TY - JOUR

T1 - Modeling hydraulic cracks and inclusion interaction using XFEM

AU - He, Bo

AU - Zhuang, Xiaoying

N1 - Funding information: The authors gratefully acknowledge the support received from the NSFC Program (51474157), State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (SKLGDUEK1526), Science and Technology Commission of Shanghai Municipality (16QA1404000), and Fundamental Research Funds for the Central Universities. The authors have no interest conflict to declare. The authors gratefully acknowledge the support received from the NSFC Program ( 51474157 ), State Key Laboratory for Geomechanics and Deep Underground Engineering , China University of Mining & Technology ( SKLGDUEK1526 ), Science and Technology Commission of Shanghai Municipality ( 16QA1404000 ), and Fundamental Research Funds for the Central Universities .

PY - 2018/9

Y1 - 2018/9

N2 - In this study, we employ a coupled hydromechanical model to study the hydraulic fracture propagation path in porous media under the influence of existing pressurized voids. The hydraulic fracturing field study reveals that the existing natural voids and cracks alter the local properties of the porous media and influence the fracture propagation pattern. We incorporate these phenomena into the presented hydromechanical model, which is constructed from the mass and momentum balance equations for saturated porous media. The extended finite element method (XFEM) is applied for modeling the fluid flow through discrete cracks. The nonlinear hydromechanical equations are solved by the Newton–Raphson scheme with an implicit time integration procedure. Finally, numerical examples are presented and compared with experimental results. It is found that the fracture propagation path is significantly influenced by the existing pressurized voids and essential properties of the porous media; that is, the crack trends to propagate towards the pressurized voids.

AB - In this study, we employ a coupled hydromechanical model to study the hydraulic fracture propagation path in porous media under the influence of existing pressurized voids. The hydraulic fracturing field study reveals that the existing natural voids and cracks alter the local properties of the porous media and influence the fracture propagation pattern. We incorporate these phenomena into the presented hydromechanical model, which is constructed from the mass and momentum balance equations for saturated porous media. The extended finite element method (XFEM) is applied for modeling the fluid flow through discrete cracks. The nonlinear hydromechanical equations are solved by the Newton–Raphson scheme with an implicit time integration procedure. Finally, numerical examples are presented and compared with experimental results. It is found that the fracture propagation path is significantly influenced by the existing pressurized voids and essential properties of the porous media; that is, the crack trends to propagate towards the pressurized voids.

KW - Crack propagation

KW - Hydraulic fractures

KW - Porous media

KW - XFEM

UR - http://www.scopus.com/inward/record.url?scp=85063499447&partnerID=8YFLogxK

U2 - 10.1016/j.undsp.2018.04.005

DO - 10.1016/j.undsp.2018.04.005

M3 - Article

AN - SCOPUS:85063499447

VL - 3

SP - 218

EP - 228

JO - Underground Space (China)

JF - Underground Space (China)

SN - 2096-2754

IS - 3

ER -