Optimal variable-grid finite-difference modeling for porous media

doi:10.1088/1742-2132/11/6/065011

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	Optimal variable-grid finite-difference modeling for porous media
	Liu, Xinxin 1; Yin, Xingyao 2; Li, Haishan 3
刊名	JOURNAL OF GEOPHYSICS AND ENGINEERING
	2014
卷号	11 期号:6 页码:-
关键词	porous media staggered-grid finite-difference method variable grid-spacing variable time-step numerical dispersion
ISSN号	1742-2132
DOI	10.1088/1742-2132/11/6/065011
英文摘要	Numerical modeling of poroelastic waves by the finite-difference (FD) method is more expensive than that of acoustic or elastic waves. To improve the accuracy and computational efficiency of seismic modeling, variable-grid FD methods have been developed. In this paper, we derived optimal staggered-grid finite difference schemes with variable grid-spacing and time-step for seismic modeling in porous media. FD operators with small grid-spacing and time-step are adopted for low-velocity or small-scale geological bodies, while FD operators with big grid-spacing and time-step are adopted for high-velocity or large-scale regions. The dispersion relations of FD schemes were derived based on the plane wave theory, then the FD coefficients were obtained using the Taylor expansion. Dispersion analysis and modeling results demonstrated that the proposed method has higher accuracy with lower computational cost for poroelastic wave simulation in heterogeneous reservoirs.
学科主题	数学地质与计算机技术
WOS关键词	PERFECTLY MATCHED LAYER ; WAVE-PROPAGATION ; TIME-STEPS ; DISCONTINUOUS GRIDS ; BOUNDARY-CONDITION ; POROELASTIC MEDIA ; SIMULATION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000348844600008
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40314]
专题	中国地质调查局青岛海洋地质研究所
作者单位	1.Minist Land Resources, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China 2.Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China 3.China Univ Petr, Sch Geosci, Qingdao 266580, Peoples R China 4.Petrochina, Res Inst Petr Explorat & Dev Northwest, Lanzhou 730020, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xinxin,Yin, Xingyao,Li, Haishan. Optimal variable-grid finite-difference modeling for porous media[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2014,11(6):-.
APA	Liu, Xinxin,Yin, Xingyao,&Li, Haishan.(2014).Optimal variable-grid finite-difference modeling for porous media.JOURNAL OF GEOPHYSICS AND ENGINEERING,11(6),-.
MLA	Liu, Xinxin,et al."Optimal variable-grid finite-difference modeling for porous media".JOURNAL OF GEOPHYSICS AND ENGINEERING 11.6(2014):-.