Transducer Cable Location Determination Patents (Class 367/19)
  • Patent number: 10371845
    Abstract: A ranging system comprises a plurality of streamers, each with a plurality of receivers. A plurality of transmitters is also disposed along one or more of the streamers, each configured to generate acoustic or ranging signals over one or more channels. A processor is configured to define a subset of the transmitters within a predefined limited range or listening distance of each receiver. In the subset, the transmitters are configured to generate the acoustic signals over different channels.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: August 6, 2019
    Assignee: ION Geophysical Corporation
    Inventor: Clement B. Guillot, III
  • Patent number: 10101482
    Abstract: A method and apparatus are provided for steering a first acoustic linear antenna belonging to a plurality of acoustic linear antennas towed by a vessel. A plurality of navigation control devices are arranged along the plurality of linear antennas in order to act at least laterally on the position of the linear antennas. At least one of the navigation control devices arranged along the first acoustic linear antenna performs steps of: obtaining a local measurement of a feather angle or of a parameter linked to the feather angle, the local measurement being associated with the at least one of the navigation control devices arranged along the first acoustic linear antenna; computing a lateral force, as a function of the obtained local measurement; and applying the computed lateral force.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: October 16, 2018
    Assignee: SERCEL
    Inventors: Thierry Roger, Gaetan Mellier, Christophe L'Her
  • Patent number: 10054705
    Abstract: In the field of marine geophysical surveying, systems and methods for controlling the spatial distribution or orientation of a geophysical sensor streamer or an array of geophysical sensor streamers towed behind a survey vessel are provided. Various techniques for changing the spatial distribution or orientation of such geophysical sensor streamers in response to changing conditions are provided. For example, crosscurrent conditions may be determined based on configuration data received from positioning devices along the length of a streamer, and a new desired orientation for the streamer may be determined based on the crosscurrent conditions. The new desired orientation may include a new desired feather angle for the streamer.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: August 21, 2018
    Assignee: PGS Geophysical AS
    Inventors: Øyvind Hillesund, Torbjørn Ursin, Toralf Lund
  • Patent number: 9869787
    Abstract: Methods and systems for efficiently acquiring towed streamer marine seismic data are described. One method and system comprises positioning a plurality of source-only tow vessels and one or more source-streamer tow vessels to acquire a wide- and/or full-azimuth seismic survey without need for the spread to repeat a path once traversed. Another method and system allows surveying a sub-sea geologic feature using a marine seismic spread, the spread smartly negotiating at least one turn during the surveying, and shooting and recording during the turn. This abstract is provided to comply with the rules requiring an abstract, allowing a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: January 16, 2018
    Assignee: WESTERNGECO L.L.C.
    Inventors: Nicolae Moldoveanu, Alan Strudley
  • Patent number: 9864081
    Abstract: Method for obtaining zero offset or near zero offset data in a marine seismic streamer survey. An acoustic transmitter (41) is attached to one of the buoys (14 or 16) that provide flotation to each streamer (12) and tow umbilical (13). The acoustic transmitters, or single transmitter in the case of a 2-D survey, may be fired (71-73) before each shot from the survey air guns. The response to the acoustic transmitters recorded by the near sensors in each streamer, or by a water break sensor if provided, will be a near-zero to zero-offset record of the shallow subsurface below the water bottom.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: January 9, 2018
    Assignee: ExxonMobil Upstream Research Company
    Inventor: Michael W. Norris
  • Patent number: 9857485
    Abstract: A marine survey acquisition system. The system may include a vessel for towing a marine survey spread. The marine survey spread may include streamers, marine vibrators and a cable. The cable may be coupled to a respective streamer from among the streamers and one of the marine vibrators. The cable may power the respective streamer and the one of the marine vibrators. The one of the marine vibrators may emit energy at a high frequency range.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: January 2, 2018
    Assignee: WESTERNGECO L.L.C.
