Phase-Field Modelling of Hydraulic Fracturing in Porous Media
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This study presents a comprehensive analysis of phase field modelling in for simulating hydraulic failure of poroelastic media based on Biot's poroelastic theory. The focus in this context is on overcoming the challenges associated with crack width estimation. A new strain-based crack width formulation is proposed, which improves the accuracy of fracture permeability prediction. The coupled equation of hydromechanical damage is derived as the governing equation of the phase field model. A benchmark KGD validation, demonstrates the model's ability to simulate hydraulic fracture in porous media and confirms the model’s accuracy and reliability. This article provides a comprehensive study of phase field modelling in COMSOL MultiPhysics for simulating hydraulic fracture in poroelastic media. The proposed strain-based crack width formulation and consideration of crack propagation contribute to improving the accuracy of fracture permeability prediction.
