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Fast wave-mode separation in anisotropic elastic reverse time migration using the phase velocity-related Poynting vector

文献类型：期刊论文

作者Wang, Xiaoyi2,3; Zhang, Jianfeng1
刊名JOURNAL OF COMPUTATIONAL PHYSICS
出版日期2022-07-15
卷号461页码:17
ISSN号0021-9991
关键词Anisotropy Poynting vector Fast wave-mode separation Elastic reverse time migration Unstructured mesh
DOI10.1016/j.jcp.2022.111200
英文摘要We present a phase velocity-related Poynting vector in elastic modeling that represents the direction of the phase velocity rather than that of the group velocity as obtained by the conventional Poynting vector. This yields a highly efficient wave-mode separation scheme for vector elastic reverse time migration (ERTM), especially in anisotropic cases. We separate qP- and qSV-waves by first obtaining the polarization vector based on the proposed Poynting vector using an analytical formula and then performing a coordinate transformation based on the resulting polarization vector. Only a tiny amount of additional storage or computation is required. We provide a numerical implementation under both regular and unstructured meshes, thus allowing for spatially varying grid sizes according to the local velocities as well as accurate description of interface topographies. A Poynting vector and unstructured-mesh-based anisotropic ERTM scheme was then proposed. The resulting scheme can yield migrated opening-angle gathers related to qP- and qSV-waves without extra effort. The accuracy and efficiency of the resulting scheme are verified by several numerical examples of two-dimensional transverse isotropic media.(c) 2022 Elsevier Inc. All rights reserved.
WOS关键词IMAGING CONDITION ; ANGLE GATHERS ; DECOMPOSITION ; DOMAIN ; 2D ; POLARIZATION ; MEDIA
资助项目National Key R&D Program of China[2020YFA0713402] ; National Natural Science Foundation of China[42030802]
WOS研究方向Computer Science ; Physics
语种英语
出版者ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号WOS:000802129600001
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/106055]  
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Zhang, Jianfeng
作者单位1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.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		 Wang, Xiaoyi,Zhang, Jianfeng. Fast wave-mode separation in anisotropic elastic reverse time migration using the phase velocity-related Poynting vector[J]. JOURNAL OF COMPUTATIONAL PHYSICS,2022,461:17.
APA Wang, Xiaoyi,&Zhang, Jianfeng.(2022).Fast wave-mode separation in anisotropic elastic reverse time migration using the phase velocity-related Poynting vector.JOURNAL OF COMPUTATIONAL PHYSICS,461,17.
MLA Wang, Xiaoyi,et al."Fast wave-mode separation in anisotropic elastic reverse time migration using the phase velocity-related Poynting vector".JOURNAL OF COMPUTATIONAL PHYSICS 461(2022):17.

入库方式： OAI收割

来源：地质与地球物理研究所

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