The Study Of An Integrated Pipe Network Model For Simulation Of Fractured Reservoirs

The fractured reservoirs in the world are half of the whole proved-up reserves, and vital to the world's oil and gas production. As far as the distribution of the fractured reservoirs is concerned in China, the geologic reserve is comparatively high. Now, there are many experts working in research of fractured reservoir simulation, and have suggested some models for modeling fractured reservoirs, such as Dual Porosity/Permeability Model, Single Porosity Model and Discrete Fractured Network Model. However, there is certain limitation in the oil-field development for the above models. Systematical study in fractured reservoir simulation is very important. In this paper, based on the mechanism of fluid flow in porous medium, the Pipe Network Model for simulation of fractured reservoirs, which only considers the fluid flow in porous medium, is established. Then, based on the mechanism of fluid flow in porous medium and the mechanism of fluid flow in pipes, the Integrated Pipe Network Model for simulation of fractured reservoirs, which considers both the fluid flow in porous medium and the fluid flow in pipes, is established. In this model, the condition that only one kind of medium can flow into the well is considered. And, the semi-implicit method is used for the numerical model of the two-dimensional and two-phase reservoirs. Based on this model, a simulator is developed with Matlab Language. Because until now there is no simulator which can considers both the fluid flow in porous medium and the fluid flow in pipes, this paper just shows the simulation result of the Integrated Pipe Network Model. The result of the Integrated Pipe Network Model in this paper indicates that the result is reliable through the theoretic model.