Factorization synthesized-shot prestack depth migration in the helical coordinate system

	Factorization synthesized-shot prestack depth migration in the helical coordinate system
	Zhang, WS; Zhang, GQ
	2003-07-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
卷号	46 期号:4 页码:520-525
摘要	Based on the synthesized-shot prestack depth migration, a new high efficient method for the synthesized-shot prestack depth migration is proposed. It is a hybrid technique which implements wavefield extrapolation with factorization in the helical coordinate system. The wavefield extrapolation is divided into two explicit solving processes. One is a causal process, and the other is an anticausal process. Such explicit solving processes in the helical coordinate system can improve the wavefield extrapolation efficiency. Moreover, based on the phase encoding principle, the synthesized-wavefield corresponding to multiple ray parameters is encoded and stacked. Then the calculations are implemented with MPI parallel algorithm based on the ray parameters. Thus the calculation efficiency is enhanced further. After deriving the relevant formulae and analyzing the computation cost quantitatively, numerical calculations for the Marmousi complex model are carried out and results comparisons are made. The imaging results show that the method presented in this paper has the advantages of high precision and good efficiency. So it can be applied to practical data processing.
关键词	prestack depth migration helical coordinate system fractorization hybrid method wavefield synthesizing MPI parallel
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000184512900014
出版者	SCIENCE CHINA 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/19014
专题	计算数学与科学工程计算研究所
通讯作者	Zhang, WS
作者单位	Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhang, WS,Zhang, GQ. Factorization synthesized-shot prestack depth migration in the helical coordinate system[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2003,46(4):520-525.
APA	Zhang, WS,&Zhang, GQ.(2003).Factorization synthesized-shot prestack depth migration in the helical coordinate system.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,46(4),520-525.
MLA	Zhang, WS,et al."Factorization synthesized-shot prestack depth migration in the helical coordinate system".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 46.4(2003):520-525.