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Computing dip-angle gathers using Poynting vector for elastic reverse time migration in 2D transversely isotropic media

文献类型：期刊论文

作者Lu, Yongming1; Wang, Xiaoyi2; Lei, Tao1
刊名COMPUTERS & GEOSCIENCES
出版日期2022-10-01
卷号167页码:12
ISSN号0098-3004
关键词Elastic reverse time migration Anisotropy Dip-angle gathers Optical flow
DOI10.1016/j.cageo.2022.105139
英文摘要Angle-domain common-image gathers (ADCIGs) have wide applications in seismic imaging. For isotropic elastic reverse time migration (ERTM), we can produce dip-angle ADCIGs by using conventional Poynting vectors. Seismic anisotropy widely occurrs in Earth materials, such as in the shales and fractured reservoirs. ERTM based on the isotropic elastic wave equation is unable to accurately image anisotropic structures, leading to noise, discontinuous reflection events and mispositioning in migration results. Hence, conducting ERTM and generating dip-angle ADCIGs for anisotropic media require solving the anisotropic elastic wave equation. However, it is challenging to compute the gathers using the conventional Poynting vector for anisotropic elastic media. In this study, we derive the group and phase Poynting vectors, in which we use the optical flow method to stabilize the phase-related Poynting vectors. This approach admits efficient calculation of dip-angle ADCIG in anisotropic media. It also suppresses noise in anisotropic ERTM. The results of numerical experiments demonstrate the effectiveness of the proposed method.
WOS关键词WAVE-MODE SEPARATION ; FIELD DECOMPOSITION ; P-WAVE ; IMAGE ; EQUATION ; SCALAR ; ANISOTROPY
资助项目National Natural Science Fund of China[42104119] ; National Natural Science Fund of China[41904051] ; China Postdoctoral Science Foundation[2019M652196]
WOS研究方向Computer Science ; Geology
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000858804400001
资助机构National Natural Science Fund of China ; National Natural Science Fund of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Fund of China ; National Natural Science Fund of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Fund of China ; National Natural Science Fund of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Fund of China ; National Natural Science Fund of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/108320]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Lu, Yongming
作者单位1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Lu, Yongming,Wang, Xiaoyi,Lei, Tao. Computing dip-angle gathers using Poynting vector for elastic reverse time migration in 2D transversely isotropic media[J]. COMPUTERS & GEOSCIENCES,2022,167:12.
APA Lu, Yongming,Wang, Xiaoyi,&Lei, Tao.(2022).Computing dip-angle gathers using Poynting vector for elastic reverse time migration in 2D transversely isotropic media.COMPUTERS & GEOSCIENCES,167,12.
MLA Lu, Yongming,et al."Computing dip-angle gathers using Poynting vector for elastic reverse time migration in 2D transversely isotropic media".COMPUTERS & GEOSCIENCES 167(2022):12.

入库方式： OAI收割

来源：地质与地球物理研究所

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