公开(公告)号：US20210063590A1

公开(公告)日：2021-03-04

申请号：US16913385

申请日：2020-06-26

Applicant: CGG SERVICES SAS

Inventor： James COOPER ,  Andrew RATCLIFFE ,  Gordon POOLE

IPC: G01V1/28 ,  G01V1/34 ,  G01V1/30

Abstract: Methods and apparatuses for seismic exploration of an underground structure obtain improved images by integrating partial match filtering in an FWI. Filtered (auxiliary) data replaces one of the observed data and the synthetic data in the FWI's objective function to avoid cycle skipping.

公开(公告)号：US20170199289A1

公开(公告)日：2017-07-13

申请号：US15402830

申请日：2017-01-10

Applicant: CGG SERVICES SAS

Inventor： Can PENG ,  Arash JAFARGANDOMI ,  Henning HOEBER ,  James COOPER ,  Gordon POOLE

IPC: G01V1/36 ,  G01V1/30 ,  G01V1/28

CPC classification number: G01V1/362 ,  G01V1/282 ,  G01V1/307 ,  G01V1/375 ,  G01V2210/512 ,  G01V2210/632

Abstract: Generating spectrally enhanced seismic data expresses seismic data as a convolution of reflectivity and a seismic source wavelet. This seismic source wavelet varies over a sampling interval and defining a total amount of energy over the sampling interval. An enhanced seismic source wavelet that is a single-valued energy spike that yields the total amount of energy over the sampling interval is generated. In addition, the reflectivity is modified to preserve amplitude variation with angle. The reflectivity is convoluted with the enhanced seismic source wavelet and residual energy is added to the convolution to generate the spectrally enhanced seismic data.