A high-efficiency ray-tracing method for 3-D TTI media

doi:10.6038/cjg2018K0606

	A high-efficiency ray-tracing method for 3-D TTI media
	Yang YingHang 1,2,3,4; Wang ZhenLi 1,3,4; Xu Tao 1,5; Yang ChangChun 1,3,4
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2018-04-01
卷号	61 期号:4 页码:1421-1433
关键词	3-D TTI media 3-D VTI media Ray tracing Coordinate transformation Bond transformation
ISSN号	0001-5733
DOI	10.6038/cjg2018K0606
文献子类	Article
英文摘要	The TTI medium is one of the most commonly used anisotropic materials in seismic prospecting. Thus, study on rapid calculation of ray paths and travel time in a 3-D TTI medium is a significant subject. Because 21 elastic parameters of the TTI medium are usually nonzero, the traditional method needs to use the Bond transformation and the most complicated ray tracing equations to do ray tracing for this medium. A multiple-layer TTI model can be treated as a VTI model by utilizing coordinate transformation. Thus, on contrast to the traditional method, we derive the ray tracing equations of the 3-D VTI medium and then utilize 3-D VTI ray tracing equations and coordinate transformation to acquire trajectory and traveltime of body waves in the TTI medium. Theoretical analysis and CPU time consuming analysis show that the efficiency of our method is about 4 times higher than that of the traditional method. To examine the feasibility of this method, we build four single layer models and two multilayer models. The experiments on these models indicate that the wavefronts of P, SV and SH waves are exactly the same as the theoretical group velocity surface even in strong anisotropic models and other special cases.
WOS关键词	GAUSSIAN-BEAM MIGRATION ; TRAVEL-TIME TOMOGRAPHY ; COMPLEX LAYERED MEDIA ; FAST SWEEPING METHOD ; FAST MARCHING METHOD ; ANISOTROPIC MEDIA ; WAVE-PROPAGATION ; TRANSMISSION COEFFICIENTS ; HETEROGENEOUS MEDIA ; ELASTIC-ANISOTROPY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000430371500017
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88272]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang ZhenLi
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Yang YingHang,Wang ZhenLi,Xu Tao,et al. A high-efficiency ray-tracing method for 3-D TTI media[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(4):1421-1433.
APA	Yang YingHang,Wang ZhenLi,Xu Tao,&Yang ChangChun.(2018).A high-efficiency ray-tracing method for 3-D TTI media.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(4),1421-1433.
MLA	Yang YingHang,et al."A high-efficiency ray-tracing method for 3-D TTI media".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.4(2018):1421-1433.