Numerical investigation of poroelastic effects during hydraulic fracturing using XFEM combined with cohesive zone model

Hydraulic fracturing is an effective technology used to stimulate hydrocarbon production from unconventional reservoirs. Numerical simulation of the hydraulic process plays a key role in design fracturing. However, most existing models are overly simplified by neglecting poroelasticity rock matrix, which may have substantial effect on growth fractures, especially oil and/or water saturated formations. In this study, we developed fully coupled finite element model for fracture propagation permeable formations combining XFEM technique with cohesive zone model, and it investigate effects geometry evolution single initiated injection point. Fluid flow within Darcy fractures propagation, fluid leak-off into formation simultaneously taking account model. Then, validated comparing results available analytical solutions. To understand quantify poroelastic fracture, several cases different matrix permeability, coefficients, bulk modulus pore performed. The show that total volume leakage controlled combined action permeability coefficient. aperture length decrease increase or coefficient, while as moduli increases, tend increase.