Permeability Evolution Characteristics of Intact and Fractured Shale Specimens

doi:10.1007/s00603-021-02603-y

	Permeability Evolution Characteristics of Intact and Fractured Shale Specimens
	Yang, Sheng-Qi 1,2; Yin, Peng-Fei 1; Xu, Shuai-Bo 1
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2021-08-17
期号	-页码:20
关键词	Shale Bedding plane Effective stress Anisotropic permeability Fracture permeability
ISSN号	0723-2632
DOI	10.1007/s00603-021-02603-y
英文摘要	The permeability of shale reservoirs is an important parameter in evaluating the feasibility of shale gas commercial exploitation. The influence of structural anisotropy, bedding planes, and effective stress is of great significance to the permeability of shale reservoirs; thus, a further study on the permeability of shale rock containing bedding planes and fractures is necessary. In this paper, to investigate the gas conductivity of shale rock in different bedding directions and fracture surfaces, permeability tests were conducted on the intact specimens with different bedding inclinations and specimens containing fractures of Longmaxi shale. The pulse decay method is adopted in the determination of the intact shale specimen, and the steady-state method is adopted to measure the permeability of fractured shale specimen. Combined with experiments and theoretical analysis, the anisotropic characteristics of the permeability of intact shale specimens and the permeability of fractured specimens under the applying of effective stress are studied. The permeability of the two kinds of shale specimens decreased exponentially with the increase in effective stress. The main controlling factors on permeability were studied, besides, the flow characteristic of fluid inside the rock with bedding plane or sandwich structures were described. Furthermore, a new model was proposed to describe the anisotropy of rock permeability characteristics. As for shale specimen contains fracture, the function between its equivalent permeability and fracture permeability was derived, as well as the function between equivalent permeability and effective stress, and the function between fracture permeability and effective stress.
资助项目	National Natural Science Foundation of China[42077231] ; Six Talents Peak Project in Jiangsu Province[JNHB-090] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, China Academy of Sciences[Z019024]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000685605100001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27707]
专题	中科院武汉岩土力学所
作者单位	1.China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, 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
推荐引用方式 GB/T 7714	Yang, Sheng-Qi,Yin, Peng-Fei,Xu, Shuai-Bo. Permeability Evolution Characteristics of Intact and Fractured Shale Specimens[J]. ROCK MECHANICS AND ROCK ENGINEERING,2021(-):20.
APA	Yang, Sheng-Qi,Yin, Peng-Fei,&Xu, Shuai-Bo.(2021).Permeability Evolution Characteristics of Intact and Fractured Shale Specimens.ROCK MECHANICS AND ROCK ENGINEERING(-),20.
MLA	Yang, Sheng-Qi,et al."Permeability Evolution Characteristics of Intact and Fractured Shale Specimens".ROCK MECHANICS AND ROCK ENGINEERING .-(2021):20.