GYIG OpenIR  > 矿床地球化学国家重点实验室
Wavefield interpolation in 3D large-step Fourier wavefield extrapolation
Gaoxiang Chen;  Li-Yun Fu;  Wei Wei;  Weijia Sun
Source PublicationGeophysical Prospecting

Extrapolating wavefields and imaging at each depth during three-dimensional recursive wave-equation migration is a time-consuming endeavor. For efficiency, most commercial techniques extrapolate wavefields through thick slabs followed by wavefield interpolation within each thick slab. In this article, we develop this strategy by associating more efficient interpolators with a Fourier-transform-related wavefield extrapolation method. First, we formulate a three-dimensional first-order separation-of-variables screen propagator for large-step wavefield extrapolation, which allows for wide-angle propagations in highly contrasting media. This propagator significantly improves the performance of the split-step Fourier method in dealing with significant lateral heterogeneities at the cost of only one more fast Fourier transform in each thick slab. We then extend the two-dimensional Kirchhoff and Born-Kirchhoff local wavefield interpolators to three-dimensional cases for each slab. The three-dimensional Kirchhoff interpolator is based on the traditional Kirchhoff formula and applies to moderate lateral velocity variations, whereas the three-dimensional Born-Kirchhoff interpolator is derived from the Lippmann-Schwinger integral equation under the Born approximation and is adapted to highly laterally varying media. Numerical examples on the three-dimensional salt model of the Society of Exploration Geophysicists/European Association of Geoscientists demonstrate that three-dimensional first-order separation-of-variables screen propagator Born-Kirchhoff depth migration using thick-slab wavefield extrapolation plus thin-slab interpolation tolerates a considerable depth-step size of up to 72 ms, eventually resulting in an efficiency improvement of nearly 80% without obvious loss of imaging accuracy. Although the proposed three-dimensional interpolators are presented with one-way Fourier extrapolation methods, they can be extended for applications to general migration methods.

Keyword3d Fourier Depth Migration first-order Separation-of-variables Screen Propagator thick-slab Extrapolation thin-slab Interpolation 3d Born–kirchhoff Interpolators
Indexed BySCI
Document Type期刊论文
Affiliation1.Key Laboratory of Petroleum Resource Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2.The State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
3.Zhejiang Provincial Institute of Communication, Planning, Design and Research, Zhejiang 310000, China
Recommended Citation
GB/T 7714
Gaoxiang Chen;Li-Yun Fu;Wei Wei;Weijia Sun. Wavefield interpolation in 3D large-step Fourier wavefield extrapolation[J]. Geophysical Prospecting,2018,66(2):311-326.
APA Gaoxiang Chen;Li-Yun Fu;Wei Wei;Weijia Sun.(2018).Wavefield interpolation in 3D large-step Fourier wavefield extrapolation.Geophysical Prospecting,66(2),311-326.
MLA Gaoxiang Chen;Li-Yun Fu;Wei Wei;Weijia Sun."Wavefield interpolation in 3D large-step Fourier wavefield extrapolation".Geophysical Prospecting 66.2(2018):311-326.
Files in This Item:
File Name/Size DocType Version Access License
Wavefield interpolat(5220KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gaoxiang Chen;Li-Yun Fu;Wei Wei;Weijia Sun]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gaoxiang Chen;Li-Yun Fu;Wei Wei;Weijia Sun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gaoxiang Chen;Li-Yun Fu;Wei Wei;Weijia Sun]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Wavefield interpolation in 3D large-step Fourier wavefield extrapolation.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.