An Iterative Zero-Offset VSP Wavefield Separating Method Based on the Error Analysis of SVD Filtering
An Iterative Zero-Offset VSP Wavefield Separating Method Based on the Error Analysis of SVD Filtering
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基于SVD滤波误差分析的迭代零偏移VSP波场分离方法
DOI:
10.1109/lgrs.2018.2830375
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发表时间:
2018-05
影响因子:
4.8
通讯作者:
Chen WC
中科院分区:
文献类型:
--
作者:
Wang Xiaokai;Chen Jianyou;Gao Lei;Chen Wenchao;Chen WC
Wavefield separation is one critical step in the vertical seismic profiling (VSP) data processing. In this letter, we present an iterative zero-offset VSP wavefield separating method based on analyzing the error of the singular value decomposition (SVD) low-pass filtering. The error of the SVD low-pass filtering can be divided into the incomplete error and the truncated error. The incomplete error is caused by the incompleteness of subspace, while the truncated error is related to discarding small singular values and corresponding eigenimages. Flattening the strongly correlated component in the 2-D signal can reduce these two errors, and the flattened component can be extracted precisely with the SVD low-pass filtering. The zero-offset VSP data set in seismic data processing records downgoing and upgoing wavefields, which have different propagating directions. By flattening the downgoing and upgoing wavefields alternatively, we propose one iterative zero-offset VSP wavefield separating method. In each iteration, we first flatten the downgoing wavefield to increase its correlation and estimate the downgoing wavefield by using the SVD low-pass filtering, and then, we flatten the upgoing wavefield in the residual to increase its correlation and estimate the upgoing wavefield by using the SVD low-pass filtering. The proposed method is applied to one synthetic data set and one real zero-offset VSP data set. Compared with the commonly used wavefield separation method, our method can have better separation results and reduce the separation error.
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影响因子:
3.3
作者:
S. Treitel;J. Shanks;C. Frasier
通讯作者:
S. Treitel;J. Shanks;C. Frasier
DOI:
10.1016/j.amc.2004.04.016
发表时间:
2005-04
期刊:
Appl. Math. Comput.
影响因子:
--
作者:
Daoqiang Zhang;Songcan Chen;Zhi-Hua Zhou
通讯作者:
Daoqiang Zhang;Songcan Chen;Zhi-Hua Zhou
影响因子:
2.9
作者:
M. Zibulevsky;Barak A. Pearlmutter
通讯作者:
M. Zibulevsky;Barak A. Pearlmutter
DOI:
--
发表时间:
2002
期刊:
--
影响因子:
--
作者:
K. Aki;P. Richards
通讯作者:
K. Aki;P. Richards
DOI:
10.1109/tgrs.2016.2572736
发表时间:
2016-10-01
影响因子:
8.2
作者:
Zou, Zhengxia;Shi, Zhenwei
通讯作者:
Shi, Zhenwei