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.

公开(公告)号：US20200309980A1

公开(公告)日：2020-10-01

申请号：US16662644

申请日：2019-10-24

Applicant: CGG SERVICES SAS

Inventor： Diancheng WANG ,  Ping WANG

IPC: G01V1/32 ,  G01V1/30 ,  G01V99/00 ,  G06F17/50

Abstract: Methods and devices for seismic exploration of an underground structure apply W2-based full-wave inversion to transformed synthetic and seismic data. Data transformation ensures that the synthetic and seismic data are positive definite and have the same mass using an adaptive normalization. This approach yields superior results particularly when the underground structure includes salt bodies.