Patents Assigned to PGS Geophysical AS
  • INLINE SOURCE
    Publication number: 20200271806
    Abstract: An inline source can be used for a marine survey. For example, a marine survey vessel can tow source units in line. The source units can be actuated near-continuously to cause a respective signal emitted by each of the source units to be uncorrelated with signals emitted by other of the source units.
    Type: Application
    Filed: February 18, 2020
    Publication date: August 27, 2020
    Applicant: PGS Geophysical AS
    Inventors: Stian Hegna, Tilman Kluver
  • Seismic Source With Chamber For Housing Wave Generator
    Publication number: 20200264326
    Abstract: This disclosure is related generally to marine surveying. An apparatus for generation of seismic waves in a body of water may include a wave generator. The apparatus may further include a housing defining an internal chamber having an open end. The housing may include baffles positioned between the open end and the wave generator. The housing may further include a vent positioned on an opposite end of the housing from the baffles.
    Type: Application
    Filed: February 11, 2020
    Publication date: August 20, 2020
    Applicant: PGS Geophysical AS
    Inventor: Rick Irving
  • Absolute strength and absolute sensitivity in seismic data
    Patent number: 10739483
    Abstract: The present disclosure is related to absolute strength and absolute sensitivity in seismic data. Seismic data from a marine survey can be received. The seismic data can be calibrated based on an absolute strength of a seismic source and an absolute sensitivity of a seismic receiver. The calibrated seismic data can be processed.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: August 11, 2020
    Assignee: PGS Geophysical AS
    Inventors: John W. C. Sherwood, Kevin J. S. Sherwood
  • Method for adjusting attributes of marine seismic survey data
    Patent number: 10732311
    Abstract: Techniques are disclosed relating to reducing noise in marine seismic survey data. A shot-by-shot depth migration of recorded marine seismic survey data that includes multiples wavefields indicative of surface reflections may be performed. Post-migration data generated by the migration may include angle information derived from the multiples wavefields. Attributes of the marine seismic survey data may be corrected using the angle information in order to identify a potential sub-surface structure.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 4, 2020
    Assignee: PGS Geophysical AS
    Inventors: Julien Oukili, Didier Lecerf, Darryl James Anderson
  • Noise reduction for total field magnetometer measurements
    Patent number: 10725199
    Abstract: A method and apparatus for a streamer having a total field magnetometer (“TFM”). A streamer includes a plurality of TFMs in proximity with one another and distributed symmetrically about an axis of the streamer. A streamer includes a first subset of TFMs in a streamer section and in proximity with one another; a second subset in the streamer section and in proximity with one another; wherein the first subset is not in proximity with the second subset. A method includes towing a streamer through a body of water, the streamer comprising first and second TFMs; acquiring magnetic data with the first and the second TFMs; and reducing noise in the data based on at least one of: averaging data from the first and the second TFMs; filtering data from the first and the second TFMs; estimating motion of the first TFM; and estimating rotation of the first TFM.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: July 28, 2020
    Assignee: PGS Geophysical AS
    Inventors: Peter Lindqvist, Robert Juhasz, Johan Mattsson
  • Streamer cleaning apparatus and associated systems and methods
    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
  • System for source towing at depth
    Patent number: 10703445
    Abstract: An apparatus for towing geophysical sources includes a housing; a first geophysical source disposed in the housing so that the first geophysical source is partially exposed to a surrounding environment; and a plurality of ballast tanks coupled to the housing and configured to at least one of: change a buoyancy of the source towing system; and shift a center of mass of the source towing system. A method of towing a geophysical source includes towing a source towing system through a body of water at a towing depth; and operating a plurality of ballast tanks of the source towing system to at least one of: change a buoyancy of the source towing system; and shift a center of mass of the source towing system.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: July 7, 2020
    Assignee: PGS Geophysical AS
    Inventors: Mattias Oscarsson, Thomas Hvesser
  • Marine data acquisition node
    Patent number: 10705239
