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Model parameter design for modeling surface topography in VTI elastic finite-difference near-surface simulations

文献类型：期刊论文

作者Zhou, Xuhui2,3; Huo, Shoudong2,3; Wang, Hao2,3; Dong, Shuli2,3; Liang, Yao1; Cao, Jian2,3
刊名GEOPHYSICS
出版日期2023-03-01
卷号88期号:2页码:C33-C52
ISSN号0016-8033
DOI10.1190/GEO2022-0027.1
英文摘要The near-surface anisotropy is one of the factors leading to an inaccurate velocity estimation in the shallow area, which has a strong impact on the static correction of land data and seismic imaging of the subsurface in depth. To investigate the anisotropy influence, the consideration of medium anisotropy in near -surface seismic modeling becomes necessary. In the oil and gas industry, finite-difference (FD) methods are commonly used for seismic wave modeling, thanks to their simplicity, accuracy, and high efficiency. However, for near-surface modeling, the imple-mentation of free-surface boundary conditions and nonflat topography representation are the two main obstacles prevent-ing the effectiveness of FD methods. To address these two issues in the vertical transversely isotropic anisotropic scenarios, we have developed a simple and efficient method for the discrete model design which can be easily applied to the conventional Cartesian-grid FD modeling. Our method involves: (1) the parameter-averaging method for implicitly implementing the stress-free condition by a modification of model anisotropy parameters near the (non) flat free-surface boundary and (2) an independent wavefield superposition with modeling re-sults of different parameter configurations to accurately re-present the rugged topography and significantly reduce the staircase diffractions caused by a staircase approximation of continuous surface in the Cartesian-grid discretization. For val-idation of this method, we conduct several numerical tests in 2D and 3D spaces. The accuracy is demonstrated by a comparison of the spectral-element solutions of SPECFEM in modeling the seismic wave propagation in the presence of an irregular free surface. From the aspect of computational efficiency, it is more promising in practical applications due to the use of wavefield superposition strategy in this method which does not require finer spatial sampling to eliminate the staircase diffractions.
WOS关键词WAVE-FORM INVERSION ; MIGRATION VELOCITY ANALYSIS ; BOUNDARY-CONDITIONS ; SEISMIC MOTION ; PROPAGATION ; FIELD ; MEDIA ; ANISOTROPY ; EXPRESSION ; SCHEMES
资助项目National Key R&D Program of China[2021YFA0716901] ; National Natural Science Founda- tion of China[41904114] ; National Natural Science Founda- tion of China[41804135] ; National Natural Science Founda- tion of China[41904096]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000983180200001
出版者SOC EXPLORATION GEOPHYSICISTS - SEG
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 Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion 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 Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion 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 Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion 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 Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion of China ; National Natural Science Founda- tion of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/110915]  
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Cao, Jian
作者单位1.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam, Minist Nat Resources, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Xuhui,Huo, Shoudong,Wang, Hao,et al. Model parameter design for modeling surface topography in VTI elastic finite-difference near-surface simulations[J]. GEOPHYSICS,2023,88(2):C33-C52.
APA Zhou, Xuhui,Huo, Shoudong,Wang, Hao,Dong, Shuli,Liang, Yao,&Cao, Jian.(2023).Model parameter design for modeling surface topography in VTI elastic finite-difference near-surface simulations.GEOPHYSICS,88(2),C33-C52.
MLA Zhou, Xuhui,et al."Model parameter design for modeling surface topography in VTI elastic finite-difference near-surface simulations".GEOPHYSICS 88.2(2023):C33-C52.

入库方式： OAI收割

来源：地质与地球物理研究所

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