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Finite-difference modeling of 3D frequency-domain elastic wave equation using an affine mixed-grid method

文献类型：期刊论文

作者Dong, Shu-Li1,2,3; Chen, Jing-Bo1,2,3
刊名GEOPHYSICS
出版日期2023-03-01
卷号88期号:2页码:T45-T63
ISSN号0016-8033
DOI10.1190/GEO2022-0074.1
英文摘要In seismic frequency-domain finite-difference modeling, the numerical accuracy depends on how mass and partial differ-ential terms are discretized in the acoustic/elastic wave equa-tion. For the mass term(s), a combination of consistent and lumped mass methods is widely accepted. For the partial differ-ential terms, there exist many discretization technologies, such as the average-derivative method (ADM) and the rotated mixed-grid method (RMM). In comparison with the ADM, which focuses on the media interior, the RMM is excellent at handling the media interior and free-surface boundary simul-taneously. However, the existing RMMs are based on the orthogonal coordinate transformation and suffer from the re-striction of cube-grid sampling. Affine coordinate systems do not restrict the axes to be orthogonal. By introducing the 3D affine coordinate transformations to the RMM, we have devel-oped an affine mixed-grid method and generated an optimal 27-point scheme for the 3D elastic wave equation. Our scheme removes the sampling restriction of cubic mesh, thus working for general cuboid mesh. In addition, it provides consistent ex-pressions in the whole computational domain, thus improving the accuracies of the internal and free-surface grid points si-multaneously. Dispersion analysis and numerical examples demonstrate that our scheme provides acceptable accuracy with five points per minimal S-wavelength for the internal and free-surface points with arbitrary spatial grid intervals.
WOS关键词FREE-SURFACE EXPRESSION ; DERIVATIVE OPTIMAL SCHEME ; FORM INVERSION ; SCALAR ; PROPAGATION ; SOLVER ; SPACE
资助项目National Natural Science Foundation of China[42074159] ; National Natural Science Foundation of China[41874163]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者SOC EXPLORATION GEOPHYSICISTS - SEG
WOS记录号WOS:000983203400001
资助机构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 Natural Science Foundation 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 Natural Science Foundation 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 Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/110927]  
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Chen, Jing-Bo
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Shu-Li,Chen, Jing-Bo. Finite-difference modeling of 3D frequency-domain elastic wave equation using an affine mixed-grid method[J]. GEOPHYSICS,2023,88(2):T45-T63.
APA Dong, Shu-Li,&Chen, Jing-Bo.(2023).Finite-difference modeling of 3D frequency-domain elastic wave equation using an affine mixed-grid method.GEOPHYSICS,88(2),T45-T63.
MLA Dong, Shu-Li,et al."Finite-difference modeling of 3D frequency-domain elastic wave equation using an affine mixed-grid method".GEOPHYSICS 88.2(2023):T45-T63.

入库方式： OAI收割

来源：地质与地球物理研究所

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