Numerical Simulation of Water Flooding Development in Low Permeability Reservoirs with a Discrete Fracture Model

A discrete fracture model is used to simulate water flooding in low permeability reservoirs considering nonlinear flow characteristic of matrix system.At first,we reduce dimension of fractures and propose a mathematical model.On this basis,unstructured grid and control volume finite difference method are applied to numerical computation considering complex geometry of fractures.Accuracy of simulator is validated through a simple example.At last,two water-injection tests are performed to analyze effect of different non-Darcy flow models.