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

文献类型：期刊论文

作者Pei, Zhenglin1,2; Fu, Li-Yun1; Sun, Weijia1; Jiang, Tao1,3; Zhou, Binzhong4
刊名GEOPHYSICS
出版日期2012
卷号77期号:1页码:C13-C26
ISSN号0016-8033
DOI10.1190/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
WOS记录号WOS:000300767000026
出版者SOC EXPLORATION GEOPHYSICISTS
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)
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.

入库方式： OAI收割

来源：地质与地球物理研究所

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