    Inventors: Emmanuel Coste, Nicolas Goujon, Robert Montgomery Laws
  • Patent number: 9823370
    Abstract: A method is provided for managing a master vessel change in a multi-vessel seismic system. The system includes a master vessel M and at least one slave vessel. The method includes, during at least a part of a multi-vessel operation: selecting a new master vessel M? among the at least one slave vessel, triggered by at least one predetermined event; and transmitting, to the at least one slave vessel, at least one piece of information related to a master vessel change from the master vessel M, called old master vessel, to the new master vessel M?.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: November 21, 2017
    Assignee: Sercel
    Inventor: Didier Renaud
  • Patent number: 9766360
    Abstract: A skeg mounts from the stern of a towing vessel and extends below the waterline. A channel in the skeg protects cables for steamers and a source (e.g., air gun array) of a seismic system deployed from the vessel. Tow points on the skeg lie below the water's surface and connect to towlines to support the steamers and the source. A floatation device supports the source and tows below the water's surface to avoid ice floes or other issues encountered at the water's surface. Seismic streamers have head floats supporting the streamers. Each of the floats has adjustable buoyancy preconfigured to counterbalance the weight in water of the towed component that the float supports. Acoustic signals from a transceiver at the vessel find locations of the towed components. A towed fish at a lower level than the towed components also uses acoustic signals with a transceiver to further refine the locations of the towed components.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: September 19, 2017
    Assignee: ION Geophysical Corporation
    Inventors: Curt Schneider, Timothy A. Dudley
  • Patent number: 9759828
    Abstract: A technique includes receiving data acquired by a seismic sensor on a spread of at least one streamer. The data are indicative of a seismic source signature that is produced by a source seismic to penetrate into the Earth to acquire geophysical information in connection with a seismic survey. The technique includes processing the data to determine a position on the streamer relative to a reference position not disposed on the streamer.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: September 12, 2017
    Assignee: WESTERNGECO L.L.C.
    Inventors: Halvor Sehested Groenaas, Svein Arne Frivik
  • Patent number: 9678233
    Abstract: The Monte-Carlo method of generating Popcorn shooting patterns starts with the number and sizes of the guns available and the length in time of the desired Popcorn pattern. The firing times and order of the guns will be randomly perturbed and a large number of Popcorn patterns built. Candidate Popcorn patterns will then be tested against a set of criteria to identify acceptable or the best patterns. These criteria may include limits on maximum peak strength, distinctiveness compared to the other patterns, and the size of the notches and peaks in the spectra.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: June 13, 2017
    Assignee: BP Corporation North America Inc.
    Inventors: Raymond Lee Abma, Allan Ross
  • Patent number: 9663192
    Abstract: A method for towing marine geophysical sensor streamers in a body of water includes moving a towing vessel at a selected speed along the surface of the body of water. At least one geophysical sensor streamer is towed by the vessel at a selected depth in the water. A velocity of the streamer in the water is measured at at least one position along the streamer. The selected speed of the towing vessel is adjusted if the measured velocity is outside of a selected range.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: May 30, 2017
    Assignee: PGS Geophysical AS
    Inventors: Gustav Göran Mattias Südow, Ulf Peter Lindqvist, Andras Robert Juhasz, Rune Johan Magnus Mattsson
  • Patent number: 9588246
    Abstract: A data collection system 100 for estimating a corrected sound speed between a first point and a second point comprises a subsea acoustic transponder beacon (106) disposed at a fixed position relative to a seabed (108), and an acoustic transceiver (214) immersed below a sea surface (104) and above the acoustic beacon (106). A processing resource (200) is also operably coupled to the acoustic transponder (214), the acoustic transceiver (214) being arranged to traverse a path above the acoustic beacon (106) and communicate with the acoustic beacon (106). The processing resource (200) is also arranged to collect time-of-flight data associated with the communication between the acoustic transceiver (214) and the acoustic beacon (106).
