Patents Assigned to CGGVeritas Services SA
  • METHOD AND APPARATUS FOR DEGHOSTING SEISMIC DATA
    Publication number: 20130242695
    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: Application
    Filed: April 26, 2013
    Publication date: September 19, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Robert SOUBARAS
  • STEERING SUBMERSIBLE FLOAT FOR SEISMIC SOURCES AND RELATED METHODS
    Publication number: 20130242694
    Abstract: Seismic sources including a steerable submersible float and related methods are provided. A seismic source includes a submersible float and a plurality of individual sources. The submersible float is configured to control at least one of a depth and a horizontal position of the submersible float by adjusting angles of one or more rotatable surfaces attached to the submersible float. The individual sources hang under the submersible float and are configured to operate at a depth larger than the depth of the submersible float.
    Type: Application
    Filed: March 16, 2012
    Publication date: September 19, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Zhaohong WU
  • DEFLECTOR FOR MARINE DATA ACQUISITION SYSTEM
    Publication number: 20130239864
    Abstract: Deflectors configured to be attached to cables towed behind a vessel for performing a marine survey are provided. A deflector has a wing body including a first part joined to a second part to form a swept-back-wing shape, the first part and the second part being substantially coplanar. A first straight line stretching along at least a portion of a front edge of the first part makes a first angle with a second straight line stretching along at least a portion of a front edge of the second part. A third straight line stretching along at least a portion of a trailing edge of the first part makes a second angle with a fourth straight line stretching along at least a portion of a trailing edge of the second part, the first angle and the second angle being non-zero angles.
    Type: Application
    Filed: September 7, 2012
    Publication date: September 19, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Hervé RICHER DE FORGES
  • SEISMIC DATA PROCESSING AND APPARATUS
    Publication number: 20130242699
    Abstract: There is a method of seismic data processing that includes receiving seismic data that includes a set of seismic traces, each trace including a signal recorded by a sensor after having been propagated in a subsurface area; migrating the seismic data according to a first velocity model; picking from the time-migrated seismic data one or more events corresponding to one or more subsurface reflectors so as to obtain a set of facets locally approximating the event; kinematic demigrating the picked set of facets so as to obtain simplified seismic data that includes the set of facets and a set of attributes associated with the set of facets; migrating the set of facets based on a second velocity model; and updating the initial velocity model based on an alignment of migrated points within the set of facets.
    Type: Application
    Filed: April 23, 2013
    Publication date: September 19, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventors: Gilles LAMBARE, Jean-Paul TOURE, Ziqin YU
  • SEISMIC REFLECTION FULL WAVEFORM INVERSION FOR REFLECTED SEISMIC DATA
    Publication number: 20130238249
    Abstract: A system and method are described herein for generating a velocity model of returned seismic signals for under-ocean floor environments. The system and method generate a series of source signals, receive a corresponding set of direct signals, reflected signals, and refracted signals, solve a velocity model equation using a full waveform inversion function with respect to the received set of direct signals, reflected signals and refracted signals to minimize a least square misfit function by relaxing a dependency on low frequency reflections in the full waveform inversion function. The system and method then generate the velocity model based on the solution to the velocity model equation, and display the velocity model.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventors: Sheng XU, Feng CHEN, Gilles LAMBARE, Yu ZHANG
  • Method and device to acquire marine seismic data
    Patent number: 8531912
    Abstract: The invention concerns a method to acquire seismic waves by means of a streamer towed by a vessel and comprising a plurality of seismic receivers. The streamer comprises a head portion that is slanted relative to the water surface and a tail portion having at least one section with a different slant.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: September 10, 2013
    Assignee: Cggveritas Services SA
    Inventor: Robert Soubaras
  • CONNECTING DEVICE FOR WIDE TOW SURVEY
    Publication number: 20130215713
    Abstract: Marine seismic survey using an array (6) of streamers (8) towed behind a vessel (2) and carrying acoustic sources (4) and sensors (10), spreading means (12, 14, 22, 23, 24) for keeping the streamers (8) at a given distance by lateral tensioning, and bridles (16) for connecting the spreading means and towing ropes and cables. The bridles (16) are comprising at least one solid link or connection device (26) for releasable connection to lines under tension and extending in different directions.
    Type: Application
    Filed: August 17, 2011
    Publication date: August 22, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Martin Hartland
  • METHOD, DEVICE AND NODE FOR SEABED SEISMIC ACQUISITION
    Publication number: 20130215714
    Abstract: The invention concerns a method for seabed seismic acquisition. According to the invention, a pair of geophones (3a, 3b) is placed on the seabed and mounted in opposite directions so that the axes of maximum sensitivity of the geophones lie substantially orthogonal to the surface of the seabed. The invention also concerns a device for seismic acquisition and a seabed seismic node.
    Type: Application
    Filed: December 22, 2011
    Publication date: August 22, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Julien Meunier
  • CATENARY SOURCE STEERING GEAR AND METHOD
    Publication number: 20130208564
    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: Application
    Filed: February 12, 2013
    Publication date: August 15, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • SWEEP DESIGN FOR SEISMIC SOURCES
    Publication number: 20130201799
    Abstract: A system and method are described herein for generating a frequency sweep signal set for use in seismic data gathering. Low frequency sweep rate modifications are combined to compensate for vibrator limitations and vibrator far-field responses with high frequency sweep rate modifications to compensate for absorption, and then the frequency sweep signal set is generated based on the combination of high and low frequency sweep rate modifications.
