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Elastic reverse time migration angle gathers using a stabilized Poynting vector without zero points within the wave propagation ranges

文献类型：期刊论文

作者Yang, Kai1,2; Wang, Xiaoyi3; Zhang, Jianfeng1,2
刊名GEOPHYSICS
出版日期2022-05-01
卷号87期号:3页码:S137-S150
ISSN号0016-8033
DOI10.1190/GEO2021-0415.1
英文摘要Generation of PP and PS angle gathers for elastic reverse time migration (ERTM) has important applications in velocity model updating and subsurface parameter inversion. The Poyntingvector-based method provides a cost-effective way to extract angle gathers from ERTM. However, the estimated propagation directions or angles based on Poynting vectors at or near zero points are unstable, and the reflection energy at these points is likely to be placed in an incorrect angle bin. This instability problem severely limits its use in the generation of high-quality angle gathers. To overcome this problem, we add the conventional Poynting vector with an ancillary one of the Hilbert transformed wavefield, a 90 degrees phase-shifted version of the original wavefield. The Poynting vector of the Hilbert transformed wavefield points in the same propagation direction as the conventional Poynting vector, but they have different zero-point distributions. Adding them together allows us to obtain a stabilized Poynting vector which thoroughly eliminates the zero points within the wave propagation range, and thus we obtain a stable algorithm to extract high-quality angle gathers from ERTM. The Hilbert transformed wavefield already exists in the P/S and up/down wavefield decomposition procedure, which has become a necessary step for ERTM to separate overlapping wavefields at reflectors before the computation of Poynting vectors. Results from two synthetic numerical examples indicate the effectiveness of our method in generating high quality angle gathers for ERTM.
WOS关键词COMMON-IMAGE GATHERS ; VELOCITY ANALYSIS ; 2 ALGORITHMS ; DOMAIN ; DECOMPOSITION ; 3D ; SEPARATION
资助项目National Natural Science Fund of China[42030802] ; National Key R&D Program of China[2020YFA0713402] ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology[ZDSYS20190902093007855]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000793463300006
出版者SOC EXPLORATION GEOPHYSICISTS
资助机构National Natural Science Fund of China ; National Natural Science Fund of China ; National Key R&D Program of China ; National Key R&D Program of China ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Key R&D Program of China ; National Key R&D Program of China ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Key R&D Program of China ; National Key R&D Program of China ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; National Natural Science Fund of China ; National Natural Science Fund of China ; National Key R&D Program of China ; National Key R&D Program of China ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology ; Shenzhen Key Laboratory of Deep Off-shore Oil and Gas Exploration Technology
源URL[http://ir.iggcas.ac.cn/handle/132A11/105927]  
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, Shenzhen Key Lab Deep Offshore Oil & Gas Explorat, Shenzhen, Peoples R China
2.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, 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		 Yang, Kai,Wang, Xiaoyi,Zhang, Jianfeng. Elastic reverse time migration angle gathers using a stabilized Poynting vector without zero points within the wave propagation ranges[J]. GEOPHYSICS,2022,87(3):S137-S150.
APA Yang, Kai,Wang, Xiaoyi,&Zhang, Jianfeng.(2022).Elastic reverse time migration angle gathers using a stabilized Poynting vector without zero points within the wave propagation ranges.GEOPHYSICS,87(3),S137-S150.
MLA Yang, Kai,et al."Elastic reverse time migration angle gathers using a stabilized Poynting vector without zero points within the wave propagation ranges".GEOPHYSICS 87.3(2022):S137-S150.

入库方式： OAI收割

来源：地质与地球物理研究所

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