Quantitative study on coal permeability evolution with consideration of shear dilation

doi:10.1016/j.jngse.2016.05.007

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	Quantitative study on coal permeability evolution with consideration of shear dilation
	Zhang, Shouwen 2; Wei, Mingyao 1,2; Liu, Jishan 2; Feng, Xiating2 ; Wang, Chunguang 3; Fang, Kai 3; Zhou, Fubao 1; Xia, Tongqiang 1,2
	2016
会议日期	SEP 06-08, 2015
会议地点	Wuhan, PEOPLES R CHINA
关键词	Coal permeability Gas sorption Coal swelling Shear dilation Effective stress
卷号	36
DOI	10.1016/j.jngse.2016.05.007
页码	1199-1207
英文摘要	Although coal permeability has been largely investigated, its changes caused by shear dilation of fractures are rarely reported possibly because it's often underestimated by many models. This work develops a new model of coal permeability with consideration of fracture deformation under influences of both normal and shear stresses. It is coupled with the existing models of coal deformation in the matrix system as well as gas flow and transport in the fracture system. Lastly, the fully coupled mode is applied to calculate the evolution of coal permeability during coalbed gas production. The results show that coal permeability increases with the decreasing reservoir pressure, while the fracture permeability decreases nonlinearly with the increasing normal stress and increases with the increasing shear dilation, all of which are well consistent with field data. The application of this model in a case study also indicates that the fully coupled model with consideration of shear dilation is superior to previous models. (C) 2016 Elsevier B.V. All rights reserved.
源文献作者	Int Soc Rock Mech, Chinese Acad Sci, Inst Rock Soil Mech, Natl State Key Lab Geomechan & Geotechnical Engn
会议录	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
会议录出版者	ELSEVIER SCI LTD
会议录出版地	OXFORD
语种	英语
WOS研究方向	Energy & Fuels ; Engineering
WOS记录号	WOS:000390830300009
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4912]
专题	岩土力学所知识全产出_会议论文岩土力学所知识全产出国家重点实验室知识产出_会议论文
作者单位	1.China Univ Min & Technol, State Key Lab Coal Resources & Safe Min ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Shandong Univ Sci & Technol, Dept Engn Mech
推荐引用方式 GB/T 7714	Zhang, Shouwen,Wei, Mingyao,Liu, Jishan,et al. Quantitative study on coal permeability evolution with consideration of shear dilation[C]. 见:. Wuhan, PEOPLES R CHINA. SEP 06-08, 2015.