a first number of streamer vessels and a second number of source vessels; receiving a geometry of an area to be surveyed; receiving a set of naturally different regions and/or humanly set targets for the area to be surveyed; calculating a first sailing path for a streamer vessel of the first number of streamer vessels; calculating a second sailing path for a source vessel of the second number of source vessels, based on the set of naturally different regions and/or humanly set targets; and entering the pre-plot into a navigation system of the streamer vessel and the source vessel so that the streamer and source vessels dynamically change an offset distance between them, while sailing during a seismic survey, based on the naturally different regions and/or humanly set targets.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 19, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Damien Grenie, Risto Siliqi
  • Patent number: 9857487
    Abstract: A marine seismic streamer comprising a solid, hydrophobic core member that is encased in a hydrophobic streamer skin/casing. The hydrophobic streamer skin may be extruded onto and/or heat welded to the hydrophobic core member. The hydrophobic streamer skin/casing may comprise a thermoplastic polyurethane that includes fluorine and/or silicon moieties, silicon, polydimethylsiloxane or the like. The hydrophobic streamer skin/casing may reduce the drag of the streamer and may provide anti-biofouling properties to the streamer. A hydrophobic paint, coating or polymer may in some instances be disposed on top of the hydrophobic streamer skin/casing.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: January 2, 2018
    Assignee: WESTERNGECO LLC
    Inventors: Robert Seth Hartshorne, Anders Nesheim, Steven Antony Gahlings, Gary John Tustin
  • Patent number: 9841520
    Abstract: So-called “Popcorn shooting”, and especially continuous Popcorn shooting, combined with simultaneous source shooting allows considerable flexibility in producing high-resolution data and in creating source arrays. Using a combination of simultaneous source de-blending and Popcorn reconstruction it is possible to construct using post acquisition processing arrays of any desired length by constructing a popcorn pattern that takes into account the vessel speed and physical arrangement of guns behind the towing vessel.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: December 12, 2017
    Assignee: BP Corporation North America Inc.
    Inventors: Raymond Lee Abma, Allan Ross
  • Patent number: 9804284
    Abstract: A marine seismic source includes source elements configured to emit waves having different frequencies while the source elements are towed at different predetermined depths, respectively. The predetermined depths are calculated such that water-surface reflections of the waves generated by a source element among the source elements interfere constructively with the waves generated by the source element and propagating toward an explored structure under the seafloor. The waves combine to yield a spike-like signature of the source.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: October 31, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Gordon Poole, Robert Dowle
  • Patent number: 9791579
    Abstract: A seismic streamer includes a sensor comprises an axially oriented body including a plurality of axially oriented channels arranged in opposing pairs; a plurality of hydrophones arranged in opposing pairs in the channels; a pair of orthogonally oriented acoustic particle motion sensors; and a tilt sensor adjacent or associated with the particle motion sensors. The streamer has a plurality of hydrophones, as previously described, aligned with a plurality of accelerometers which detect movement of the streamer in the horizontal and vertical directions, all coupled with a tilt sensor, so that the marine seismic system can detect whether a detected seismic signal is a reflection from a geologic structure beneath the streamer or a downward traveling reflection from the air/seawater interface.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: October 17, 2017
    Assignee: SERCEL, INC.