    Type: Application
    Filed: January 31, 2013
    Publication date: August 8, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • METHOD AND APPARATUS FOR PROCESSING SEISMIC DATA
    Publication number: 20130194893
    Abstract: Methods and apparatuses for processing seismic data carrying information about a subsurface structure are provided. One method includes splitting the seismic data in groups, each group including subsets of seismic data for which a distance from a respective shot point to a receiver line in a patch of active detectors corresponding to the shot point is within a predetermined range for the group, and extracting signal data for each block Hankel matrix based on an SVD analysis thereof. Another method includes extracting signal data by subtracting from seismic data an estimated noise model obtained by rank reduction of a Hankel matrix followed by dip filtering, enhanced based on a least square matching filter with the seismic data.
    Type: Application
    Filed: December 3, 2012
    Publication date: August 1, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • ACTIVELY CONTROLLED BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD
    Publication number: 20130188450
    Abstract: A buoy for recording seismic signals while underwater. The buoy includes a body; a buoyancy system configured to control a buoyancy of the body to descend to a predetermined depth (H1); a propulsion system configured to actively adjust a position of the body at a given position (X, Y); a seismic sensor located on the body and configured to record the seismic signals; and a control device configured to control the buoyancy system to maintain the body substantially at the predetermined depth (H1) and to control the propulsion system to maintain the body substantially at the given position (X, Y) while the buoy records seismic data, and also to instruct the seismic sensor when to record seismic signals.
    Type: Application
    Filed: January 8, 2013
    Publication date: July 25, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS Services SA
  • BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD
    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
  • BUOY BASED MARINE SEISMIC SURVEY SYSTEM AND METHOD
    Publication number: 20130188449
    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: Application
    Filed: January 8, 2013
    Publication date: July 25, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • MULTI-VESSEL SEISMIC ACQUISITION WITH UNDULATING NAVIGATION LINES
    Publication number: 20130188448
    Abstract: Method for determining a seismic survey configuration of a multi-vessel acquisition system. The method includes a step of receiving number that corresponds to vessels to be used in the multi-vessel acquisition system; a step of receiving a cross-line distance between first and last straight line paths corresponding to first and last vessels, respectively, of the multi-vessel acquisition system; a step of receiving an inline distance between the first and last vessels; a step of selecting shapes of undulating paths for the vessels of the multi-vessel acquisition system; a step of receiving a desired azimuth and/or offset distribution of receivers towed by one or more streamer vessels of the multi-vessel acquisition system relative to source vessels of the multi-vessel acquisition system; and a step of calculating amplitudes (Ai), periods (Ti) and phases of the undulating paths.
    Type: Application
    Filed: January 23, 2013
    Publication date: July 25, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • SEISMIC DATA PROCESSING INCLUDING INTERNAL MULTIPLE MODELING WITHOUT SUBSURFACE INFORMATION
    Publication number: 20130182535
    Abstract: A system and method are disclosed for substantially eliminating the influence of internal multiples when seismic mapping under-water geographical areas of interest without a priori knowledge of subsurface information. The system and method iteratively locate multiple-generating horizons for predicting internal multiples and uses a lower-higher-lower relationship between the multiple generating horizons. The system and method provide an appropriate and cost-effective means for internal multiple attenuation without subsurface information.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • DEVICE AND METHOD FOR REMOVAL OF MULTIPLES FROM SEISMIC DATA VINTAGES
    Publication number: 20130182534
    Abstract: A method, an apparatus and a computer readable medium for generating an image of a subsurface based on seismic data corresponding to at least two different times, for a same surveyed area are provided. A cost function, which is a sum over the seismic data vintages of a norm of differences between data and model predicted multiples, is minimized subject to minimizing residual multiples that are differences of corresponding multiples belonging to different vintages among the seismic data vintages.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • DEVICE AND METHOD FOR ESTIMATING TIME-SHIFTS
    Publication number: 20130182537
    Abstract: Computing device and method for calculating time-shifts associated with travel-times of seismic waves emitted by a source and recorded by plural seismic detectors after reflection from a subsurface structure. The method includes receiving seismic data (d) that includes plural traces related to a subsurface, wherein the seismic data (d) is in a time-space domain; transforming with a processor the seismic data (d) from the time-space domain to a radon domain; picking linear events from the seismic data in the radon domain; calculating the time-shifts associated with the picked linear events; correcting the seismic data (d) based on the time-shifts to obtain new seismic data (d?); and computing an image of the subsurface based on the new seismic data (d?). The time-shifts are calculated per trace and per event.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: CGGVERITAS SERVICES SA
  • VARIABLE DEPTH STREAMER SRME
    Publication number: 20130176818
    Abstract: Methods and systems for variable wavelet correction are described. A variable depth dataset is deghosted before presentation to a multiples prediction step of multiples elimination model. In another aspect, the multiples prediction is reghosted before presentation to and adaptive subtraction step of the multiples elimination model. A source-side zero-phasing signature can be applied before deghosting and a predefined gain can be applied in the low and high frequency sides as part of deghosting and reghosting to compensate for the squaring effect produced by convolving wavelets.
    Type: Application
    Filed: August 31, 2012
    Publication date: July 11, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventor: Ronan SABLON
  • SURFACE-CONSISTENT AMPLITUDE AND DECONVOLUTION SIMULTANEOUS JOINED INVERSION
    Publication number: 20130176820
    Abstract: Methods and systems for a surface-consistent amplitude and deconvolution simultaneous joined inversion are described. A one-pass estimation using input trace data for generating gain and deconvolution operator based on a least squares iteration method. A series of iterations are performed simultaneously and independently estimating amplitude scalars and autocorrelation spectra with a common convergence criterion. The gain and deconvolution operator can further be used to correct the input trace data for pre-stack or stack imaging.
    Type: Application
    Filed: July 20, 2012
    Publication date: July 11, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventors: David LE MEUR, Katia Garceran