Vector elastic reverse time migration based on unstructured mesh for 2D tilted TI medium

doi:10.6038/cjg20171219

	Vector elastic reverse time migration based on unstructured mesh for 2D tilted TI medium
	Lu Yong-Ming 1,2,3; Zhang Jian-Feng 1,2; Yang Kai 1,3; Hu Jin-Yin 4
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2017-12-01
卷号	60 期号:12 页码:4776-4789
关键词	Unstructured Grid Anisotropic Elastic Rtm Wave-mode Separation
ISSN号	0001-5733
DOI	10.6038/cjg20171219
文献子类	Article
英文摘要	The extrapolated multi-component wavefields contain both compressional waves and shear waves. Whether these two wave modes can be separated from the wavefields makes differences for isotropic and anisotropic elastic reverse time migration. The separation methods based on divergence and curl operators only perform perfectly in isotropic media, whereas do not work well in anisotropic medium. On the basis of elastic wave numerical simulation scheme of irregular and unstructured grids, a wave-mode separation approach which is suitable for anisotropic media is developed. This method firstly extracts the relationship between the phase angle and polarizing angle by solving the Christoffel equation, then directly obtains the relationship between group angle and polarizing angle through bridging group angle and phase angle. Compared with the existing methods, the computational efficiency of this producer is improved with a small storage capacity. By testing the simple anisotropicmodels and SEG anisotropic Hess model, the validity of our scheme proposed in this paper is proved.
WOS关键词	TRANSVERSELY ISOTROPIC MEDIA ; WAVE-MODE SEPARATION ; ANISOTROPIC MEDIA ; HETEROGENEOUS MEDIA ; GRID METHOD ; VTI MEDIA ; DECOMPOSITION ; PROPAGATION ; DOMAIN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000418626400019
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82304]
专题	中国科学院地质与地球物理研究所
通讯作者	Lu Yong-Ming
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.R&D Ctr BGP CNPC, Zhuozhou 072751, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Lu Yong-Ming,Zhang Jian-Feng,Yang Kai,et al. Vector elastic reverse time migration based on unstructured mesh for 2D tilted TI medium[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2017,60(12):4776-4789.
APA	Lu Yong-Ming,Zhang Jian-Feng,Yang Kai,&Hu Jin-Yin.(2017).Vector elastic reverse time migration based on unstructured mesh for 2D tilted TI medium.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,60(12),4776-4789.
MLA	Lu Yong-Ming,et al."Vector elastic reverse time migration based on unstructured mesh for 2D tilted TI medium".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 60.12(2017):4776-4789.