Patents Assigned to CGG SERVICES
  • Modeling an elastic stiffness tensor in a transverse isotropic subsurface medium
    Patent number: 9874652
    Abstract: Modeling an elastic stiffness tensor in a transverse isotropic subsurface medium acquires well log data for at least one well passing through the transverse isotropic subsurface medium. The transverse isotropic subsurface medium is divided into an effective anisotropic layer and an isotropic layer. The effective anisotropic layer elastic parameters are modeled, and the isotropic layer elastic parameters are modeled using the effective anisotropic layer elastic parameters and the acquired well log data. The modeled effective anisotropic layer elastic parameters and the modeled isotropic layer elastic parameters are used to upscale the effective anisotropic layer and the isotropic layer into the transverse isotropic subsurface medium comprising a single layer and to determine the five members of the elastic stiffness tensor for the transverse isotropic subsurface medium.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: January 23, 2018
    Assignee: CGG SERVICES SAS
    Inventor: Reza Saberi
  • Methods and systems for monitoring a subsurface formation with a land active streamer
    Patent number: 9869789
    Abstract: The present disclosure includes a method for monitoring a subsurface formation including disposing an antenna in a horizontal wellbore, the antenna including a plurality of piezoelectric modules. A voltage signal is applied to at least one of the piezoelectric modules to cause the at least one piezoelectric modules to emit seismic energy into the subsurface formation. A resulting signal is received at a receiver. A property of the subsurface formation is determined based, at least in part, on the resulting signal.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: January 16, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Julien Cotton, François-Xavier Grésillon
  • Coherent noise attenuation method
    Patent number: 9864084
    Abstract: Computing device, computer instructions and method for denoising input seismic data d. The method includes receiving the input seismic data d recorded in a first domain by seismic receivers, wherein the input seismic data d includes pure seismic data ss relating to an exploration source and coherent noise data n generated by a man-made device; generating a model m in a second domain to describe the input seismic data d; and processing the model m to obtain an output seismic dataset d? indicative of seismic data substantially free of the coherent noise data n generated by the man-made device.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: January 9, 2018
    Assignee: CGG SERVICES SAS
    Inventor: Gordon Poole
  • System and method for modelling three dimensional shallow water multiples using predictive sea floor reconstruction
    Patent number: 9864097
    Abstract: A method for modeling shallow water multiples modeling using a predicted sea floor reconstruction is provided. A seafloor reflectivity image is reconstructed using acquired seismic data. Surface multiples are determined by evaluating a seismic wave equation using, as an input, the reconstructed seafloor reflectivity image. The determined surface multiples are subtracted from the acquired seismic data.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: January 9, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Antonio Pica, Sylvain Le Roy
  • System and method for ray based tomography guided by waveform inversion
    Patent number: 9857489
    Abstract: Disclosed herein is a system and method for building a velocity model for a geographical area of interest (GAI). The system and method comprise determining a ray based tomography velocity image of said GAI using acquired data, determining a high resolution velocity guide (HRVG) image of said GAI, scaling said determined HRVG of said GAI, adding the scaled HRVG to the ray based tomography velocity image to determine an updated ray based tomography velocity image, and determining whether said updated ray based tomography velocity image has experienced convergence by determining whether a cost function of said ray based tomography velocity image does not improve compared to a previously determined cost function value of said ray based tomography velocity image.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: January 2, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Gilles Lambare, Thibaut Allemand
  • Variable-depth seismic source and method
    Patent number: 9857492
    Abstract: Method and marine acoustic source array for generating an acoustic wave in a body of water. The marine acoustic source array includes at least one sub-array. The at least one sub-array includes a float from which plural source points are attached. The source points may be provided on a curved line, straight line, or other desired shape so that a variable-depth source is obtained with a single float. The source points may be divided into groups and the groups may be provided on the curved line, straight line or other desired shape.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: January 2, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Robert Dowle, Thierry Payen
  • Low frequency emission and recording for seismic data acquisition
    Patent number: 9835745
    Abstract: Presented are methods and systems for collecting marine seismic data. The collected seismic data can be low frequency (e.g., less than 10 Hz) or it can be a full seismic bandwidth (1-200 Hz) depending on if the low frequency tuned sources and tuned receivers are combined with conventional sources and receivers. The low frequency sources can be towed or they can be autonomous and positioned in the survey area by tether, drifting or self-propelled. The tuned low frequency receivers are towed at a depth greater than conventional receivers and the sources can be fired independently or simultaneously.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: December 5, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Karine Desrues
  • Buoy based marine seismic survey system and method
    Patent number: 9835750
    Abstract: A seismic survey system for recording seismic data underwater in the presence of underwater currents. The system includes first plural buoys configured to descend in water at a predetermined depth (H1) and each having a seismic receiver for recording the seismic data; a first vessel configured to launch the first plural buoys along a first line; and a second vessel configured to recover the first plural buoys at a second line, wherein there is a predetermined distance between the first and second lines. The first plural buoys are configured to travel underwater, at substantially the first predetermined depth (H1), from the first line to the second line, due exclusively to the underwater currents.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: December 5, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Thierry Brizard
  • Method and system for augmenting low-frequency range of seismic survey
    Patent number: 9829588
    Abstract: Method and resonant source for generating low-frequency seismic waves. The resonant source includes a frame; a reaction mass configured to oscillate relative to the frame; a resonant suspension system connecting the reaction mass to the frame and including at least a spring; and a spring clamp system connected to the resonant suspension system and configured to modify a resonant frequency of the resonant suspension system. The resonant suspension system is configured to allow the reaction mass to oscillate relative to the frame with a corresponding resonant frequency.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: November 28, 2017
    Assignee: CGG SERVICES SAS
    Inventors: John Sallas, Thomas Bianchi
