Experimental Investigation on the Stress-Dependent Permeability of Intact and Fractured Shale

doi:10.1155/2020/8897911

	Experimental Investigation on the Stress-Dependent Permeability of Intact and Fractured Shale
	Zheng, Yongxiang 2,3; Liu, Jianjun 1,3; Liu, Yichen 3,4; Shi, Di 1,3; Zhang, Bohu 3
刊名	GEOFLUIDS
	2020-09-10
卷号	2020 页码:16
ISSN号	1468-8115
DOI	10.1155/2020/8897911
英文摘要	The permeability of shale is extremely low. Therefore, the shale reservoir needs fracturing. The fracture network by fracturing can increase the permeability in a stimulated shale reservoir. To understand the permeability evolution in the stimulated shale reservoir, this study measured the permeability of intact and fractured shale samples with different pore pressure and confining pressure by the transient pulse test. And the differences between the two kinds of samples in permeability were analyzed. The results show that permeability magnitude of fractured shale is increased by 5 orders compared to the intact shale. It means that fracture networks after fracturing can effectively improve the permeability. Besides, the change in matrix permeability is the result of the combined effect of slippage effect and matrix deformation. At low pore pressure, the influence of slippage effect is more significant. Based on the results, an improved exponential function was established to describe the relationship between permeability and effective stress of shale matrix. Moreover, the permeability of fractured shale is still bigger than that of the shale matrix when the confining pressure is larger than pore pressure. This paper provides theoretical guidance for studying the evolution of reservoir permeability before and after fracturing.
WOS研究方向	Geochemistry & Geophysics ; Geology
语种	英语
出版者	WILEY-HINDAWI
WOS记录号	WOS:000574333700001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24875]
专题	中科院武汉岩土力学所
通讯作者	Liu, Jianjun
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Peoples R China 2.Shijiazhuang Tiedao Univ, Sch Civil Engn, Shijiazhuang, Hebei, Peoples R China 3.Southwest Petr Univ, Sch Geosci & Technol, Chengdu, Peoples R China 4.Sichuan Coalfield Geol Bur, Team 141, Deyang, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Yongxiang,Liu, Jianjun,Liu, Yichen,et al. Experimental Investigation on the Stress-Dependent Permeability of Intact and Fractured Shale[J]. GEOFLUIDS,2020,2020:16.
APA	Zheng, Yongxiang,Liu, Jianjun,Liu, Yichen,Shi, Di,&Zhang, Bohu.(2020).Experimental Investigation on the Stress-Dependent Permeability of Intact and Fractured Shale.GEOFLUIDS,2020,16.
MLA	Zheng, Yongxiang,et al."Experimental Investigation on the Stress-Dependent Permeability of Intact and Fractured Shale".GEOFLUIDS 2020(2020):16.