The Research Of The Dense Oil Reservoir Of Horizontal Well Volume Fracture Optimization

In recent years, People has paid more and more attention on the development of tightsandstone reservoir.And piecewise, multi,cluster fracturing technology has the goodproSPEcts for development. From the results on the volume fracturing researchs in China andabroad, We can know normally the numerical analysis method to study the reservoir seepageflow problem is by finite difference methods.But there are limitations for the problem ofirregular geometry and the SPEcial boundary conditions. As an effective numerical analysismethod, the finite element method shows its advantages in the simulation of artificialfractures.So in recent years, more and more scholars apply the application of finite elementmethod to the artificial fracturing problem. But aimed at the numerical simulation problems ofvolume fracturing,eSPEcially the simulation research on complex fracture cracks aftervolume fracturing is not deep enough.Based on the full theoretical investigation and combining the basic principle of finiteelement method, Establish and solve Oil-water two phase seepage finite elementequation,which considering the pressure gradient.We can get a numerical simulation sofewareof finite element analysis.It can be used for the complex fracture system.Through theSeepage law analysis of different segments, different length of cracks and productionperformance,we can get the optimal number.The reform volume also has an important effecton tight reservoir volume fracturing. Analysis with the dynamic production through thedifferent scheme, we can give the optimal transformation volume when the fracture halflength is240m.