多波高斯束叠前深度偏移速度分析

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Bibliographic Details
Published in应用地球物理：英文版 Vol. 11; no. 2; pp. 186 - 196
Main Author 韩建光 王赟 韩宁 邢占涛 芦俊
Format Journal Article
LanguageEnglish
Published 2014
Subjects
偏移速度分析
共成像点道集
多波
高斯束偏移
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Bibliography:Han Jian-Guang,Wang Yun,Han Ning,Xing Zhan-Tao,Lu Jun,Institute of Geology and Geophysics, Chinese Academy of Sciences,University of Chinese Academy of Sciences,Institute of Geochemistry, Chinese Academy of Sciences,College of Resources and Environment, Southwest University,China University of Geosciences （Beijing）
Gaussian beam migration;multiwave;migration velocity analysis;common-image gathers
11-5212/O
Prestack depth migration of multicomponent seismic data improves the imaging accuracy of subsurface complex geological structures. An accurate velocity field is critical to accurate imaging. Gaussian beam migration was used to perform multicomponent migration velocity analysis of PP- and PS-waves. First, PP- and PS-wave Gaussian beam prestack depth migration algorithms that operate on common-offset gathers are presented to extract offsetdomain common-image gathers of PP- and PS-waves. Second, based on the residual moveout equation, the migration velocity fields of P- and S-waves are updated. Depth matching is used to ensure that the depth of the target layers in the PP- and PS-wave migration profiles are consistent, and high-precision P- and S-wave velocities are obtained. Finally, synthetic and field seismic data suggest that the method can be used effectively in multiwave migration velocity analysis.
ISSN:1672-7975
1993-0658