公开(公告)号：US10520616B2

公开(公告)日：2019-12-31

申请号：US15388081

申请日：2016-12-22

Applicant: CGG SERVICES SAS

Inventor： Laurent Ruet ,  Robert Dowle ,  Benoit Teyssandier

IPC: G01V1/06 ,  G01V1/135 ,  G01V1/00 ,  G01V1/38 ,  G01V1/143 ,  G01V13/00 ,  G01V1/133 ,  G10K11/18

Abstract: A method for generating acoustic waves under water includes actuating first and second pistons with an actuator system provided inside an enclosure of a source element, to generate a wave having a first frequency, and actuating the first and second pistons with a pressure mechanism attached to the enclosure, to control a pressure of a fluid inside the enclosure such that a pressure of the fluid is substantially equal to an ambient pressure of the enclosure. The enclosure has first and second openings and the first and second pistons are configured to close the first and second openings.

公开(公告)号：US10520640B2

公开(公告)日：2019-12-31

申请号：US15589235

申请日：2017-05-08

Applicant: CGG SERVICES SAS

Inventor： Benoit Teyssandier ,  John James Sallas

IPC: G01V1/38 ,  G01V13/00

Abstract: Computing device, software and method for calibrating pilot and drive signals of a marine seismic source array using measured data. The method includes receiving a source array geometry and a model of the source array; estimating an initial overall response of the source array based on numerical simulations, the model of the source array, and the source array geometry; generating the pilot and drive signals for the source array based on the initial overall response; determining individual responses of the source elements, which form the source array, based on the source array geometry, the model of the source array, and first measured data; calculating an actual overall response of the source array based on the pilot and drive signals, the model of the source array and second measured data; and adjusting the pilot and drive signals based on the actual overall response of the source array.