Forward modeling and reverse time migration of viscoacoustic media using decoupled fractional Laplacians

doi:10.6038/cjg20170425

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	Forward modeling and reverse time migration of viscoacoustic media using decoupled fractional Laplacians
	Wu Yu 1,2; Fu Li-Yun 1; Chen Gao-Xiang 1,2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017-04-01
卷号	60 期号:4 页码:1527-1537
关键词	Constant Q wave equation in time domain Fractional Laplacians Decoupled dispersion and attenuation Forward modeling and reverse time migration in viscoacoustic media
ISSN号	0001-5733
DOI	10.6038/cjg20170425
文献子类	Article
英文摘要	Modeling seismic wave propagation in attenuating media accounts for the effective anelastic characteristics of the real earth. Numerical solution of the constant Q wave equation in the time domain requires a lot of memory and has low computational efficiency because of the fractional time derivative, which limits the wide use in solving inverse problems, e.g., seismic migration. We evaluate a time-domain wave equation expressed by a second-order temporal derivative and two fractional Laplacian operators for modeling acoustic wave propagation in attenuating media. The wave equation introduces separated amplitude loss and phase velocity dispersion operators. The separated forms are more useful in compensating for attenuation loss in inverse problems, such as reverse time imaging by only reversing sign of the attenuation operator and leaving the sign of the dispersion operator unchanged. The other advantage of using our formulation over the traditional fractional time derivative approach is the avoidance of time history memory variables and thus it offers more economic computations.
WOS关键词	WAVE-PROPAGATION ; VELOCITY DISPERSION ; ATTENUATION ; DOMAIN ; MEMORY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000399967500025
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/41596]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Wu Yu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu Yu,Fu Li-Yun,Chen Gao-Xiang. Forward modeling and reverse time migration of viscoacoustic media using decoupled fractional Laplacians[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(4):1527-1537.
APA	Wu Yu,Fu Li-Yun,&Chen Gao-Xiang.(2017).Forward modeling and reverse time migration of viscoacoustic media using decoupled fractional Laplacians.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(4),1527-1537.
MLA	Wu Yu,et al."Forward modeling and reverse time migration of viscoacoustic media using decoupled fractional Laplacians".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.4(2017):1527-1537.