公开(公告)号：US20220308245A1

公开(公告)日：2022-09-29

申请号：US17453994

申请日：2021-11-08

Applicant: CGG SERVICES SAS

Inventor： Hui HUANG ,  Diancheng WANG ,  Ping WANG

IPC: G01V1/28 ,  G01V1/34 ,  G01V1/30

Abstract: Limitations in accuracy and computing power requirements impeding conventional Kirchhoff migration and reverse time migration are overcome by using the wave-equation Kirchhoff, WEK, technique with Kirchhoff migration. WEK technique includes forward-propagating a low-frequency wavefield from a shot location among pre-defined source locations, calculating an arrival traveltime of a maximum amplitude of the low-frequency wavefield, and applying Kirchhoff migration using the arrival traveltime and the maximum amplitude.