公开(公告)号：US20240295666A1

公开(公告)日：2024-09-05

申请号：US18630066

申请日：2024-04-09

Applicant: CGG SERVICES SAS

Inventor： Filipe RUDRIGUES ,  Danilo ALBUQUERQUE ,  Gabriel BRANDO ,  Danilo FROES ,  Benjamin HUARD ,  Luis CYPRIANO ,  Roberto PEREIRA ,  Adel KHALIL

IPC: G01V1/30 ,  G01V1/36

CPC classification number: G01V1/308 ,  G01V1/303 ,  G01V1/306 ,  G01V1/364 ,  G01V2210/612 ,  G01V2210/614

Abstract: A joint timelapse full waveform inversion (FWI) method for estimating physical properties of a subsurface includes receiving seismic data related to the subsurface, wherein the seismic data includes a baseline dataset dB and a monitor dataset dM, defining an objective function of the FWI method, calculating a baseline gradient gB of the objective function for the baseline dataset dB, and a monitor gradient gM of the objective function for the monitor dataset dM, computing a baseline preconditioner P′B for the baseline dataset dB and a monitor preconditioner P′M for the monitor dataset dM so that each of the baseline preconditioner P′B and the monitor preconditioner P′M reflects similarities and/or differences of geometrical features of the baseline and monitor acquisition surveys, and determining physical properties of the subsurface based on a baseline physical properties update and a monitor physical properties update.