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Gaussian beam prestack depth migration of converted wave in TI media
Jianguang Han;  Yun Wang;  Zhantao Xing;  Jun Lu
2014
发表期刊Journal of Applied Geophysics
卷号109页码:7-14
摘要

Increasing amounts of multi-component seismic data are being acquired on land and offshore because more complete seismic wavefield information is beneficial for structural imaging, fluid detection, and reservoir monitoring. S-waves are typically influenced more by anisotropy in a medium than are P-waves; as a result, the anisotropy cannot be ignored during the converted PS-wave imaging. Gaussian beam migration, an elegant and efficient depth migration method, is becoming a new topic in the study of PS-wave migration; its accuracy is comparable to that of wave-equation migration, and its flexibility is comparable to that of Kirchhoff migration. In this paper, we introduce an anisotropic Gaussian beam prestack depth migration (GB-PSDM) method for the converted PS-wave, in which the anisotropic media can be a transversely isotropic (TI) medium with a vertical or tilted symmetry axis. We present the PS-wave common shot gathers GB-PSDM imaging condition and derive the ray tracing of P- and SV-waves in two-dimensional TI media. The migration impulse responses of P- and SV-propagation modes in TI media with both vertical and tilted symmetry axes are presented. The results of numerical examples indicate that the method introduced here offers significant improvements in the quality of converted PS-wave imaging compared with an isotropic algorithm.

关键词Transversely Isotropy Media converted Wave ray Tracing gaussian Beam Prestack Depth Migration
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9392
专题矿床地球化学国家重点实验室
作者单位1.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
4.China University of Geosciences (Beijing), Beijing 100083, China
推荐引用方式
GB/T 7714
Jianguang Han;Yun Wang;Zhantao Xing;Jun Lu. Gaussian beam prestack depth migration of converted wave in TI media[J]. Journal of Applied Geophysics,2014,109:7-14.
APA Jianguang Han;Yun Wang;Zhantao Xing;Jun Lu.(2014).Gaussian beam prestack depth migration of converted wave in TI media.Journal of Applied Geophysics,109,7-14.
MLA Jianguang Han;Yun Wang;Zhantao Xing;Jun Lu."Gaussian beam prestack depth migration of converted wave in TI media".Journal of Applied Geophysics 109(2014):7-14.
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