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Fast Poynting-vector based wave-mode separation and RTM in 2D elastic TI media
Liu, Qiancheng1; Zhang, Jianfeng2; Lu, Yongming2; Gao, Hongwei2; Liu, Shaolin3; Zhang, Hao2
2019-03-15
Source PublicationJOURNAL OF COMPUTATIONAL PHYSICS
ISSN0021-9991
Volume381Pages:27-41
AbstractThe wave-modes in isotropic elastic media are easy to get separated by using Helmholtz decomposition. This method, however, fails in TI (transverse isotropic) media due to the anisotropy, and more sophisticated operators are required. Most of these existing operators are implemented and limited in FD (finite-difference) stencil. We propose a Poynting-vector based method, which separates wave-modes pointwisely, independent of the modeling stencils. In TI media, the Poynting-vector indicates the group-velocity direction while the wave-modes get separated in the polarization-vector direction. We write the relationship between these two directions into a small numerical table by exploiting the phase-velocity direction as a bridge prior to wavefield propagation. During the modeling process, it is easy to estimate the group-velocity direction from the Poynting vector, and then we can get the polarization-vector direction to separate wave-modes by checking the numerical table. We test our method on several TI models. We furthermore apply our method to elastic reverse-time migration (RTM) in TI media. (C) 2019 Elsevier Inc. All rights reserved.
KeywordWave propagation Elasticity Anisotropy Wave separation
DOI10.1016/j.jcp.2018.12.024
Funding OrganizationKing Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST)
WOS KeywordSPECTRAL ELEMENT METHOD ; FINITE-DIFFERENCE ; PROPAGATION
Language英语
Funding ProjectKing Abdullah University of Science and Technology (KAUST)
Funding OrganizationKing Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST) ; King Abdullah University of Science and Technology (KAUST)
WOS Research AreaComputer Science ; Physics
WOS SubjectComputer Science, Interdisciplinary Applications ; Physics, Mathematical
WOS IDWOS:000458147100002
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90501
Collection中国科学院地质与地球物理研究所
Corresponding AuthorLiu, Qiancheng
Affiliation1.King Abdullah Univ Sci & Technol, Div Phys Sci & Engn, Thuwal, Saudi Arabia
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
3.Nanyang Technol Univ, Sch Phys & Math Sci, Div Math Sci, Singapore, Singapore
Recommended Citation
GB/T 7714
Liu, Qiancheng,Zhang, Jianfeng,Lu, Yongming,et al. Fast Poynting-vector based wave-mode separation and RTM in 2D elastic TI media[J]. JOURNAL OF COMPUTATIONAL PHYSICS,2019,381:27-41.
APA Liu, Qiancheng,Zhang, Jianfeng,Lu, Yongming,Gao, Hongwei,Liu, Shaolin,&Zhang, Hao.(2019).Fast Poynting-vector based wave-mode separation and RTM in 2D elastic TI media.JOURNAL OF COMPUTATIONAL PHYSICS,381,27-41.
MLA Liu, Qiancheng,et al."Fast Poynting-vector based wave-mode separation and RTM in 2D elastic TI media".JOURNAL OF COMPUTATIONAL PHYSICS 381(2019):27-41.
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