公开(公告)号：US20230350089A1

公开(公告)日：2023-11-02

申请号：US17734322

申请日：2022-05-02

Applicant: CGG SERVICES SAS

Inventor： Andrew RATCLIFFE ,  Cris HENSTOCK ,  Wenlei GAO ,  Nabil MASMOUDI

IPC: G01V1/30 ,  G01V1/28

CPC classification number: G01V1/30 ,  G01V1/282 ,  G01V2210/65

Abstract: Seismic data is processed using a full-waveform inversion using a model with a pseudo-δ layer. The presence of the pseudo-δ layer in the model enables handing the difference at the water bottom between acoustically generated synthetic data and seismic data that corresponds to an elastic medium. The pseudo-δ layer may be less than 100 m thick and/or may be located directly underneath the water bottom. The pseudo-δ layer may have a negative value for S and a null value for ϵ (δ and ϵ being Thomsen's anisotropy parameters).