COMPARISON OF SHEAR AND TENSILE FRACTURE PERMEABILITY IN GRANITE UNDER LOADING-UNLOADING STRESS CONDITONS

	COMPARISON OF SHEAR AND TENSILE FRACTURE PERMEABILITY IN GRANITE UNDER LOADING-UNLOADING STRESS CONDITONS
	Su, Xiaopeng 4,5; Liu, Jialiang 4,5; Liu, Hejuan 3; Zhou, Lei 2; Li, Honglian 2; Chen, Junchao 1
刊名	JOURNAL OF POROUS MEDIA
	2021
卷号	24 期号:12 页码:93-114
关键词	shear and tensile fractures permeability loading and unloading stress dependence
ISSN号	1091-028X
英文摘要	It is of great significance to evaluate the fracture permeability after reservoir stimulation for geothermal extraction. This paper is focused on evaluating the permeability of two kinds of fractures-shear and tensile fracture generated by mechanical force in a laboratory. It is found that the permeability of tensile fractures is 1.5-3.5 times as much as the shear fracture under loading and unloading stress from 1 to 60 to 1 MPa. Both shear and tensile fractures experience a relative high permeability reduction (i.e., up to 99%) under loading stress, while the absolute permeability reduction of a shear fracture is much lower than that of a tensile fracture. The tensile fracture experiences a much higher absolute permeability enhancement under unloading stress. When it comes to the whole loading and unloading cycle, shear fracture has a lower absolute but a higher relative permeability reduction. Three models (i.e., the exponential, power, and Walsh models) were used to evaluate the stress dependence of permeability. In total, the stress sensibility of permeability in loading stress is higher than that in unloading stress. And this sensibility for shear fractures is higher than that of tensile fractures in loading stress while it is lower than that of tensile fractures in unloading stress, which causes the higher relative permeability reduction in shear fractures. The suitability check of the models shows that the exponential model is not suitable for data under unloading stress, the Walsh model has a better suitability for data under loading stress than that under unloading stress, and the power-law model is suitable for data under both loading and stresses.
资助项目	National Natural Science Foundation of China[51904042] ; Science Foundation of Chongqing Jiaotong University[20JDKJC-B029] ; China Postdoctoral Science Foundation[2020M683257]
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	BEGELL HOUSE INC
WOS记录号	WOS:000709776600006
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28396]
专题	中科院武汉岩土力学所
通讯作者	Liu, Hejuan
作者单位	1.Xihua Univ, Sch Emergency Sci, Chengdu 610039, Peoples R China 2.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China 5.Chongqing Jiaotong Univ, State Key Lab Mt Bridges & Tunnel Engn, Chongqing 400074, Peoples R China
推荐引用方式 GB/T 7714	Su, Xiaopeng,Liu, Jialiang,Liu, Hejuan,et al. COMPARISON OF SHEAR AND TENSILE FRACTURE PERMEABILITY IN GRANITE UNDER LOADING-UNLOADING STRESS CONDITONS[J]. JOURNAL OF POROUS MEDIA,2021,24(12):93-114.
APA	Su, Xiaopeng,Liu, Jialiang,Liu, Hejuan,Zhou, Lei,Li, Honglian,&Chen, Junchao.(2021).COMPARISON OF SHEAR AND TENSILE FRACTURE PERMEABILITY IN GRANITE UNDER LOADING-UNLOADING STRESS CONDITONS.JOURNAL OF POROUS MEDIA,24(12),93-114.
MLA	Su, Xiaopeng,et al."COMPARISON OF SHEAR AND TENSILE FRACTURE PERMEABILITY IN GRANITE UNDER LOADING-UNLOADING STRESS CONDITONS".JOURNAL OF POROUS MEDIA 24.12(2021):93-114.