气候变化领域集成服务门户(CCPortal): Comparison between the Fourier finite-difference method and the generalized-screen method

CCPortal

DOI	10.1111/j.1365-2478.2008.00748.x
	Comparison between the Fourier finite-difference method and the generalized-screen method
	Zhang, Jin-Hai; Wang, Wei-Min; Yao, Zhen-Xing
通讯作者	Zhang, JH (通讯作者)
发表日期	2009
ISSN	0016-8025
EISSN	1365-2478
起始页码	355
结束页码	365
卷号	57 期号:3
英文摘要	The Fourier finite-difference propagator and the generalized-screen propagator are two general high-order forms of one-way dual-domain methods. We compare these two propagators mainly on phase accuracy, computational efficiency and 3D extension. A comparison of phase accuracy shows that the high-order generalized-screen propagator is preferable to the Fourier finite-difference propagator for heterogeneous media with a weak velocity contrast and wide dip angle. With increasing velocity contrast, the accuracy improvement gained by the high-order generalized-screen propagator declines rapidly. The Fourier finite-difference propagator is more robust and flexible to lateral velocity variations than the generalized-screen propagator. The 2D Fourier finite-difference propagator is superior to the 2D generalized-screen propagator when the velocity contrast is stronger than 23%. Despite the two-way splitting error, the 3D Fourier finite-difference propagator is more accurate than the second-order generalized-screen propagator when the velocity contrast is stronger than 20% and is more accurate than the fourth-order generalized-screen propagator when the velocity contrast is stronger than 40%. Numerical experiments on the SEG/EAGE salt model demonstrate that the Fourier finite-difference propagator behaves better than the generalized-screen propagator when imaging steep salt boundary and faults beneath the salt body. Under the same hardware and software conditions, the computational cost of the Fourier finite-difference propagator in our implementation is greater than that of the second-order generalized-screen propagator but smaller than that of the third-order generalized-screen propagator. Compared with the Fourier finite-difference propagator, the generalized-screen propagator requires fewer grid points per wavelength and has more potential to improve running speed in the presence of a much faster Fourier transform. These analyses are applicable for both forward modelling and depth migration.
关键词	DEPTH MIGRATION ONE-WAY EXTRAPOLATION PROPAGATION
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000264821200004
来源期刊	GEOPHYSICAL PROSPECTING
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257631
推荐引用方式 GB/T 7714	Zhang, Jin-Hai,Wang, Wei-Min,Yao, Zhen-Xing. Comparison between the Fourier finite-difference method and the generalized-screen method[J]. 中国科学院青藏高原研究所,2009,57(3).
APA	Zhang, Jin-Hai,Wang, Wei-Min,&Yao, Zhen-Xing.(2009).Comparison between the Fourier finite-difference method and the generalized-screen method.GEOPHYSICAL PROSPECTING,57(3).
MLA	Zhang, Jin-Hai,et al."Comparison between the Fourier finite-difference method and the generalized-screen method".GEOPHYSICAL PROSPECTING 57.3(2009).