    Inventors: Mike Maples, John S. Hepp
  • Patent number: 9778036
    Abstract: Electromagnetic streamer cables and methods of use. Example systems include: a first electrode, the first electrode at a first location along the streamer cable; a second electrode at a second location along the streamer cable; a first sensor module electrically coupled to the first electrode and second electrode, the first sensor module configured to measure a voltage across the first and second electrodes; a third electrode at a third location between the first and second electrodes; a fourth electrode at a fourth location along the streamer cable, the fourth location distal to the second location; and a second sensor module electrically coupled to the third electrode and fourth electrode, the second sensor module configured to measure a voltage across the third and fourth electrodes.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: October 3, 2017
    Assignee: PGS Geophysical AS
    Inventors: Robert Juhasz, U. Peter Lindqvist, Gustav Göran Mattias Südow
  • Patent number: 9696449
    Abstract: Disclosed are methods and systems for conditioning electrodes while deployed in the sea with a marine electromagnetic survey system. An embodiment of the method may comprise deploying electrodes in seawater during a marine electromagnetic survey. The method further may comprise coupling at least one of the electrodes to a controllable current/voltage source while the electrodes are deployed in the seawater. The method further may comprise sending a first conditioning signal from the controllable current/voltage source to the at least one of the electrodes coupled to the controllable current/voltage source.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: July 4, 2017
    Assignee: PGS Geophysical AS
    Inventors: Robert Andras Juhasz, Ulf Peter Lindqvist
  • Patent number: 9671511
    Abstract: A method for de-ghosting marine seismic trace data is described. A reference seismic trace and a candidate seismic trace are selected from acquired seismic data. The acquired seismic data is gathered using a configuration wherein either a first streamer and a second streamer are disposed at different depths relative to one another and are laterally offset relative to one another, or using a configuration wherein a first source and a second source are disposed at different depths relative to one another and are laterally offset from one another. The reference seismic trace and the candidate seismic trace are processed, e.g., to perform normal moveout correction and/or vertical datum shifting, and the processed reference seismic trace is de-ghosted using the processed, candidate seismic trace.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: June 6, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Richard Winnett
  • Patent number: 9581712
    Abstract: Methods, systems, and apparatuses are disclosed for conducting reconnaissance marine seismic surveys. In one example method of acquiring a marine seismic survey, a plurality of streamers are towed behind an acquisition vessel, the plurality of streamers defining a swath. An independent source is towed by an independent source vessel above one or more of the plurality of towed streamers.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: February 28, 2017
    Assignee: ION Geophysical Corporation
    Inventors: David Brookes, Nikolaos Bernitsas, Paul Farmer
  • Patent number: 9536143
    Abstract: Systems and methods for imaging seismic data using hybrid one-way wave-equation-migration in tilted transverse isotropic media and/or hybrid two-way reverse-time-migration in tilted transverse isotropic media.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: January 3, 2017
    Assignee: Landmark Graphics Corporation
    Inventors: Fan Jiang, Shengwen Jin
  • Patent number: 9500761
    Abstract: A technique facilitates obtaining seismic data in a marine environment. An array of acoustic sources is deployed in a marine environment. The array can be utilized for creating acoustic pulses that facilitate the collection of data on subsea structures. The methodology enables optimization of acoustic source array performance to improve the collection of useful data during a seismic survey.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: November 22, 2016
    Assignee: WESTERNGECO L. L. C.
    Inventors: Jon-Fredrik Hopperstad, Robert Montgomery Laws, Aslaug Strømmen Melboe
  • Patent number: 9448311
    Abstract: A method, system and a marine node for recording seismic waves underwater. The node includes a first module configured to house a seismic sensor; bottom and top plates attached to the first module; a second module removably attached to the first module and configured to slide between the bottom and top plates, the second module including a first battery and a data storage device; and a third module removably attached to the first module and configured to slide between the bottom and top plates, the third module including a second battery.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: September 20, 2016
    Assignee: SEABED GEOSOLUTIONS B.V.
    Inventor: Peter Maxwell
  • Patent number: 9411063
    Abstract: A method and apparatus are provided for managing the acoustic performances of a network of acoustic nodes arranged along towed acoustic linear antennas. The network of acoustic nodes is adapted to determine inter-node distances allowing to locate the acoustic linear antennas. The method includes: obtaining a determined layout of the network of acoustic nodes; obtaining at least one marine environment property relating to an area of performance of a survey with the network of acoustic nodes; and quantifying the acoustic performances of the network of acoustic nodes, using a sound propagation model, the at least one marine environment property and the determined layout.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: August 9, 2016
    Assignee: SERCEL
    Inventors: Christophe L'Her, Simon Vallez
  • Patent number: 9411061
    Abstract: A method for manufacturing a streamer cable includes connecting seismic devices using slacked wire and disposing a polymer body having a channel defined therein around the seismic devices and the wire such that the wire extends through the channel.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: August 9, 2016
    Assignee: WESTERNGECO L.L.C.
