Anisotropic finite-difference algorithm for modeling elastic wave propagation in fractured coalbeds

doi:10.1190/GEO2010-0240.1

	Anisotropic finite-difference algorithm for modeling elastic wave propagation in fractured coalbeds
	Pei, Zhenglin 1,2; Fu, Li-Yun 1; Sun, Weijia 1; Jiang, Tao 1,3; Zhou, Binzhong 4
刊名	GEOPHYSICS
	2012
卷号	77 期号:1 页码:C13-C26
ISSN号	0016-8033
DOI	10.1190/GEO2010-0240.1
文献子类	Article
英文摘要	The simulation of wave propagations in coalbeds is challenged by two major issues: (1) strong anisotropy resulting from high-density cracks/fractures in coalbeds and (2) numerical dispersion resulting from high-frequency content (the dominant frequency can be higher than 100 Hz). We present a staggered-grid high-order finite-difference (FD) method with arbitrary even-order (2L) accuracy to overcome the two difficulties stated above. First, we derive the formulae based on the standard Taylor series expansion but given in a neat and explicit form. We also provide an alternative way to calculate the FD coefficients. The detailed implementations are shown and the stability condition for anisotropic FD modeling is examined by the eigenvalue analysis method. Then, we apply the staggered-grid FD method to 2D and 3D coalbed models with dry and water-saturated fractures to study the characteristics of the 2D/3C elastic wave propagation in anisotropic media. Several factors, like density and direction of vertical cracks, are investigated. Several phenomena, like S-wave splitting and waveguides, are observed and are consistent with those observed in a real data set. Numerical results show that our formulae can correlate the amplitude and traveltime anisotropies with the coal seam fractures.
WOS关键词	TRANSVERSELY ISOTROPIC MEDIUM ; MEDIA ; MULTICOMPONENT ; DENSITIES ; CRACKS ; ROCKS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SOC EXPLORATION GEOPHYSICISTS
WOS记录号	WOS:000300767000026
资助机构	Natural Science Foundation of China(40830423 ; Natural Science Foundation of China(40830423 ; National Basic Research Program(2009CB219307) ; National Basic Research Program(2009CB219307) ; 40925013) ; 40925013) ; Natural Science Foundation of China(40830423 ; Natural Science Foundation of China(40830423 ; National Basic Research Program(2009CB219307) ; National Basic Research Program(2009CB219307) ; 40925013) ; 40925013) ; Natural Science Foundation of China(40830423 ; Natural Science Foundation of China(40830423 ; National Basic Research Program(2009CB219307) ; National Basic Research Program(2009CB219307) ; 40925013) ; 40925013) ; Natural Science Foundation of China(40830423 ; Natural Science Foundation of China(40830423 ; National Basic Research Program(2009CB219307) ; National Basic Research Program(2009CB219307) ; 40925013) ; 40925013)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84448]
专题	中国科学院地质与地球物理研究所
通讯作者	Pei, Zhenglin
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing, Peoples R China 2.N NewTech PetroTech Ltd, Beijing, Peoples R China 3.Univ Houston, Houston, TX USA 4.CSIRO Earth Sci & Resource Engn, Kenmore, Australia
推荐引用方式 GB/T 7714	Pei, Zhenglin,Fu, Li-Yun,Sun, Weijia,et al. Anisotropic finite-difference algorithm for modeling elastic wave propagation in fractured coalbeds[J]. GEOPHYSICS,2012,77(1):C13-C26.
APA	Pei, Zhenglin,Fu, Li-Yun,Sun, Weijia,Jiang, Tao,&Zhou, Binzhong.(2012).Anisotropic finite-difference algorithm for modeling elastic wave propagation in fractured coalbeds.GEOPHYSICS,77(1),C13-C26.
MLA	Pei, Zhenglin,et al."Anisotropic finite-difference algorithm for modeling elastic wave propagation in fractured coalbeds".GEOPHYSICS 77.1(2012):C13-C26.