Numerical Simulation Of In-Fracture Explosion

"In-fracture explosion" is a new technology in low-permeability field development. While the process of explosion,the length and angle of fracture are random by the affection of many factor,this increase the difficulty to simulate complex fractures after "In-fracture explosion".Finite Element Method can precise simulate complex boundary and Grid are divided into arbitrary.Reasonable description and simulate to complex fractures after "In-fracture explosion" are successful.Starting form basic differential equation finite element model of two-phase flow is established based on Finite Element Method theory. In this model, fractures are idealized as lines in two-dimensional. With the assumption of continuity of pressures across the fracture-matrix boundary.The meshes of matrix use the arbitrary shape quadrilateral element. Those equations are dispersed in space by isoparametric element method and in time by using backward difference. A numerical simulator is established by FORTRAN and get steady results.The low steady of simulate two-phase complex problem by Finite Element Method is resolved.By comparing to example of ECLIPSE software the accuracy and correctness of the finite element mathematical model is verified. On this basic,The influence of four variants to the production performance of fractured well, such as fracture number, fracture length and complicated fracture are simulate by the use of numerical simulator. The pressure field and saturation field are given. The influence of different fracture parameters to production performance curves is deeply analyzed.The complex percolation mechanism after "In-fracture explosion" is deeply understood and can supply theoretical guidance to the pplication in field.