Study On The Volume Fracturing Numerical Simulation In Tight-oil Reservoir Of Waterflood

In recent years, tight reservoir development get more and more people’s attention, and segmented multibank fracturing technology has good prospects for development. Synthesis of existing research results shows that the volume of fracturing present numerical analysis study of reservoir flow problems and more to the finite difference method based, but irregular geometry and special boundary conditions have significant limitations. The finite element method as an effective method of numerical analysis, the simulation of artificial cracks reflects its advantages, so in recent years more and more scholars finite element method in fractured wells on artificial problem. But for volume fracturing simulation problems, especially the study of numerical simulation of complex fissures produced after fracturing volume is not deep enough, further research is needed.This paper established a water two phases flow finite element equation, prepared for complex fracture system volume after fracturing numerical reservoir simulator. To facilitate the complex fracture after fracturing numerical simulation of volume, after the transformation of the complex fracture treatment into two parts the main seam and high permeability alteration zone penetration through the transformation of the region’s history matching of single well determined. On this basis, the effects of starting pressure gradient of volume fracturing capacity; for seven law Well, the influence of the number of stages of fracturing effect on the volume of the end of the fracture half-length and overall fracture half length optimized, and study the influence of the transformation of volume to volume fracturing effect. For five-spot well pattern, the influence of the number of stages of fracturing effect on the volume.