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

	Prestack depth migration by hybrid method with high precision and its parallel implementation
	Zhang, WS ; Zhang, GQ
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2001-07-01
卷号	44 期号:4 页码:542-551
关键词	wavefield splitting hybrid method prestack depth migration splitting method MPI parallel
ISSN号	0001-5733
英文摘要	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.
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000170181000013
内容类型	期刊论文
源URL	[http://ir.amss.ac.cn/handle/2S8OKBNM/16126]
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.