公开(公告)号：US20170146675A1

公开(公告)日：2017-05-25

申请号：US15322808

申请日：2014-07-08

Applicant: CGG SERVICES SAS

Inventor： Benoît DE CACQUERAY ,  Julien COTTON

IPC: G01V1/36 ,  G01V1/30 ,  G01V1/00

CPC classification number: G01V1/36 ,  G01V1/005 ,  G01V1/308 ,  G01V2210/169

Abstract: A system and method for reconstructing an incomplete data subset in seismic exploration is disclosed. The method includes receiving data based on a first emitted signal as a complete dataset. The first emitted signal is a range of frequencies between a starting frequency and a stopping frequency. The method further includes receiving data based on a second emitted signal as an incomplete data subset. The second emitted signal is a subset of the frequencies used by the first emitted signal between the starting frequency and the stopping frequency. The method further includes creating a reconstructed dataset by supplementing the incomplete data subset with the complete dataset and generating a seismic image based on the reconstructed dataset.

公开(公告)号：US20170242141A1

公开(公告)日：2017-08-24

申请号：US15503773

申请日：2015-09-08

Applicant: CGG SERVICES SAS

Inventor： Julien COTTON ,  Eric FORGUES

IPC: G01V1/30 ,  G01V1/28 ,  G01V1/36

CPC classification number: G01V1/30 ,  G01V1/282 ,  G01V1/36 ,  G01V2210/51

Abstract: Systems and methods for performing seismic migration using an indexed matrix are disclosed. The method includes receiving a seismic trace from a receiver, determining a discretized position of the receiver, and determining a discretized position of a seismic source. The method also includes determining a set of migration indexes based on a matrix, the discretized position of the receiver, and the discretized position of the seismic source, and determining a set of amplitude weights based on the matrix, the discretized position of the receiver, and the discretized position of the seismic source. The method further includes migrating the seismic trace based on the set of migration indexes and the set of amplitude weights.

公开(公告)号：US20190317232A1

公开(公告)日：2019-10-17

申请号：US15954976

申请日：2018-04-17

Applicant: CGG SERVICES SAS

Inventor： Brice TAYART DE BORMS ,  Julien COTTON ,  Paul HARDOUIN

IPC: G01V1/00 ,  G01V1/09

Abstract: A method for actuating plural sets of vibratory seismic sources. The method includes calculating, at a controller, a continuous signal Cn that is made as a periodic repetition of a template pn, wherein the template pn includes a swept-frequency signal; receiving a subset duration time Lsub; receiving a tapering function W having a time length of Lsub; receiving a calendar time tsweep; computing, at the controller, a product Sn of a subset of the continuous signal Cn and the tapering function W, wherein the subset of the continuous signal Cn starts at the calendar time tsweep and lasts for the duration time Lsub; and actuating a set n of the plural sets of vibratory sources at the calendar time tsweep, wherein each vibratory source of the set n of vibratory sources is actuated based on the product Sn.

公开(公告)号：US20180292556A1

公开(公告)日：2018-10-11

申请号：US15518260

申请日：2015-10-22

Applicant: CGG SERVICES SAS

Inventor： Julien COTTON ,  Cecile BERRON ,  Benoit DE CACQUERAY ,  Florian DURET ,  Eric FORGUES

IPC: G01V1/36

Abstract: Systems and methods for deghosting seismic data using migration of sparse arrays are disclosed. The methods may include obtaining input seismic data, the input seismic data including a first set of seismic data recorded by a first set of seismic receivers located at a first depth, and a second set of seismic data recorded by a second set of seismic receivers located at a second depth. The method may further include migrating the first set of seismic data to an image grid, and migrating the second set of seismic data to the image grid. Additionally, the method may further include calculating a ghost wave based on the first and second sets of migrated seismic data, and deghosting the first set of migrated seismic data by removing the ghost wave.

公开(公告)号：US20170371052A1

公开(公告)日：2017-12-28

申请号：US15528259

申请日：2015-12-11

Applicant: CGG SERVICES SAS

Inventor： Julien COTTON ,  Herve CHAURIS ,  Eric FORGUES

IPC: G01V1/30 ,  G01V99/00

CPC classification number: G01V1/308 ,  G01V99/005 ,  G01V2210/612

Abstract: A modified velocity model different from an initial velocity model is determined for migrating a vintage of 4D seismic data. The modified velocity model minimizes differences between a reference vintage migrated using the initial velocity model and the vintage migrated using the modified velocity model.