    Abstract: Disclosed are systems and methods for marine geophysical surveying. An example system an electromagnetic source configured to emit an energy field into a body of water; a marine data acquisition node comprising: a base having a buoyancy such that the base is configured to float in a body of water; a geophysical sensor coupled to the base; a weight configured to anchor the marine data acquisition node to a water bottom; and a line connected between the weight and the base configured to prevent the base from floating to a surface of the body of water.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: July 7, 2020
    Assignee: PGS Geophysical AS
    Inventor: Andras Robert Juhasz
  • Determining sea water resistivity
    Patent number: 10705241
    Abstract: Methods of geophysical prospecting are described herein. In the described methods, a data set of electromagnetic readings from a marine geophysical survey is obtained and loaded into a computer processing system. Using the computer processing system, a high-frequency subset of the data is selected based on a frequency threshold, and a seawater resistivity map is resolved from the subset for a seawater portion of the survey by inversion. The seawater resistivity map can subsequently be used to resolve a resistivity map of the seabed from the data set by inversion.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: July 7, 2020
    Assignee: PGS Geophysical AS
    Inventors: Tashi Tshering, Allan McKay, Johan Mattsson, Kathrin Flisnes Bergh
  • Medetomidine Compositions Having Improved Anti-Fouling Characteristics
    Publication number: 20200200928
    Abstract: Embodiments generally relates to marine geophysical surveying. More particularly, the present disclosure relates to treatment of geophysical equipment with medetomidine compounds for reduction of marine growth. A method may comprise combining at least a medetomidine compound and a wax to form a mixture; and forming an outer layer disposed on a marine geophysical equipment, wherein the outer layer comprises the mixture of the medetomidine compound and the wax.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 25, 2020
    Applicant: PGS Geophysical AS
    Inventors: Christian Vasbø, Rune Tønnessen
  • Reconfigurable Seismic Sensor Cable
    Publication number: 20200200927
    Abstract: Embodiments relate to a sensor cable that may be reconfigurable to have various combinations of seismic sensors. An apparatus may comprise a sensor cable and seismic sensors distributed throughout a volume of the sensor cable and along all three axes of the sensor cable, wherein the seismic sensors are assigned to sampling groups that are reconfigurable and not hardwired.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 25, 2020
    Applicant: PGS Geophysical AS
    Inventors: Robertus Franciscus Hegge, Roald G. van Borselen
  • Marine Surveying Using a Source Vessel
    Publication number: 20200200934
    Abstract: An actuation location for actuation of a first source coupled to a first marine survey vessel relative to a position of a second marine survey vessel towing a receiver to enhance illumination of a subsurface location can be determined based on a survey route of the second marine survey vessel and a priori data of the subsurface location. The first marine survey vessel can be navigated along a survey route of the first marine survey vessel to the actuation location during a marine survey by changing at least a cross-line position or an in-line position of the first marine survey vessel relative to the survey route of the second marine survey vessel.
    Type: Application
    Filed: December 17, 2019
    Publication date: June 25, 2020
    Applicant: PGS Geophysical AS
    Inventors: Christian Strand, Edwin Thomas Hodges
  • Amplitude-versus-angle analysis for quantitative interpretation
    Patent number: 10690792
    Abstract: Amplitude-versus-angle analysis for quantitative interpretation can include creation of a plurality of angle gathers from imaging a subsurface location with multiples in a near-offset range and imaging primaries outside the near-offset range and application of an amplitude-versus-angle analysis to the plurality of angle gathers to produce a quantitative interpretation pertaining to the subsurface location.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: June 23, 2020
    Assignee: PGS Geophysical AS
    Inventors: Grunde Rønholt, Nizar Chemingui, Alejandro Antonio Valenciano Mavilio, Shaoping Lu
  • BRIDLE BITE ADJUSTMENT
    Publication number: 20200191986
    Abstract: A system for bridle bite adjustment can include a tow rope coupled to a paravane at a first position on a lever arm and a spur line coupled to the paravane at a second position on the lever arm. The system can also include a winch to adjust a deployed length of the tow rope. The tow rope and the lever arm can adjust a bridle bite of the paravane by when the deployed length of the tow rope is adjusted by the winch, thereby balancing tension between the tow rope and the spur line.
