Global Geology 2017, 20(2) 98-105 DOI:   10.3969/j.issn.1673-9736.2017.02.04  ISSN: 1673-9736 CN: 22-1371/P

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Keywords
high-resolution radon transform
multiple
wavefield extrapolation
stationary phase point
Authors
PubMed

Stationary phase point extraction based on high-resolution radon transform and its application to multiple attenuation by wavefield extrapolation

LI Aoqi, WANG Deli, LU Juntao, LIU Chengming, WANG Tong

College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China

Abstract

Multiple prediction and subtraction techniques based on wavefield extrapolation are effective for suppressing multiple related to water layers. In the conventional wavefield extrapolation method, the multiples of the seismic data are predicted from the known total wave field by the Green function convoluted with each point of the bottom. However, only the energy near the stationary phase point has an effect on the summation result when the convolutional gathers are added. The research proposed a stationary phase point extraction method based on high-resolution radon transform. In the radon domain, the energy near the stationary phase point is directly added along the convolutional gathers curve, which is a valid solution to the problem of the unstable phase of the events of multiple. The Curvelet matching subtraction technique is used to remove the multiple, which improved the accuracy of the multiple predicted by the wavefield extrapolation and the artifacts appearing around the events of multiple are well eliminated. The validity and feasibility of the proposed method are verified by the theoretical and practical data example.

Keywords high-resolution radon transform   multiple   wavefield extrapolation   stationary phase point  
Received 2016-10-08 Revised 2016-11-03 Online:  
DOI: 10.3969/j.issn.1673-9736.2017.02.04
Fund:

Supported by the National Science and Technology Major Project (No.2016ZX05026-002-003), and the National Natural Science Foundation of China (No. 41374108)

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