公开(公告)号：US10324207B2

公开(公告)日：2019-06-18

申请号：US15337561

申请日：2016-10-28

Applicant: CGG SERVICES SA

Inventor： Adel Khalil ,  Henning Hoeber ,  Jeshurun Hembd ,  Adriano Gomes ,  Gordon Poole ,  Francesco Perrone ,  Lorenzo Casasanta ,  Graham Roberts ,  Andrew Ratcliffe

IPC: G01V1/34 ,  G01V1/28 ,  G01V1/36 ,  G01V1/32 ,  G01V1/30

Abstract: Computing device, computer instructions and method for calculating an image of a subsurface based on least square migration and image de-convolution using a matching operator F. The method includes receiving seismic data d; computing a first image m of the subsurface based on the seismic data d; computing a second image h of the subsurface based on the first image m; applying a transform operation to the first and second images m and h to obtain a first transform of the first image and a second transform of the second image; calculating the matching operator F by matching the first transform of the first image to the second transform of the second image; and generating an updated image mupdated of the subsurface based on the matching operator F and the first transform of the first image.

公开(公告)号：US10670752B2

公开(公告)日：2020-06-02

申请号：US15303617

申请日：2015-04-13

Applicant: CGG SERVICES SA

Inventor： Andrew Ratcliffe ,  Graham Conroy

IPC: G01V1/28 ,  G01V1/30 ,  G01V99/00

Abstract: Recorded seismic data are obtained at a plurality of receivers from a plurality of sources, and a set of sources from the plurality of sources is selected using spatial criteria based on a location of each source such that any two sources in the set of sources are separated by a predefined minimum distance of separation sufficient to reduce cross talk between sources. The set of sources is combined in a non-encoded manner into a composite source, and forward modeling for the composite source is performed to generate a synthetic seismic data set. A composite recorded seismic data set for the set of sources is determined, and the synthetic seismic data set and composite recorded seismic data set are used to determine a residual seismic data set. Backward modeling generates a gradient update used to generate an updated earth model.

公开(公告)号：US10339234B2

公开(公告)日：2019-07-02

申请号：US14947111

申请日：2015-11-20

Applicant: CGG SERVICES SA

Inventor： Andrew Ratcliffe ,  Graham Roberts ,  Lian Duan

IPC: G06F17/50 ,  G01V1/28 ,  G01V1/30

Abstract: An Earth model of a subsurface is created from acquired seismic data by migrating at least one of the incident wavefields and reflected wavefields to generate angle gathers for the seismic data and identifying for the subsurface an elastic Earth model equation for the incident wavefields and the reflected wavefields in the acquired seismic data. The elastic Earth model is a function of reflection angle between the incident wavefields and reflected wavefields and elastic parameters and is fit to the generated angle gathers through perturbation in the elastic parameters. The generated perturbations are used to create the Earth model of the subsurface.