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Dip angle-compensated one-way wave equation migration

文献类型：期刊论文

作者Sun, Weijia1,2; Zhou, Binzhong1; Fu, Li-Yun2
刊名EXPLORATION GEOPHYSICS
出版日期2010-06-01
卷号41期号:2页码:137-145
关键词Dip Angle Correction One-way Wave Equation Post-stack Migration
ISSN号0812-3985
DOI10.1071/EG09027
文献子类Article
英文摘要Conventional migration algorithms based on one-way wave equations in a Cartesian coordinate system often under estimate amplitudes, especially at large propagation or reflection angles. This has a deleterious effect on seismic images and should be corrected. We illustrate the nature of the problem by working in the more natural spherical coordinate system and offer two simple solutions to the problem: (1) a wave combination scheme where the wave extrapolation is done independently for each Cartesian coordinate and the resulting wavefields are summed and (2) a simple wave projection scheme whereby the conventional one-way propagator is corrected by means of a factor 1/cos(theta), where theta is the angle of the wave measured from the vertical axis or the reflector angle. The wave combination scheme is applicable to waves with propagation angles beyond 90 degrees, but will roughly triple the computation time compared with conventional one-way propagators in the 3D case. The wave projection scheme is more economical and can easily be implemented in the wavenumber (or slowness) domain at no extra computational cost. These schemes are valid both in depth-dependent media and in laterally heterogeneous media. In addition, the proposed amplitude-preserving schemes can be applied to all methods based on the conventional one-way wave equation. We then develop and implement the second approach to demonstrate its validity by means of numerical examples.
WOS关键词TRUE-AMPLITUDE ; FOURIER MIGRATION ; DOMAIN
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000278388500001
出版者CSIRO PUBLISHING
资助机构Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Australian Coal Association Research Program (ACARP) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS)
源URL[http://ir.iggcas.ac.cn/handle/132A11/72592]  
专题中国科学院地质与地球物理研究所
通讯作者Sun, Weijia
作者单位1.CSIRO Earth Sci & Resource Engn, Kenmore, Qld 4096, Australia
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Weijia,Zhou, Binzhong,Fu, Li-Yun. Dip angle-compensated one-way wave equation migration[J]. EXPLORATION GEOPHYSICS,2010,41(2):137-145.
APA Sun, Weijia,Zhou, Binzhong,&Fu, Li-Yun.(2010).Dip angle-compensated one-way wave equation migration.EXPLORATION GEOPHYSICS,41(2),137-145.
MLA Sun, Weijia,et al."Dip angle-compensated one-way wave equation migration".EXPLORATION GEOPHYSICS 41.2(2010):137-145.

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来源：地质与地球物理研究所

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