Finite Element Numerical Simulation Of Fractured Reservoir Based On Discrete Fracture Network Model

Fractured reservoir occupies an important position in the reservoir development,especially the fracturing technology development has special function to improve reservoir recovery factor.Therefore,the numerical simulation of fracture to influence the development of reservoir seepage dynamic to guide the fractured reservoir development and fracturing fractured reservoir development have a great significance.The numerical simulation of fracture reservoir is mainly based on some special fracture morphology.So,it cannot reflect the real fracture morphology of the impact on the development,The technology cannot provide more accurate and more practical information for production performance.So far,the numerical simulation of fracture is mainly based on the use of finite difference method.The fracture is described as straight line and plane,mainly uses the method of mesh refinement reflect the presence of fracture.So,the reality description of fracture cannot achieve more precise requirements.And this is much more of limited for the study of seepage flow with complex fracture morphology.Therefore,in this paper,combined with the discrete fracture network model and based on finite element method.The seepage problem has established the method of reservoir numerical simulation of two-dimensional oil-water two-phase flow.The fracture is described as a line and using arbitrary quadrilateral element description matrix unit based on the Galerkin method for solving finite element.The simulator get a stable result based on object oriented programming by C++.This paper present the effect of water injection for the development of dynamic reservoir with basic two-dimensional water seepage equation.The implications of the reservoir dynamic production include the fracture length,,the number of fractures and complex fracture morphology.And obtain various saturation distribution map and the curve of water cut,provides a new approach for the numerical simulation of fractured reservoir.It's a important significance for the reservoir development.