公开(公告)号：US11880009B2

公开(公告)日：2024-01-23

申请号：US17380103

申请日：2021-07-20

Applicant: CGG SERVICES SAS

Inventor： Zhiguang Xue ,  Zhigang Zhang ,  Ping Wang

IPC: G01V1/30 ,  G01V1/36 ,  G01V1/28

CPC classification number: G01V1/308 ,  G01V1/282 ,  G01V1/36 ,  G01V2210/42 ,  G01V2210/51

Abstract: Methods and devices according to various embodiments perform full-wave inversion jointly for datasets acquired at different times over the same underground formation using a time-lag cost function with target regularization terms. This approach improves the 4D signal within reservoirs and suppresses 4D noise outside.

公开(公告)号：US11048001B2

公开(公告)日：2021-06-29

申请号：US16049941

申请日：2018-07-31

Applicant: CGG SERVICES SAS

Inventor： Zhigang Zhang ,  Ping Wang ,  Adriano Gomes ,  Jiawei Mei ,  Feng Lin ,  Rongxin Huang

IPC: G01V1/30 ,  G01V1/28

Abstract: Methods and devices use improved FWI techniques for seismic exploration of subsurface formations including salt bodies using a travel-time cost function. In calculating the travel-time cost function, time-shifts may be weighted using cross-correlation coefficients of respective time-shifted recorded data and synthetic data generated based on current velocity model. The improved methods enhance the resulting image while avoiding cycle-skipping and issues related to amplitude difference between synthetic and recorded data.

公开(公告)号：US11635540B2

公开(公告)日：2023-04-25

申请号：US16662644

申请日：2019-10-24

Applicant: CGG SERVICES SAS

Inventor： Diancheng Wang ,  Ping Wang

IPC: G06F30/20 ,  G01V1/32 ,  G01V1/30 ,  G01V99/00 ,  G06F111/10

Abstract: Methods and devices for seismic exploration of an underground structure apply W2-based full-wave inversion to transformed synthetic and seismic data. Data transformation ensures that the synthetic and seismic data are positive definite and have the same mass using an adaptive normalization. This approach yields superior results particularly when the underground structure includes salt bodies.

公开(公告)号：US11940579B2

公开(公告)日：2024-03-26

申请号：US17453994

申请日：2021-11-08

Applicant: CGG SERVICES SAS

Inventor： Hui Huang ,  Diancheng Wang ,  Ping Wang

IPC: G01V1/28 ,  G01V1/30 ,  G01V1/34

CPC classification number: G01V1/282 ,  G01V1/301 ,  G01V1/305 ,  G01V1/307 ,  G01V1/345

Abstract: Limitations in accuracy and computing power requirements impeding conventional Kirchhoff migration and reverse time migration are overcome by using the wave-equation Kirchhoff, WEK, technique with Kirchhoff migration. WEK technique includes forward-propagating a low-frequency wavefield from a shot location among pre-defined source locations, calculating an arrival traveltime of a maximum amplitude of the low-frequency wavefield, and applying Kirchhoff migration using the arrival traveltime and the maximum amplitude.