    Inventor: Lars Borgen
  • Patent number: 9383467
    Abstract: A seismic cable including sensors, data transmission lines extending the length of the seismic cable for conveying data signals issued from the sensors. Controllers distributed along the seismic cable operate as an interface between the sensors and the data transmission lines. Power supplying lines supply power to the controllers and the sensors. X power supplying lines are alternately connected to one out of X successive controllers. Each controller is adapted for applying on a power supplying line detected as defective the electrical tension provided by another power supplying line. Y data transmission lines are alternately connected to one out of Y successive controllers. Each controller is adapted to redirect towards at least one adjacent controller the data associated with a data transmission line which is determined to be defective.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: July 5, 2016
    Assignee: SERCEL
    Inventors: Alexis Duboue, Noel Voisin, Gaetan Mellier
  • Patent number: 9304222
    Abstract: A method and a catenary seismic source steering gear for towing seismic sources underwater. The catenary gear includes plural seismic sources configured to generate seismic waves underwater; a main rope configured to span between first and second vessels; and a connecting system configured to connect the plural seismic sources to the main rope. The main rope takes a substantially catenary shape when towed by the first and second vessels underwater.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: April 5, 2016
    Assignee: CGGVERITAS SERVICES SA
    Inventors: Yuan Ni, Behzad Vahida
  • Patent number: 9151858
    Abstract: Method and system for dynamical sensor geometry by means of formation control of sensor carrying craft, which operate below the water surface, on the ground, at the water surface and/or in the air, are manned and/or unmanned, and which are provided with one or more sensors. The sensors are arranged on the sensor carrying craft, and/or arranged with the sensor carrying craft in other suitable ways, such as towed behind the craft.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: October 6, 2015
    Assignee: MARITIME ROBOTICS AS
    Inventor: Vegard Evjen Hovstein
  • Patent number: 9140813
    Abstract: Method and support assembly configured to change from a stowing position to an operational position. The support assembly includes a head module; an actuator attached to the head module; a tail module; plural modules provided between the head module and the tail module to form a first branch and a second branch, each branch being connected between the head module and the tail module; and a cable system provided through the means for guiding of the plural modules and connected to the actuator for being wind up and unwind to change a distribution of the modules from an operational position to a stowed position.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: September 22, 2015
    Assignee: CGGVERITAS SERVICES SA
    Inventors: Christophe Guevel, Junya Konno
  • Patent number: 9128208
    Abstract: Method and catenary front-end gear for towing streamers under water. The catenary front-end gear includes a main cable configured to be attached to a vessel and a device; a connecting system configured to connect streamers to the main cable; and plural streamers. The main cable takes a catenary shape when towed by the first vessel underwater.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: September 8, 2015
    Assignee: CGGVERITAS SERVICES SA
    Inventor: Behzad Vahida
  • Patent number: 9122033
    Abstract: A tubular seismic sensing cable for use in wells and a method of deployment into wells to provide higher seismic sensitivity.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: September 1, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mikko Jaaskelainen, Etienne Samson
  • Patent number: 9103942
    Abstract: Methods and systems for survey designs are disclosed. In one embodiment, a method of towing an array of marine streamers is disclosed, wherein: the array includes a plurality of receivers, the array includes a plurality of steering devices, and the array is towed along a first portion of a coil sail path; steering the array of marine streamers along two or more depths; and steering the array of marine streamers to a slant angle while maintaining the array of marine streamers at their respective two or more depths.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: August 11, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Nicolae Moldoveanu, Steven Fealy, Kevin J. Deal
  • Patent number: 9081112
    Abstract: A well borehole seismic sensing system having one or more rotatable sensor arrays. The sensor arrays can have one or more groups of sensors disposed on a cam shaft located along a portion of a well pipe. The sensors can be located within a housing contacting the cam shaft. A motor can rotate the sensors around a longitudinal axis of the pipe.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: July 14, 2015
    Assignee: WRHowell, LLC
    Inventor: William R. Howell
  • Patent number: 9052410
    Abstract: The invention relates to methods and equipment for acquiring and processing marine seismic data are disclosed that correct source movement during inversion. By correcting source movement during inversion, multiple data sets may be acquired independently during overlapping time periods thus reducing the number of sweeps required, generating greater amounts of data, and simplifying data processing.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: June 9, 2015
    Assignee: ConocoPhillips Company
    Inventors: Stephen K. Chiu, Joel D. Brewer, Peter M. Eick
  • Patent number: 9030909
