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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 FQ3; Zhao YP(赵亚溥)1,2
Corresponding AuthorZhao, Ya-Pu(yzhao@imech.ac.cn)
Source PublicationENGINEERING FRACTURE MECHANICS
2020-02-15
Volume225Pages:19
ISSN0013-7944
AbstractThe 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.
KeywordHydraulic fracturing Full-stress model Shear stress Unstable crack Crack-closure criterion
DOI10.1016/j.engfracmech.2018.11.032
Indexed BySCI ; EI
Language英语
WOS IDWOS:000507345600039
WOS KeywordPROPAGATION ; DRIVEN ; TIP
WOS Research AreaMechanics
WOS SubjectMechanics
Funding ProjectNational 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)
Funding OrganizationNational 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)
Classification二类/Q1
Ranking1
ContributorZhao, Ya-Pu
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81305
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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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