公开(公告)号：US20190302293A1

公开(公告)日：2019-10-03

申请号：US16049941

申请日：2018-07-31

Applicant: CGG SERVICES SAS

Inventor： Zhigang ZHANG ,  Ping WANG ,  Adriano GOMES ,  Jiawei MEI ,  Feng LIN ,  Rongxin HUANG

IPC: G01V1/30 ,  G01V1/28

Abstract: Methods and devices use improved FWI techniques for seismic exploration of subsurface formations including salt bodies using a travel-time cost function. In calculating the travel-time cost function, time-shifts may be weighted using cross-correlation coefficients of respective time-shifted recorded data and synthetic data generated based on current velocity model. The improved methods enhance the resulting image while avoiding cycle-skipping and issues related to amplitude difference between synthetic and recorded data.