Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration

	Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration
	Zhang Jian-Feng; Lu Bao-Kun; Liu Li-Nong
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2008
卷号	51 期号:1 页码:221-227
关键词	wave equation based depth migration frequency-dependent varying-step depth extrapolation wavefield interpolation
ISSN号	0001-5733
文献子类	Article
英文摘要	We propose a frequency-dependent varying-step depth extrapolation scheme and a table-driven, one-point wavefield interpolation technique for the wave equation based migration methods. The former reduces the computational cost of wavefield depth extrapolation, and the latter reconstructs the extrapolated wavefield with an equal, desired vertical step with high computational efficiency. The proposed varying-step depth extrapolation plus one-point interpolation scheme results in 2/3 reduction in computational cost when compared to the conventional equal-step depth extrapolation of wavefield, but gives the almost same imaging. We present the scheme using the optimum split-step Fourier method on the 2-D Marmousi dataset and 3-D field dataset. The results demonstrate the high computational efficiency of the scheme in the absence of loss of accuracy. The proposed scheme can also be used by other wave equation based migration methods of the frequency domain.
WOS关键词	FINITE-DIFFERENCE MIGRATION ; FIELD EXTRAPOLATION ; FOURIER
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000252841900027
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69330]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang Jian-Feng
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang Jian-Feng,Lu Bao-Kun,Liu Li-Nong. Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(1):221-227.
APA	Zhang Jian-Feng,Lu Bao-Kun,&Liu Li-Nong.(2008).Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(1),221-227.
MLA	Zhang Jian-Feng,et al."Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.1(2008):221-227.