公开(公告)号：US20240201407A1

公开(公告)日：2024-06-20

申请号：US18530452

申请日：2023-12-06

Applicant: CGG SERVICES SAS

Inventor： Filipe RUDRIGUES ,  Danilo ALBUQUERQUE ,  Gabriel PACHECO ,  Cleberton OLIVEIRA ,  Karine PEREIRA ,  Benjamin HUARD ,  Luis CYPRIANO ,  Roberto PEREIRA ,  Adel KHALIL

IPC: G01V1/32 ,  G01V1/28 ,  G01V1/30 ,  G01V1/34

CPC classification number: G01V1/325 ,  G01V1/282 ,  G01V1/302 ,  G01V1/345 ,  G01V2210/48 ,  G01V2210/51 ,  G01V2210/74

Abstract: A least-square migration, LSM, based method for generating a 4D image of a subsurface, the method including receiving seismic data d related to the subsurface, the seismic data d including a baseline dataset dB and a monitor dataset dM, calculating a baseline filter B and a monitor filter M based on a same common reflectivity r of the subsurface and corresponding remigrated baseline data mB1 and remigrated monitor data mM1 so that the base filter B applied to the remigrated baseline data mB1 equals the monitor filter M applied to the remigrated monitor data mM1, applying the baseline filter B to raw migrated baseline data mB0 and applying the monitor filter M to raw migrated monitor data mM0 to generate LSM baseline data mB and LSM monitor data mM, and generating the 4D image of the subsurface based on the LSM baseline data mB and the LSM monitor data mM.