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: March 7, 2017
    Assignee: Sonardyne International Limited
    Inventor: Christopher D. Pearce
  • Patent number: 9529107
    Abstract: A method for seismic prospecting in an aquatic medium using a device having at least one seismic cable provided with sensors and at least one moving seismic source. The method includes the following steps: 1) moving the cable in the water using two drones each placed at one end of the cable and which maintain tension in the cable, the movement of the cable minimizing the deviation of the cable with respect to a desired route in the terrestrial reference frame where the movement of the cable is also being restricted by a maximum track curvature value in the water, and, at the same time; and 2) moving the seismic source in a reference frame connected to the cable, emitting waves via the seismic source, and sensing reflections of the waves by the cable.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: December 27, 2016
    Assignee: KIETTA
    Inventor: Michel Manin
  • Patent number: 9377560
    Abstract: Various methods preserve or restore the low roughness throughout an outer shell of a device (e.g., a streamer) used underwater for seismic surveys, by applying various substances that fill micro-cracks, are easy to polish or are self-healing. Apparatuses used to implement these methods may be used shortly before the devices are deployed in water, for example, having the device passing through such an apparatus as it is moved to be deployed in water.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: June 28, 2016
    Assignee: CGG SERVICES SA
    Inventors: Raphaël MacQuin, Hélène Tonchia, Karine Desrues
  • Patent number: 9297919
    Abstract: A method and apparatus are provided for estimating an inter-node distance between a sender node and a receiver node belonging to a network comprising a plurality of nodes arranged along towed acoustic linear antennas. An acoustic signal is transmitted from the sender node to the receiver node through an underwater acoustic channel. The method includes estimating the inter-node distance as a function of an estimate of a sound speed profile of the underwater acoustic channel, the sound speed profile depending on depth.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: March 29, 2016
    Assignee: SERCEL
    Inventors: Christophe L'Her, Simon Vallez
  • Patent number: 9285495
    Abstract: Disclosed are apparatus and methods acoustic node positioning during a marine survey. In one embodiment, positions of a plurality of nodes are calibrated using acoustic transceivers. In addition, changes in the positions of the nodes are tracked using accelerometers. In another embodiment, a traveling wave is detected, and an effect of the traveling wave is projected on steering devices in a projected path of the traveling wave. Time-dependent control signals are computed and applied to the steering devices to maintain a local streamer geometry. Other embodiments, aspects, and features are also disclosed.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: March 15, 2016
    Assignee: PGS Geophysical AS
    Inventor: Michael B. Erneland
  • Patent number: 9217804
    Abstract: A method for identifying clock timing discrepancies in at least one clock of interest that is associated with a marine seismic receiver, comprises collecting from at least one marine receiver other than the receiver of interest a first data set corresponding to a selected time period, said first data set being selected to include ocean wave signals; collecting from the receiver of interest a second data set corresponding to the selected time period, said second data set being selected to include ocean wave signals; applying a mathematical prediction technique to the ocean wave signals in the first data set so as to generate a predicted response for a receiver co-located with the receiver of interest; comparing the predicted response to the second data set so as to generate a correlation data set; and using the correlation data set to determine a corrected parameter for the receiver of interest.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: December 22, 2015
    Assignee: Shell Oil Company
    Inventors: Paul James Hatchell, Kurang Jvalant Mehta
  • Patent number: 9188692
    Abstract: A method is proposed for acquiring seismic data relative to an area of the subsoil, wherein at least one seismic source is moved and seismic waves are emitted in successive shooting positions of the source so as to illuminate said area of the subsoil, and the signals resulting from this emissions are picked up using a set of cables having a substantially zero buoyancy and provided with receivers. The cables have a substantially zero speed or a speed substantially slower than the source in the terrestrial reference frame. And said successive shot positions are determined as a function of the position of the receivers relative to the terrestrial reference frame to optimize at least one quality criterion relating to the set of seismic signals acquired by the receivers in respect of said area. Such a method enables improved seismic data acquisition.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 17, 2015