  • Methods and underwater bases for using autonomous underwater vehicle for marine seismic surveys
    Patent number: 9828077
    Abstract: An underwater base for handling plural underwater vehicles equipped with seismic sensors for recording seismic signals during a marine seismic survey. The underwater base including a storing part configured to store the plural underwater vehicles; an inlet part located above the storing part and configured to control access of the plural underwater vehicles to the storing part; a control part configured to acoustically guide the plural underwater vehicles to the inlet part; and a support part configured to support the control part, the storing part and the inlet part. The storing part is further configured to receive the plural underwater vehicles as the plural underwater vehicles fall from the inlet part into the storing part.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: November 28, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Antoine Lelaurin, Thierry Brizard
  • System and method for correcting near surface statics by using internal multiples prediction
    Patent number: 9823369
    Abstract: Disclosed is a system and method for predicting internal multiples generators to correct near surface statics, by estimating a first timing or position associated with reflectors using internal multiple generators identified based on predictive deconvolution operators, estimating a second timing or position associated with the reflectors using the acquired seismic surface data, comparing the first timing or position with the second timing or position for each of the reflectors to determine a travel time delay associated with the reflectors, and correcting the acquired seismic surface data using the travel time delay.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: November 21, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Antonio Pica
  • Vibro seismic source separation and acquisition
    Patent number: 9804283
    Abstract: Methods and systems for separating seismic data acquired using a plurality of substantially simultaneously fired sources are described. The sources use sweep sequences having low cross correlation levels to generate seismic waves, and their source signatures are determined. Using the source signatures, the wave fields associated with each of the sources are extracted from the seismic data by, for example, performing a time domain deconvolution.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: October 31, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Matthieu Guillouet, Olivier Winter, Thomas Bianchi
  • Ghost-suppression optimized seismic source and method
    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
  • Regularization of multi-component seismic data
    Patent number: 9798025
    Abstract: Presented are methods and systems for regularizing content of multi-component seismic data. The method includes a step of receiving the seismic data, wherein the seismic data includes pressure and particle motion measurements and a step of regularizing and frequency optimizing the seismic data to desired positions based on Fresnel zones selected at various depths in a subsurface to obtain a regularized seismic dataset.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: October 24, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Thomas Elboth
  • Apparatus and method for seismic data acquisition with simultaneous activation of clustered vibrators
    Patent number: 9791578
    Abstract: Methods for seismic exploration of a subsurface formation increase productivity by simultaneously actuating closely located vibratory sources. Individual vibrations generated by different sources actuated simultaneously are encoded to enable separation of seismic data corresponding to each of the individual vibrations.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: October 17, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Thomas Bianchi, Julien Meunier, Olivier Winter
  • Method and system for simultaneous acquisition of pressure and pressure derivative data with ghost diversity
    Patent number: 9791581
    Abstract: A marine streamer spread for acquiring seismic data, the spread including a streamer having a first portion and a second portion; the first portion including both first pressure sensors and pressure derivative sensors for acquiring the seismic data; and the second portion including second pressure sensors. The first portion imparts ghost diversity to the seismic data by having a variable-depth profile and the pressure derivative sensors impart polarity diversity to the seismic data.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: October 17, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Risto Siliqi, Karine Desrues
  • Method and device for controlling source array geometry
    Patent number: 9784872
    Abstract: Methods related to controlling a source array while performing a seismic survey to achieve an intended source signature. A current three dimensional arrangement of the individual seismic sources is compared with a target 3D arrangement. In view of the comparison, position of at least one of the individual seismic sources is adjusted so that the adjusted 3D arrangement of the individual seismic sources to substantially match the target 3D arrangement.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: October 10, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Helene Tonchia
  • Demultiple using up/down separation of towed variable-depth streamer data
    Patent number: 9784870
    Abstract: Methods and systems for processing data acquired using a variable-depth streamer, obtain up-going and down-going wavefields at a predetermined datum, and use them to identify multiples included in the up-going wavefield. An image of a geological formation under the seabed is then generated using the data from which the multiples have been removed, and/or the multiples.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: October 10, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Gordon Poole, Simon King
  • Mixed sequential and simultaneous source acquisition and system
    Patent number: 9784864
    Abstract: Systems and methods for acquiring blended and unblended seismic data during a single seismic survey. The blended and unblended seismic data is generated with a plurality of sources that are fired in a dedicated sequence. The sequence involves firing all the sources at a first time, advancing the sources along a given path, firing only a first source at a second time, later than the first time, advancing the sources, firing again all the sources at a third time, later than the second time, advancing the sources, firing only a second source at a fourth time, later than the third time, and so on until a desired subsurface is fully surveyed.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: October 10, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Damien Grenie, Thomas Mensch, Risto Siliqi
  • Method and apparatus for deghosting seismic data
    Patent number: 9784868
    Abstract: Apparatus, computer instructions and method for deghosting seismic data related to a subsurface of a body of water. The method includes inputting data recorded by detectors that are towed by a vessel, the data being associated with waves travelling from the subsurface to the detectors; applying a migration procedure to the data to determine a first image of the subsurface; applying a mirror migration procedure to the data to determine a second image of the subsurface; joint deconvoluting the first image and the second image for deghosting a reflectivity of the subsurface; and generating a final image of the subsurface based on the deghosted reflectivity of the joint deconvoluting step.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: October 10, 2017
    Assignee: CGG SERVICES SAS
    Inventor: Robert Soubaras