裂缝性油藏有限元数值模拟

Numerical Simulation Study on Fractured Reservoir

本文基于DFN模型研究裂缝性油藏渗流机理,推导其全耦合矩阵形式的有限元解法,建立了基于压力,饱和度的有限元方程。对具有控制油藏渗流的大裂缝特性进行研究,考虑基质毛管力,忽略裂缝中毛管力影响,采用四边形网格,针对DFN模型的渗流问题进行了模拟计算,得到油藏渗流动态结果,为裂缝性油藏的优化开发及精细油藏数值模拟提供理论依据。

Based on DFN model, we studied the percolation mechanism of fractured reservoir and deduced its full coupling matrix form of t＇mite element solution. Then we established the finite element equations based on the pressure and saturability. The fractured reservoir which has large cracks was particularly researched. With the consideration of matrix capillary force, we simulate the reservoir flow dynamics of DFN model. It provided a theoretical basis of fine reservoir simulation and optimized the development of the fractured reservoir.