    Assignee: KIETTA
    Inventor: Luc Haumonte
  • Patent number: 9158020
    Abstract: A microseismic method of determining the position of a downhole receiver (4) making use of received signals from events (21, 22) at least two known locations using the equivalent of a Thales circle construction from two or more pairs of events.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: October 13, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Leo Eisner, Joel Le Calvez
  • Patent number: 9052380
    Abstract: Method and system for determining positions of underwater sensors. The method includes sending a Doppler variant signal from a moving source; recording the signal with the at least one seismic sensor; evaluating a frequency drift of the recorded signal; and determining a position of the at least one seismic sensor based on the evaluated frequency drift and a source movement relative to the at least one sensor.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: June 9, 2015
    Assignee: Seabed Geosolutions AG
    Inventors: Olivier Winter, Thomas Bianchi
  • Publication number: 20150117148
    Abstract: A sensor streamer drag body system. At least some of the example embodiments include a system having a sensor streamer towable behind a vessel in a body of water, the sensor streamer defining a defining a distal end and a proximal end, the proximal end nearest the vessel. The system further includes a drag body coupled to the distal end of the sensor streamer, wherein the drag body remains submerged while the sensor streamer is deployed. The drag body includes an inertial navigation system. The inertial navigation system is configured to determine a position of the drag body, the drag body lacking an internal GPS.
    Type: Application
    Filed: February 19, 2014
    Publication date: April 30, 2015
    Applicant: PGS GEOPHYSICAL AS
    Inventors: Geir Andre Motzfeldt DRANGE, Torbjørn URSIN
  • Patent number: 9013953
    Abstract: A seismic survey system for recording seismic data underwater. The system includes first plural buoys configured to descend to a first predetermined depth (H1) in water, at least one buoy having a seismic receiver for recording the seismic data; a first vessel configured to launch the first plural buoys; and a first acoustic system attached to the first vessel and configured to detect a position of the at least one buoy while underwater. The at least one buoy is instructed to maintain the first predetermined depth (H1) underwater while recording the seismic data.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: April 21, 2015
    Assignee: CGGVeritas Services SA
    Inventor: Thierry Brizard
  • Patent number: 9001616
    Abstract: A method for simulating the positioning of at least one acoustic linear antenna towed in a study zone is provided. The method includes at least one simulation step of at least one future position of at least one point of the acoustic linear antenna(e), at least one step for predicting the temporal and spatial variations of at least one marine current likely to interact with the acoustic linear antenna(e) and at least one step for determining the form of the acoustic linear antenna(e) by the resolution of a hydrodynamic model. The prediction step(s) include an upstream phase for determining a current at at least two determined points of the zone; a simulation phase of at least one future position of the determined points; a temporal projection phase of the current determined during the upstream phase at each future position; and a spatial projection phase of the currents at at least two distinct points of the acoustic linear antenna(e) occupying future position(s) of the simulation step.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: April 7, 2015
    Assignee: Sercel
    Inventors: Clement Visseaux, Veronique L'Her
  • Patent number: 8994527
    Abstract: A device for collecting samples of the sea floor, including a collection apparatus, a diving apparatus and a control apparatus.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: March 31, 2015
    Inventor: Galen G. Verhulst
  • Publication number: 20150085609
    Abstract: In a first embodiment the invention comprises a method for gathering geophysical data, including towing geophysical data gathering equipment behind a survey vessel in a body of water, said equipment including an array of sensor streamers extending behind said vessel, and determining a geodetic location of a streamer steering reference point at a forward end of the sensor streamers and a reference direction. At least one sensor streamer included in said array of sensor streamers is laterally deflected in response to the determined geodetic location of said streamer steering reference point and the determined reference direction.
