Evolution of permeability during the process of shale gas extraction

doi:10.1016/j.jngse.2017.10.018

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Evolution of permeability during the process of shale gas extraction
	Wei, Mingyao 2; Elsworth, Derek 4; Cui, Guanglei 2,3; Liu, Jishan 1; Feng, Xiating2
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2018
卷号	49 页码:94-109
关键词	Shale permeability Matrix heterogeneity Mass transfer Stress transfer Strain evolution
ISSN号	1875-5100
DOI	10.1016/j.jngse.2017.10.018
英文摘要	The sensitivity of shale permeability to effective stress has been reported widely in the literature but the relation between them is not always consistent with the principle of effective stress. This knowledge gap defines our specific research goals: (1) to resolve the inconsistency between the evolution of shale permeability and the effective stress principle, and (2) to incorporate the evolution of shale permeability into the evaluation of shale gas production rate. In this study, we define shale blocks bounded by artificially introduced hydraulic fractures. At block scale the system comprises two components represented by inorganic and organic components. Unlike previous studies, we assume that the organic system is embedded within the inorganic system and both systems are dual porosity media. We define the shale permeability as a function of strains representing the stress transfer between fractures and matrix. These permeability-strain relations (shale permeability models) are then used to couple the governing equations of shale deformation and gas flow. The composite suite of equations are then solved by a commercial PDE solver. We use the coupled model to generate typical evolution profiles of shale permeability under stress-controlled conditions for the cases of both gas injection and gas desorption. These profiles are consistent with experimental observations as reported widely in the literature. We also use the coupled model to examine how the shale permeability evolves during the extraction of shale gas. Model results show that the evolutions of both shale permeability and gas production rate at field scale are primarily controlled by the contrasts in both the transport and deformation properties of the reservoir and the interfacial dynamics of mass and effective stress transfer between matrix and fractures.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000418516900009
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4185]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	1.Univ Western Australia, Sch Mech & Chem Engn; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Univ Chinese Acad Sci ; 4.Penn State Univ, Ctr & Energy Inst G3, Dept Energy & Mineral Engn, University Pk
推荐引用方式 GB/T 7714	Wei, Mingyao,Elsworth, Derek,Cui, Guanglei,et al. Evolution of permeability during the process of shale gas extraction[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,49:94-109.
APA	Wei, Mingyao,Elsworth, Derek,Cui, Guanglei,Liu, Jishan,&Feng, Xiating.(2018).Evolution of permeability during the process of shale gas extraction.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,49,94-109.
MLA	Wei, Mingyao,et al."Evolution of permeability during the process of shale gas extraction".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 49(2018):94-109.