公开(公告)号：US20210003728A1

公开(公告)日：2021-01-07

申请号：US16870274

申请日：2020-05-08

Applicant: CGG SERVICES SAS

Inventor： Min WANG ,  Yi XIE ,  Tengfei WANG ,  Adriano GOMES

IPC: G01V1/28 ,  G01V1/30 ,  G01V1/00 ,  G01V1/36

Abstract: Methods and apparatuses for processing seismic data acquired with multicomponent sensors build an accurate S-wave velocity model of a surveyed underground formation using a full waveform inversion (FWI) approach. PS synthetic data is generated using approximative acoustic equations in anisotropic media with a P-wave model, a current S-wave velocity model and a reflectivity model as inputs. The current S-wave velocity model is updated using FWI to minimize an amplitude-discrepancy-mitigating cost function that alleviates the amplitude mismatch between the PS observed data and the PS synthetic data due to the use of the approximative acoustic equations.