    Type: Application
    Filed: July 28, 2014
    Publication date: March 26, 2015
    Inventors: Øyvind Hillesund, Stian Hegna
  • Patent number: 8867305
    Abstract: A method of assisting the deployment/retrieval of linear acoustic antennas towed by a vessel, said linear antennas each having geophysical data sensors, means for measuring the distance of at least one adjacent linear antenna, during the course of which at least one of said linear acoustic antennas has at least longitudinal mobility in relation to said vessel, including: at least one phase for configuring cells (Cn) each defined by a central position corresponding to a distance-measuring means (T), and by at least one peripheral position corresponding to another distance-measuring means (T) in proximity to said distance-measuring means (T) for said central position, reference distances between said central positions and said peripheral positions being predetermined; and at least one phase for controlling said central and peripheral positions with respect to said reference distances, by establishing communication between at least some of said distance-measuring means (T).
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: October 21, 2014
    Assignee: Sercel
    Inventors: Gaëtan Mellier, Gilles Poete
  • Patent number: 8792297
    Abstract: In a first embodiment the invention comprises a method for gathering geophysical data, including towing geophysical data gathering equipment behind a survey vessel in a body of water, said equipment including an array of sensor streamers extending behind said vessel, and determining a geodetic location of a streamer steering reference point at a forward end of the sensor streamers and a reference direction. At least one sensor streamer included in said array of sensor streamers is laterally deflected in response to the determined geodetic location of said streamer steering reference point and the determined reference direction.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: July 29, 2014
    Assignee: PGS Geophysical AS
    Inventors: Øyvind Hillesund, Stian Hegna
  • Publication number: 20140160886
    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: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Applicant: WESTERNGECO L.L.C.
    Inventors: EVERHARD MUYZERT, KENNETH E. WELKER
  • Publication number: 20140153360
    Abstract: Method and streamer/source head-float system for connecting to a head portion of a streamer or to a lead-in or providing information about a source. The system includes a head-buoy configured to float in water and connected through a cable to the head portion of the streamer or to the lead-in; a head-float configured to float in water; a connector connecting the head-float to the head-buoy; and positioning equipment attached to the head-float and configured to determine a position of the streamer or the source.
    Type: Application
    Filed: October 25, 2013
    Publication date: June 5, 2014
    Applicant: CGG SERVICES SA
    Inventor: Helene TONCHIA
  • Patent number: 8724426
    Abstract: Methods for determining by acoustic ranging relative positions of marine seismic streamers in a network of streamers are described, as well as streamer configurations and systems which overcome weak or non-existent acoustic positioning signals. The acoustic network includes a plurality of acoustic transceiver pairs, and the methods include implementing a network solution-based reconfiguration of the acoustic transceiver pairs. When the network of streamers changes more than a critical amount, the network is reconfigured, the critical amount being when the network solution-based reconfiguration is no longer adequate to provide enough acoustic signals to give reasonable relative positions of the acoustic transceiver pairs in the network due to their spatial relation.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: May 13, 2014
    Assignee: WesternGeco L.L.C.
    Inventor: Kenneth E. Welker
  • Patent number: 8717845
    Abstract: A survey method includes towing one or more sources and one or more streamers behind a vessel to acquire geophysical survey data. Steering signals are determined for at least one of: the one or more sources, the one or more streamers, and the vessel. The steering signals minimize an error function having parameters that include a measure of a cross-line position error and a measure of data quality. The cross-line position error may be measured as an offset of the sources or the receivers from their desired paths, or in some embodiments as an offset between midpoints for base survey traces and subsequent survey traces. Some embodiments may employ a maximum spatial cross-correlation coefficient between a newly acquired trace and one or more base survey traces as a data quality measure, while others may employ a time shift, a phase rotation, or a normalized root mean square error. Data quality may indicate sensor noise levels.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: May 6, 2014
    Assignee: PGS Geophysical AS
    Inventors: Bengt Mikael Boberg, Jon Falkenberg, Anders Goran Mattsson
  • Patent number: 8687462
    Abstract: A method of obtaining information about the positions of sources in a marine seismic source array that has N seismic sources, including at least Nunique types of sources that are nominally non-identical to one another, where 1?Nunique?N?1. The method comprises measuring the pressure field at M independent locations of the N sources, where M>Nunique, and obtaining information about the positions of sources from the M pressure measurements and from the constraint that at least two of the sources are nominally identical to one another.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 1, 2014
    Assignee: WesternGeco L.L.C.