    Abstract: A method of conducting a seismic survey of an area including a region of high seismic velocity regimes in a shallow overburden. According to the method, a zone is identified in which the boundary of the high seismic velocity region has a substantially constant critical angle and a course is plotted through the identified zone. A zone based directional seismic source is applied sequentially, with a directivity angle equal to or close to the measured critical angle. The response is detected using receivers.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: May 12, 2015
    Assignee: Statoil Petroleum AS
    Inventors: Kai Hogstad, Bente Fotland, Constantin Gerea
  • Patent number: 9025412
    Abstract: Discloses herein is a system of acquiring seismic date in a marine environment, which includes: seismic streamers towed by a vessel; and means for detecting and/or locating marine mammals, characterized in that said marine mammal detection and/or location means are secured to said seismic streamers.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: May 5, 2015
    Assignee: Sercel
    Inventors: Gerard Ayela, Stephane Coatelan
  • Patent number: 9019796
    Abstract: A method and a marine front-end gear for connecting a set of streamers to a towing vessel. The front-end gear includes ropes for connecting a first sub-set of streamers to the vessel; lead-ins for connecting a second sub-set of streamers to the vessel; and a back loop cable electrically connected between tails of first and second adjacent streamers. The first streamer belongs to the first sub-set of streamers and the second streamer belongs to the second sub-set of streamers, and streamers of the first sub-set are interspersed with streamers of the second sub-set.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: April 28, 2015
    Assignee: CGG Services SA
    Inventors: Christophe Guevel, Pierre Le Roux, Raphaël Macquin, Jean-Pierre Degez
  • Patent number: 9001617
    Abstract: An apparatus includes a streamer having one or more seismic data acquisition devices enclosed within a skin. The skin has a modulus of elasticity of at least 30 MPa to attenuate a flow noise.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: April 7, 2015
    Assignee: Westerngeco L.L.C.
    Inventors: Eskild Storteig, Oeystein Traetten
  • Patent number: 9001618
    Abstract: The invention comprises a system for attenuating noise in seismic signals detected in a marine seismic streamer. In a particular implementation the system may comprise seismic detectors positioned in the streamer and interconnected to form a plurality of wavenumber filters, with each of the wavenumber filters attenuating signals within a range of wavenumbers. The output signals from the wavenumber filters are operatively connected to a plurality of band-pass filters, and the output signals of the band-pass filters are combined by summation means. The range of wavenumbers attenuated by the wavenumber filters and the passbands of the band-pass filters are selected so that in the output signal of the summation means, signals within a selected frequency range of interest propagating along the cable within a selected velocity range are attenuated and signals within the selected frequency range of interest having a velocity range outside the selected velocity range are preserved.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: April 7, 2015
    Assignee: PGS Geophysical AS
    Inventor: Stian Hegna
  • Patent number: 8995221
    Abstract: A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends the length of the jacket. The strength member is formed as a substantially flat belt having a width to thickness ratio of at least 10. At least one sensor holder is coupled to the at least one strength member. The at least one sensor holder includes at least one arcuate opening for receiving the at least one strength member. The at least one arcuate opening is laterally displaced from a center of the at least one sensor holder such that when the at least one strength member is disposed therein the at least one strength member is substantially tube shaped and substantially coaxial with the jacket.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: March 31, 2015
    Assignee: PGS Geophysical AS
    Inventor: Andre Stenzel
  • Patent number: 8988968
    Abstract: There is described an optical seismic cable (2) comprising a number of sensor units (5) spaced along the length of the cable and a number of connection units (4) spaced along the length of the cable, the cable further comprising a number of first optical fibers extending substantially continuously along the cable from one connection unit to the next, and a number of second optical fibers which each extend part-way along the cable between adjacent connection units, and wherein at each connection unit at least one first optical fiber is joined to a second optical fiber, and wherein at the sensor units sensors are joined to said second optical fibers.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: March 24, 2015
    Assignee: TGS Geophysical Company (UK) Limited
    Inventors: Philip Nash, Michael Henshaw
  • Patent number: 8982662
    Abstract: A multi-component sensor of a fluid-borne acoustic wave that senses pressure and up to three orthogonal particle motion components. The sensor is unresponsive to motion of the sensor mount. Furthermore, the sensor is substantially unresponsive to the turbulent flow of the acoustic medium past the sensor.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: March 17, 2015
    Assignee: ION Geophysical Corporation
    Inventors: Robert E. Rouquette, Andre′ W. Olivier, Dale J. Lambert
  • Patent number: 8964501
    Abstract: A technique includes obtaining multi-component seismic data acquired by two or more seismic sensors while in tow. The multi-component seismic data is indicative of a pressure wavefield and particle motion. The technique includes based on the data, determining at least one high order (i.e., second order or higher) spatial derivative of the pressure wavefield.
