Prestack depth migration by hybrid method with high precision and its parallel implementation

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	Prestack depth migration by hybrid method with high precision and its parallel implementation
	Zhang, WS ; Zhang, GQ
	2001-07-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
卷号	44 期号:4 页码:542-551
摘要	Prestack depth migration is an important imaging method for complex geological structures. In this paper a generalized system of wavefield continuation is presented based on the wavefield splitting theory. The system is coupled by downgoing and upgoing waves, and the commonly used equation of wavefield continuation is only a special case of the coupled system. Based on the approximation of square root operator, a new hybrid migration method with high precision is derived. The method can be implemented numerically through splitting technique. Finally, two numerical migration examples are given, one is the poststack depth migration for a model with large lateral velocity contrasts, another is the prestack depth migration for Marmousi model with complex structures. The numerical results show the effectiveness and high precision of the method. The MPI parallel calculation is adopted in order to raise computational efficiency. The method can be used to obtain precise images for complex structures with large lateral velocity variations.
关键词	wavefield splitting hybrid method prestack depth migration splitting method MPI parallel
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000170181000013
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/16127
专题	中国科学院数学与系统科学研究院
通讯作者	Zhang, WS
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, State Key Lab Sci & Engn Comp, Beijing 10080, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, WS,Zhang, GQ. Prestack depth migration by hybrid method with high precision and its parallel implementation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2001,44(4):542-551.
APA	Zhang, WS,&Zhang, GQ.(2001).Prestack depth migration by hybrid method with high precision and its parallel implementation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,44(4),542-551.
MLA	Zhang, WS,et al."Prestack depth migration by hybrid method with high precision and its parallel implementation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 44.4(2001):542-551.