    Inventor: Jon-Fredrik Hopperstad
  • Publication number: 20140064026
    Abstract: A wave glider system includes a float having geodetic navigation equipment for determining a geodetic position and heading thereof. The glider includes an umbilical cable connecting the float to a sub. The sub has wings operable to provide forward movement to the float when lifted and lowered by wave action on the surface of a body of water. At least one geophysical sensor streamer is coupled to the sub. The at least one geophysical sensor streamer has a directional sensor proximate a connection between the sub and one end of the at least one geophysical sensor streamer to measure an orientation of the streamer with respect to a heading of the float.
    Type: Application
    Filed: July 18, 2013
    Publication date: March 6, 2014
    Applicant: Apache Corporation
    Inventors: David J. Monk, Michael S. Bahorich
  • Publication number: 20140029381
    Abstract: The present invention provides a method and apparatus for positioning a center of a seismic source. The method includes determining a desired center-of-source of the seismic source and selecting one of a first and a second plurality of guns to form the seismic source based upon the desired center-of-source, a center-of-source of the first plurality being different than a center-of-source of the second plurality.
    Type: Application
    Filed: October 1, 2013
    Publication date: January 30, 2014
    Applicant: WESTERNGECO L.L.C.
    Inventor: JON MAGNUS SÖRLI
  • Patent number: 8634270
    Abstract: According to one or more aspects of the invention, a marine seismic survey method comprises towing at least two streamers below a sea surface forming a survey spread, each streamer comprising a survey sensor and a profiler; and at each profiler, emitting an acoustic signal; recording an echo of the emitted signal at the profiler; and determining a parameter from the recorded echo, the parameter comprising at least one selected from the group of a distance between the profiler and the sea surface, a water current vector and a sea surface slope.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: January 21, 2014
    Assignee: WesternGeco L.L.C.
    Inventors: Svein Arne Frivik, Nicolas Goujon
  • Patent number: 8625387
    Abstract: A method for selecting a signal arrival for determining an accurate position of seismic equipment includes the steps of transmitting a signal from a pinger; predicting a direct arrival and a reflected arrival of the signal at a receiver, wherein each arrival is the time between the transmission of the signal to reception of the signal; measuring arrivals of the signal at the receiver; selecting the measured signal arrival that is similar to the predicted direct arrival as a preliminary signal arrival; defining a confidence interval for the actual direct arrival of the signal based on the predicted direct arrival and the predicted reflected arrival; and finalizing the signal arrival, wherein the selected preliminary signal arrival is the finalized signal arrival if it is within the confidence interval.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: January 7, 2014
    Assignee: WesternGeco L.L.C.