    Type: Grant
    Filed: May 25, 2008
    Date of Patent: February 24, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Massimiliano Vassallo, Johan Olof Anders Robertsson, Dirk-Jan Van Manen
  • Patent number: 8960117
    Abstract: Techniques are disclosed relating to using a remote operated vehicle (ROV) to facilitate cleaning of a submerged geophysical equipment (e.g., a streamer) being towed behind a tow vessel. The ROV may, in one embodiment, attach a streamer cleaning unit (SCU) to the streamer, where the SCU is configured to clean the streamer. In another embodiment, the ROV may facilitate cleaning by cleaning the streamer itself using a cleaning attachment coupled to the ROV.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: February 24, 2015
    Assignee: PGS Geophysical AS
    Inventors: Einar Nielsen, Kenneth Karlsen, Rune Tønnessen, Erling Vageskar, Jan Terje Rodseth, Arnt M. Bjorno
  • Publication number: 20150043307
    Abstract: Methods for efficiently acquiring full-azimuth towed streamer survey data are described. The methods use multiple vessels to perform coil shooting.
    Type: Application
    Filed: March 24, 2014
    Publication date: February 12, 2015
    Applicant: WESTERNGECO L.L.C.
    Inventors: NICOLAE MOLDOVEANU, STEVEN FEALY
  • Patent number: 8947973
    Abstract: An embodiment according to one or more aspects of the present disclosure for conducting a marine survey includes towing a survey spread comprising a plurality of receivers and an energy source along a selected course; emitting a signal from an energy source; receiving backscattered acoustic signals at the receivers; and actively detecting a cetacean from the received data.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: February 3, 2015
    Assignee: WesternGeco L.L.P.
    Inventors: Halvor S. Groenaas (Grønaas), Svein Arne Frivik
  • Patent number: 8942060
    Abstract: This is a method of acquiring marine wide azimuth towed streamer seismic data. Preferably, a recording boat which tows a plurality of seismic streamers and at least one source may be accompanied by a plurality of source boats that each tow at least one source. The source boats may preferably activate their respective sources such that the subsurface reflections generated by each source interfere. The time separation between successive shots may preferably be a random variable related to the lowest frequency of interest in the data. Additionally, the source boats may preferably be alternatively fired from the head and tail of the recording streamers.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: January 27, 2015
    Assignee: BP Corporation North America Inc.
    Inventors: Raymond Lee Abma, Gerard Beaudoin
  • Patent number: 8942061
    Abstract: A seismic streamer system for acquiring seismic data includes a plurality of first cable sections each employing a first sensor configuration therein, and at least one second cable section operatively connected to one or more of the first cable sections and employing a second sensor configuration therein. In various embodiments of the streamer system, one or more of the second cable sections are sparsely integrated into a streamer, a streamer array and/or a seismic spread. The first sensor configuration may, e.g., include a conventional hydrophone distribution, and the second sensor configuration may, e.g., include multicomponent sensors such as at least one of a particle velocity sensor, a pressure gradient sensor, an accelerometer and a combination thereof. The present invention is useful for attenuating noise in the measured seismic data as well as deghosting the data.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: January 27, 2015
    Assignee: WesternGeco L.L.C.
    Inventors: Roshitashva Singh, Johan O. A. Robertsson, Ottar Kristiansen
  • Patent number: 8937847
    Abstract: Disclosed herein is a system of acquiring seismic date in a marine environment, which includes: seismic streamers towed by a vessel; and means for detecting and/or locating marine mammals, characterised in that said marine mammal detection and/or location means are secured to said seismic streamers.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: January 20, 2015
    Assignee: Sercel
    Inventors: Gérard Ayela, Stéphane Coatelan
  • Publication number: 20140376330
    Abstract: Wide azimuth data acquisition systems using at least three streamer sets achieve shorter survey time and enhanced angular coverage relative to conventional systems using two streamer sets. Various techniques such as high-density seismic source activation and alternating surveyed bands with skipped bands lead to data quality similar to the conventional system, while maintaining the increased productivity advantage.
    Type: Application
    Filed: December 23, 2013
    Publication date: December 25, 2014
    Applicant: CGG SERVICES SA
    Inventors: Bill HOWIESON, Andrew FELTHAM