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Fast wave-mode separation in anisotropic elastic reverse time migration using the phase velocity-related Poynting vector
Wang, Xiaoyi1,2; Zhang, Jianfeng3
2022-07-15
Source PublicationJOURNAL OF COMPUTATIONAL PHYSICS
ISSN0021-9991
Volume461Pages:17
AbstractWe 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.
KeywordAnisotropy Poynting vector Fast wave-mode separation Elastic reverse time migration Unstructured mesh
DOI10.1016/j.jcp.2022.111200
Funding OrganizationNational 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
WOS KeywordIMAGING CONDITION ; ANGLE GATHERS ; DECOMPOSITION ; DOMAIN ; 2D ; POLARIZATION ; MEDIA
Language英语
Funding ProjectNational Key R&D Program of China[2020YFA0713402] ; National Natural Science Foundation of China[42030802]
Funding OrganizationNational 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
WOS Research AreaComputer Science ; Physics
WOS SubjectComputer Science, Interdisciplinary Applications ; Physics, Mathematical
WOS IDWOS:000802129600001
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106055
Collection油气资源研究院重点实验室
Corresponding AuthorZhang, Jianfeng
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
First Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Recommended Citation
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.
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