    Type: Application
    Filed: December 16, 2019
    Publication date: June 18, 2020
    Applicant: PGS Geophysical AS
    Inventor: Daniel Lindberg
  • DEBLENDED AND DEGHOSTED SEISMIC DATA
    Publication number: 20200174146
    Abstract: Deblending and deghosting seismic data may include processing blended seismic data acquired after actuation of a first seismic source located at a first depth and a second seismic source located at a second depth. The processing may comprise deblending and deghosting the blended seismic data based on a difference in ghost responses of the first seismic source and the second seismic source.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 4, 2020
    Applicant: PGS Geophysical AS
    Inventor: Gert-Jan Adriaan van Groenestijn
  • Piston integrated variable mass load
    Patent number: 10670747
    Abstract: Embodiments relate to relate to marine vibrators that incorporate one or more piston plates that act on the surrounding water to produce acoustic energy. An example marine vibrator may comprise: a containment housing; a piston plate; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and the fixture; a driver disposed in the marine vibrator, wherein the driver is coupled to the piston plate and the fixture; and a container coupled to the piston plate, wherein the container is configured to hold a variable mass load; wherein the marine vibrator has a resonance frequency selectable based at least in part on the variable mass load.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: June 2, 2020
    Assignee: PGS Geophysical AS
    Inventor: Stig Rune Lennart Tenghamn
  • Displacement sensor device and system
    Patent number: 10670622
    Abstract: The present invention relates to a displacement sensor device and the system including the device, wherein the device comprises a first at least partially transparent plane surface with a first diffraction pattern and a second plane surface comprising a second reflecting diffraction pattern. The diffractive patterns being adapted to diffract light within a chosen range of wavelengths, the second surface being positioned below and parallel to the first surface constituting a pair wherein said first and second diffractive patterns being essentially equal, the device also comprising displacement means for allowing a movement in a direction parallel to said surfaces, the device thus providing a movement sensitive diffraction pattern.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: June 2, 2020
    Assignee: PGS Geophysical AS
    Inventors: Ib-Rune Johansen, Matthieu Lacolle, Thor Bakke, Andreas Vogl, Dag Thorstein Wang, Sverre Knudsen, Odd Løvhaugen, Hallvard Angelskår, Zeljko Skokic
  • Methods and systems for quantifying coherency and constraining coherency-based separation in simultaneous shooting acquisition
    Patent number: 10670757
    Abstract: This disclosure presents methods and systems for deblending blended seismic data obtained during simultaneous shooting acquisition into deblended seismic data gathers. Methods and systems iteratively separate the blended seismic data into the deblended seismic data gathers based on semblance analysis of a residual difference between the blended seismic data and the deblended seismic data gathers. Each deblended seismic data gather is associated with one of the sources and appears to have been obtained without substantial interference from seismic energy produced by other sources.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: June 2, 2020
    Assignee: PGS Geophysical AS
    Inventor: Rolf Huibert Baardman
  • Steerable marine geophysical source
    Patent number: 10670760
    Abstract: A method for geophysical source steering including towing a first geophysical source through a body of water; and adjusting a first steering parameter of the first geophysical source while towing the first geophysical source. An apparatus for geophysical source steering including a first marine vibrator source having a first housing structure; a first vibrational surface functionally coupled to the first housing structure such that at least a portion of the first vibrational surface can vibrate relative to the first housing structure; and first steering control equipment.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: June 2, 2020
    Assignee: PGS Geophysical AS
    Inventors: Anders Göran Mattsson, Stig Rune Lennart Tenghamn
  • Constraint of Dithering of Source Actuations
    Publication number: 20200150303
    Abstract: A system for constraining a dither time can comprise a source and a controller coupled to the source. The controller can be configured to actuate the source in sequence, while the source is moving through a fluid volume at a bottom speed, with an actuation time interval between each actuation comprising a sum of a nominal time and a dither time for each actuation and constrain the dither time for each actuation such that a reduction of the actuation time interval relative to a directly precedent actuation time interval is at most a threshold dither time difference, wherein the threshold dither time difference corresponds to a maximum bottom speed.
    Type: Application
    Filed: January 15, 2020
    Publication date: May 14, 2020
    Applicant: PGS Geophysical AS
    Inventors: Manuel Beitz, Christian Strand, Rolf Huibert Baardman