公开(公告)号：US20220326404A1

公开(公告)日：2022-10-13

申请号：US17705997

申请日：2022-03-28

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE ,  Ross HAACKE

IPC: G01V1/32

Abstract: Methods and seismic data processing apparatuses use a down-going annihilation operator to generate an image from seismic data acquired over a water-covered subsurface formation. The down-going annihilation operator is derived using a down-going wavefield and an estimated water-wave extracted from the seismic data. The down-going annihilation operator may be derived in plane-wave domain.

公开(公告)号：US20240069233A1

公开(公告)日：2024-02-29

申请号：US18504336

申请日：2023-11-08

Applicant: CGG SERVICES SAS

Inventor： Gordon POOLE ,  Ross HAACKE

IPC: G01V1/32

CPC classification number: G01V1/325 ,  G01V2210/144 ,  G01V2210/56

Abstract: A method for processing seismic data, the method including receiving seismic data acquired by at least one receiver over a water-covered subsurface formation; generating, based on the seismic data, a down-going wavefield; generating, based on the seismic data, a partial down-going wavefield with attenuated water-wave; estimating a subsurface reflectivity R using multi-dimensional deconvolution, which equates (1) a convolution of the down-going wavefield with the subsurface reflectivity R to (2) the partial down-going wavefield; and generating an image of the water-covered subsurface formation based on the subsurface reflectivity R.