Exact and approximate reflection and transmission coefficient for incident qP wave in TTI media

doi:10.3969/j.issn.0001-5733.2011.01.022

	Exact and approximate reflection and transmission coefficient for incident qP wave in TTI media
	Liang Kai 1,2; Yin Xing-Yao 1; Wu Guo-Chen 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011
卷号	54 期号:1 页码:208-217
关键词	Tti Media Reflection Coefficient Transmission Coefficient Weak Anisotropy Approximation Avo
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.01.022
文献子类	Article
英文摘要	Anisotropy of media is one of the key factor of influence on amplitude vs offset (AVO). This paper derived the exact and approximate reflection and transmission coefficient expressions of plane waves in two elastic transversely-isotropic (TTI) media with tilted symmetry axis under welded contact condition by extending the expressions of Aki and Richards, and River. Based on displacement wave function, we establish the quasi Zoeppritz equation for incident qP wave in TTI media using boundary condition of displacement continuation and stress continuation, and obtain the exact solutions. According to weak anisotropy approximation and the theory of media decomposition, we derive the approximate reflection and transmission coefficient for incident qP wave in TTI media. The expressions have definite geophysical meanings and bring higher accuracy than others. The P-P approximate expression indicates that the vertical transversely-isotropic (VTI) has no influence for the intercept of PP reflection coefficient (reflection coefficient when incident angle equals zero), but has influence for the gradient of PP reflection coefficient. TTI has influence for the intercept and gradient of PP reflection coefficient. For VTI media the parameter delta controls the small-angle reflection coefficient, while epsilon becomes influential at larger incidence angle. But for TTI media, the parameter epsilon and delta are all influential at both small and larger incidence angle reflection coefficient.
WOS关键词	TRANSVERSELY ISOTROPIC MEDIA ; ANISOTROPIC MEDIA ; PART I ; REFRACTION ; SYMMETRY ; VELOCITY ; AXIS ; AVO
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000286848200022
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73508]
专题	中国科学院地质与地球物理研究所
通讯作者	Liang Kai
作者单位	1.China Univ Petr E China, Coll Georesources & Informat, Dongying 266555, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Liang Kai,Yin Xing-Yao,Wu Guo-Chen. Exact and approximate reflection and transmission coefficient for incident qP wave in TTI media[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(1):208-217.
APA	Liang Kai,Yin Xing-Yao,&Wu Guo-Chen.(2011).Exact and approximate reflection and transmission coefficient for incident qP wave in TTI media.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(1),208-217.
MLA	Liang Kai,et al."Exact and approximate reflection and transmission coefficient for incident qP wave in TTI media".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.1(2011):208-217.