    Inventors: Svein Arne Frivik, Leendert Combee
  • Patent number: 8606440
    Abstract: A method for determining correction during steering of a point on an object towed by a towing device, the object point, toward a target position, the object being provided with a bird, including the steps of determining a target position; determining the position of the object point, determining the speed and acceleration of the object point and directions of these and thereby determining an inline direction; determining whether the inline is directed toward the target position and if it deviates from the desired direction, determining a distance vector between the object point and the target position; calculating the object point distance, speed and acceleration components at least in the lateral direction or the vertical direction; and transferring values for the components to a control system for the corresponding bird.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: December 10, 2013
    Assignee: Geograf AS
    Inventor: Peder Solheim
  • Patent number: 8582394
    Abstract: A method for determining geodetic position of at least one point on a geophysical sensor streamer towed by a vessel in a body of water includes determining geodetic positions of a plurality of locations along a first geophysical sensor streamer towed at a first depth in the body of water. A lateral offset is caused between the first geophysical sensor streamer and a second geophysical sensor streamer towed at a second depth in the body of water. A distance is measured between at least two selected points along the first geophysical sensor streamer and a selected point along the second geophysical sensor streamer. A depth is measured at at least one point along the second geophysical sensor streamer. A geodetic position is determined at a selected point along the second geophysical sensor using the depth measurement, a direction of the lateral offset and the measured distances.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: November 12, 2013
    Assignee: PGS Geophysical AS
    Inventors: Gustav Göran Mattias Südow, Jon Falkenberg, Bengt Rickard Finnoen
  • Publication number: 20130258807
    Abstract: Disclosed are apparatus and methods acoustic node positioning during a marine survey. In one embodiment, positions of a plurality of nodes are calibrated using acoustic transceivers. In addition, changes in the positions of the nodes are tracked using accelerometers. In another embodiment, a traveling wave is detected, and an effect of the traveling wave is projected on steering devices in a projected path of the traveling wave. Time-dependent control signals are computed and applied to the steering devices to maintain a local streamer geometry. Other embodiments, aspects, and features are also disclosed.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 3, 2013
    Inventor: Michael B. ERNELAND
  • Patent number: 8520468
    Abstract: A method and system for controlling the shape and separation of an arrangement of streamers towed behind a survey vessel. Each streamer is steered laterally by lateral steering devices positioned along its length at specific nodes. Each streamer is driven by its lateral steering devices to achieve a specified separation from a neighboring streamer. One of these actual streamers, used as a reference by the other actual streamers, is steered to achieve a specified separation from an imaginary, or ghost, streamer virtually towed with the actual streamers.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: August 27, 2013
    Assignee: ION Geophysical Corporation
    Inventors: Daniel B. Seale, John Edward Grant, David A. Cespedes M.
  • Publication number: 20130208565
    Abstract: Computational systems and methods, to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. An exploration-seismology vessel tows a number of streamers that form a smoothly varying data acquisition surface located beneath a fluid surface. In one aspect of this disclosure, the method determines a set of image points that represent a profile of the fluid surface above each streamer. The image points are determined based on pressure and velocity wavefields measured at dual sensors of the streamer. The method then determines an elevation parameter of the image points that minimizes DC offset in a spectral domain of the image points. The elevation parameter corresponds to the streamer-depth bias and can be used to correct for the streamer-depth bias in subsequent calculations of a fluid-surface profile.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 15, 2013
    Applicant: PGS Geophysical AS
    Inventors: Okwudili Orji, Walter Söllner
  • Publication number: 20130188451
    Abstract: A seismic survey system for recording seismic data underwater. The system includes first plural buoys configured to descend to a first predetermined depth (H1) in water, at least one buoy having a seismic receiver for recording the seismic data; a first vessel configured to launch the first plural buoys; and a first acoustic system attached to the first vessel and configured to detect a position of the at least one buoy while underwater. The at least one buoy is instructed to maintain the first predetermined depth (H1) underwater while recording the seismic data.
    Type: Application
    Filed: January 8, 2013
    Publication date: July 25, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • Patent number: 8483008
    Abstract: The technique disclosed herein includes a method and apparatus for controlling streamer steering devices to maintain a coil streamer shape that gives coverage for a coil shooting plan. The technique uses solved positions and a target coil streamer shape identified in the shooting plan to determine steering instructions to the streamer steering devices along the streamer.
    Type: Grant
    Filed: November 8, 2008
    Date of Patent: July 9, 2013
    Assignee: WesternGeco L.L.C.
