Unstable crack growth in hydraulic fracturing: The combined effects of pressure and shear stress for a power-law fluid

doi:10.1016/j.engfracmech.2018.11.032

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	Unstable crack growth in hydraulic fracturing: The combined effects of pressure and shear stress for a power-law fluid
	Shen WH(沈文豪)1,2; Yang FQ 3; Zhao YP(赵亚溥)1,2
通讯作者	Zhao, Ya-Pu(yzhao@imech.ac.cn)
发表期刊	ENGINEERING FRACTURE MECHANICS
	2020-02-15
卷号	225 页码:19
ISSN	0013-7944
摘要	The underlying mechanisms of hydraulic fracturing remain elusive, and the optimization of the related processes for rocks of low permeability is challenging. There exists local crack closure induced by shear stress, which is one of the crack instabilities for a straight crack. In this study, we develop a full-stress model, which includes the combined effects of hydrodynamic pressure and shear stress on the crack surfaces. The hydrodynamic pressure is a driving force, while the shear stress is a resistance force. A novel criterion for crack propagation is derived based on the asymptotic solution of shear stress. The asymptotic solution, which is derived using perturbation analysis in the toughness-dominant regime, reveals the existence of the crack-closure phenomenon and shear-stress-dominant regime. The necessary condition for the crack closure is obtained according to numerical calculations. An energy analysis is conducted to discuss the difference between the shear-stress-dominant and the viscosity-dominant regimes. The existence of the crack closure is shown to be independent of two assumptions, lubrication theory and no-fluid-lag zone. The results presented in this study are useful for the simulation and design of hydraulic fracturing.
关键词	Hydraulic fracturing Full-stress model Shear stress Unstable crack Crack-closure criterion
DOI	10.1016/j.engfracmech.2018.11.032
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000507345600039
关键词[WOS]	PROPAGATION ; DRIVEN ; TIP
WOS研究方向	Mechanics
WOS类目	Mechanics
资助项目	National Natural Science Foundation of China (NSFC)[11872363] ; National Natural Science Foundation of China (NSFC)[51861145314] ; National Natural Science Foundation of China (NSFC)[U1562105] ; Chinese Academy of Sciences (CAS) through CAS Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences[QYZDJ-SSW-JSC019] ; CAS Strategic Priority Research Program[XDB22040401] ; Opening Fund of State Key Laboratory of Nonlinear Mechanics (LNM)
项目资助者	National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) through CAS Interdisciplinary Innovation Team Project ; CAS Key Research Program of Frontier Sciences ; CAS Strategic Priority Research Program ; Opening Fund of State Key Laboratory of Nonlinear Mechanics (LNM)
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Zhao, Ya-Pu
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81305
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA
推荐引用方式 GB/T 7714	Shen WH,Yang FQ,Zhao YP. Unstable crack growth in hydraulic fracturing: The combined effects of pressure and shear stress for a power-law fluid[J]. ENGINEERING FRACTURE MECHANICS,2020,225:19.
APA	沈文豪,Yang FQ,&赵亚溥.(2020).Unstable crack growth in hydraulic fracturing: The combined effects of pressure and shear stress for a power-law fluid.ENGINEERING FRACTURE MECHANICS,225,19.
MLA	沈文豪,et al."Unstable crack growth in hydraulic fracturing: The combined effects of pressure and shear stress for a power-law fluid".ENGINEERING FRACTURE MECHANICS 225(2020):19.

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