首页|A phase-field model for simulating the propagation behavior of mixed-mode cracks during the hydraulic fracturing process in fractured reservoirs

A phase-field model for simulating the propagation behavior of mixed-mode cracks during the hydraulic fracturing process in fractured reservoirs

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A novel phase-field model for the propagation of mixed-mode hydraulic fractures,characterized by the formation of mixed-mode fractures due to the interactions between fluids and solids,is proposed.In this model,the driving force for the phase field consists of both tensile and shear components,with the fluid contribution primar-ily manifesting in the tension driving force.The displacement and pressure are solved simultaneously by an implicit method.The numerical solution's iterative format is estab-lished by the finite element discretization and Newton-Raphson(NR)iterative methods.The correctness of the model is verified through the uniaxial compression physical exper-iments on fluid-pressurized rocks,and the limitations of the hydraulic fracture expansion phase-field model,which only considers mode I fractures,are revealed.In addition,the influence of matrix mode Ⅱ fracture toughness value,natural fracture mode Ⅱ toughness value,and fracturing fluid injection rate on the hydraulic fracture propagation in porous media with natural fractures is studied.

mixed-mode crackhydraulic fracturingporo-elasticityphase-field method(PFM)

Dan ZHANG、Liangping YI、Zhaozhong YANG、Jingqiang ZHANG、Gang CHEN、Ruoyu YANG、Xiaogang LI

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State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China

Tarim Oilfield Company,PetroChina,Bayingolin Mongolian Autonomous Prefecture 841000,Xinjiang Uygur Autonomous Region,China

Wuqi Oil Production Plant,Shaanxi Yanchang Petroleum,Xi'an 716000,China

Exploration Division of PetroChina Southwest Oil and Gasfield Company,Chengdu 610041,China

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National Natural Science Foundation of China

42202314

2024

10.1007/s10483-024-3113-9

应用数学和力学(英文版)
上海大学

应用数学和力学(英文版)

影响因子：0.294
ISSN：0253-4827
年,卷(期)：2024.45(5)
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