Abstract：In the paper we completely and systematically elaborate the controlling equations and FEM coupling methods for numeric simulation of hydraulic fracturing. The framework is consist of: (1) The concept of poroexpansibility is employed to couple the fluid pore pressure with the stress field; (2) An formula of hydraulic fracture opening is proposed based on the concepts of damage localization;(3) Deduce the formula for calculation of anisotropic properties such as damage, permeability, poroelasticity, etc; (4) Propose a coupling loading scheme using full flow rate. As a validation, a three-Dimensional hydraulic fracturing simulation is performed. The comparison of numeric solution and analytical solution of the state parameters of the hydraulic fracture is performed and proved the validation and correction of the numeric simulation.
2017, Vol. 38 