    Inventor: Kenneth E. Welker
  • Patent number: 8477560
    Abstract: To determine a position of an object in a positioning network associated with a marine survey arrangement, images of targets on the object in the positioning network are captured with a plurality of cameras. Based on known positions of the plurality of cameras and known separation between the targets, positions of the targets are computed by processing the images. A position of the object is derived based on the positions of the targets.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: July 2, 2013
    Assignee: WesternGeco L.L.C.
    Inventor: Kenneth E. Welker
  • Publication number: 20130155808
    Abstract: A method and apparatus are provided for estimating an inter-node distance between a sender node and a receiver node belonging to a network comprising a plurality of nodes arranged along towed acoustic linear antennas. An acoustic signal is transmitted from the sender node to the receiver node through an underwater acoustic channel. The method includes estimating the inter-node distance as a function of an estimate of a sound speed profile of the underwater acoustic channel, the sound speed profile depending on depth.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 20, 2013
    Applicant: SERCEL
    Inventor: SERCEL
  • Publication number: 20130155809
    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: Application
    Filed: December 19, 2012
    Publication date: June 20, 2013
    Applicant: SERCEL
    Inventor: SERCEL
  • Publication number: 20130155807
    Abstract: A method for determining geodetic position of at least one point on a geophysical sensor streamer towed by a vessel in a body of water includes determining geodetic positions of a plurality of locations along a first geophysical sensor streamer towed at a first depth in the body of water. A lateral offset is caused between the first geophysical sensor streamer and a second geophysical sensor streamer towed at a second depth in the body of water. A distance is measured between at least two selected points along the first geophysical sensor streamer and a selected point along the second geophysical sensor streamer. A depth is measured at at least one point along the second geophysical sensor streamer. A geodetic position is determined at a selected point along the second geophysical sensor using the depth measurement, a direction of the lateral offset and the measured distances.
    Type: Application
    Filed: December 15, 2011
    Publication date: June 20, 2013
    Inventors: Gustav Göran Mattias SÜDOW, John FALKENBERG, Bengt Richard FINNOEN
  • Patent number: 8462582
    Abstract: A method for assistance in the localization of streamers towed by a vessel including at least one onboard acoustic controller, each streamer having: geophysical data sensors; acoustic means for measuring distance from at least one adjacent linear antenna; and means for the absolute localization of said antennas. The method includes at least one phase for the generating an acoustic cycle determining sequences and at least one phase for defining at least two distinct acoustic cycles representing a theoretical geometry capable of representing the shape of said streamers; at least one step for determining the real geometry of said streamers; at least one step for detecting a change in real geometry followed by a step for generating a new acoustic cycle, selected from among those defined during said phase for defining and adapted to said change in real geometry.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: June 11, 2013
    Assignee: Sercel
    Inventors: Gaëtan Mellier, Gilles Poete
  • Patent number: 8456948
    Abstract: A technique includes obtaining first measurements acquired by sensors of a towed seismic streamer, which are indicative of an inclination of the streamer. Based at least in part on the measurements, a shape of the streamer while in tow is determined.
    Type: Grant
    Filed: June 28, 2008
    Date of Patent: June 4, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Nicolas Goujon, Johan O. A. Robertsson
  • Publication number: 20130121107
    Abstract: Computing device and method for generating an image of a subsurface. The method calculates an offset shift of measured offsets between a seismic source and plural receivers of a streamer. The method includes receiving seismic data recorded underwater by the plural receivers; selecting two pairs of traces from the plural traces and for each pair, calculating a quantity Y that depends on measured offsets of receivers for which the traces were selected, and a quantity X that depends on travel-times and the measured offsets of the receivers for which the traces were selected; calculating a linear relation Y=aX+b, where “a” is a constant and “b” is related to the offset shift; estimating the offset shift from “b”; correcting the measured offsets of the receivers based on the offset shift; and calculating the image of the subsurface based on the corrected offsets.
    Type: Application
    Filed: June 11, 2012
    Publication date: May 16, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Ziqin YU