公开(公告)号：US20230288590A1

公开(公告)日：2023-09-14

申请号：US18145115

申请日：2022-12-22

Applicant: CGG SERVICES SAS

Inventor： Zedong WU ,  Zhiyuan WEI ,  Zhigang ZHANG ,  Jiawei MEI ,  Rongxin HUANG ,  Ping WANG

IPC: G01V1/28 ,  G01V1/30

CPC classification number: G01V1/282 ,  G01V1/303 ,  G01V2210/614

Abstract: A method for seismic imaging of a subsurface using a full waveform inversion, FWI, includes the steps of obtaining an initial P-velocity model that describes how a seismic wave propagates through the subsurface, generating an S-velocity model based on the initial P-velocity model, generating an elastic synthetic dataset p based on the initial P-velocity model and the S-velocity model, receiving a recorded seismic dataset d of the subsurface, updating the P-velocity model based on a comparison between the synthetic dataset p and the recorded seismic dataset d, updating a reflectivity at various locations in the subsurface based on the updated P-velocity model, and generating an image of the subsurface based on the reflectivity.

公开(公告)号：US20240310544A1

公开(公告)日：2024-09-19

申请号：US18512089

申请日：2023-11-17

Applicant: CGG SERVICES SAS

Inventor： Kawin NIMSAILA ,  Gang LIU ,  Zedong WU ,  Zhigang ZHANG ,  Ping WANG

IPC: G01V1/34 ,  G01V1/28

CPC classification number: G01V1/345 ,  G01V1/282

Abstract: A method for imaging a formation of a subsurface includes receiving input data d related to the subsurface, generating synthetic data u related to the subsurface, by applying an implicit finite-difference approach to a reflectivity model r, updating a velocity model V based on the input data d and the synthetic data u, and generating an image of the formation in the subsurface based on the updated velocity model, wherein the formation is used to locate natural resources.