Micro-scale investigation on coupling of gas diffusion and mechanical deformation of shale

doi:10.1016/j.petrol.2019.01.039

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

	Micro-scale investigation on coupling of gas diffusion and mechanical deformation of shale
	Wei, Mingyao ; Liu, Yingke ; Liu, Jishan ; Elsworth, Derek ; Zhou, Fubao
刊名	JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
	2019
卷号	175 期号:-页码:961-970
关键词	Nanopores Micro-scale Explicit simulation approach Diffusion coefficient
ISSN号	0920-4105
DOI	10.1016/j.petrol.2019.01.039
英文摘要	The nanopore structure usually exhibit complex geometry in the shale formation. The interactions between gas and pore structure in such heterogeneous property impacts the properties of shale gas transport in micro-scale. The precise description of this shale gas flow processes in detail is impossible if the micropore is not properly characterized. Thus, this study provides a simulation approach to model the complex geometry of nanopore structures in the shale formation. Based on SEM image segmentation of the shale matrix, the geometry of three compositions (nanopore, kerogen, and matrix) are explicitly simulated. Mass storage, transport mechanisms, and geomechanical properties are fully modeled in the micro-scale model. It demonstrates that the conventional dual porosity model fails to capture the storage and transport mechanisms in micro-scale by comparison with the micro-scale model. The simulation results reveal that stress-induced decrease of the diffusion coefficient is both time-dependent and space-dependent. The reduction of the diffusion coefficient can significantly cut down the adsorbed gas production in kerogen. It results in the low recovery rate of shale gas that a large proportion of adsorbed gas is unable to liberate. Moreover, the later stage of gas production is depended on the supply of adsorbed gas in kerogen.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
WOS记录号	WOS:000458153000077
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/15018]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.China Univ Min & Technol, IoT Percept Mine Res Ctr, Xuzhou 221116, Jiangsu, Peoples R China; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 3.China Univ Min & Technol, Fac Safety Engn, Xuzhou 221116, Jiangsu, Peoples R China; 4.China Univ Min & Technol, Minist Educ, Key Lab Gas & Fire Control Coal Mines, Xuzhou 221116, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wei, Mingyao,Liu, Yingke,Liu, Jishan,et al. Micro-scale investigation on coupling of gas diffusion and mechanical deformation of shale[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2019,175(-):961-970.
APA	Wei, Mingyao,Liu, Yingke,Liu, Jishan,Elsworth, Derek,&Zhou, Fubao.(2019).Micro-scale investigation on coupling of gas diffusion and mechanical deformation of shale.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,175(-),961-970.
MLA	Wei, Mingyao,et al."Micro-scale investigation on coupling of gas diffusion and mechanical deformation of shale".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 175.-(2019):961-970.