公开(公告)号：US10598806B2

公开(公告)日：2020-03-24

申请号：US16419342

申请日：2019-05-22

Applicant: CGG SERVICES SAS

Inventor： Chris Davison ,  Gordon Poole ,  Ziqin Yu ,  Yuan Ni

IPC: G01V1/36 ,  G01V1/38

Abstract: A method for estimating a time variant signal representing a seismic source obtains seismic data recorded by at least one receiver and generated by the seismic source, the recorded seismic data comprising direct arrivals and derives the time variant signal using an operator that relates the time variant signal to the acquired seismic data, the operator constrained such that the time variant signal is sparse in time.

公开(公告)号：US10310125B2

公开(公告)日：2019-06-04

申请号：US15440438

申请日：2017-02-23

Applicant: CGG SERVICES SAS

Inventor： Risto Siliqi ,  Gordon Poole

IPC: G01V1/38

Abstract: Seismic survey system and method for adjusting positions of plural autonomous receiver nodes (ARNs) of a seismic survey system. The method includes calculating first travel-times of direct arrivals of seismic waves, based on (i) offsets between shooting positions of seismic sources and recording positions of the plural ARNs, and (ii) a speed of the seismic waves in water; estimating second travel-times of the direct arrivals, based on seismic data recorded by the plural ARNs; estimating, in a computing device, positioning errors of one or more of the plural ARNs by applying an inversion algorithm to a misfit between the first and second travel-times; and adjusting the recording positions of the one or more ARNs with the positioning errors.

公开(公告)号：US10191168B2

公开(公告)日：2019-01-29

申请号：US15402830

申请日：2017-01-10

Applicant: CGG SERVICES SAS

Inventor： Can Peng ,  Arash Jafargandomi ,  Henning Hoeber ,  James Cooper ,  Gordon Poole

IPC: G01V1/36 ,  G01V1/30 ,  G01V1/28 ,  G01V1/37

Abstract: Generating spectrally enhanced seismic data expresses seismic data as a convolution of reflectivity and a seismic source wavelet. This seismic source wavelet varies over a sampling interval and defining a total amount of energy over the sampling interval. An enhanced seismic source wavelet that is a single-valued energy spike that yields the total amount of energy over the sampling interval is generated. In addition, the reflectivity is modified to preserve amplitude variation with angle. The reflectivity is convoluted with the enhanced seismic source wavelet and residual energy is added to the convolution to generate the spectrally enhanced seismic data.