裂缝性低渗透双重孔隙介质产能动态数值模拟

Numerical Simulation of Productivity Performance in Low Permeability Fractured Dual-pore Medium Reservoirs

低渗透油田开发与裂缝密切相关,与常规油藏相比,低渗透裂缝油藏裂缝和基质中产能动态复杂多变,如何计算、预测和分析裂缝和基质的产能动态是低渗透油田开发的重要任务。采用理论研究及数值模拟的方法,将天然裂缝表征成果应用到油藏工程研究中,提出了结合地质科学和油藏工程数据来表征和研究低渗透裂缝性油藏特征的方法,在前人研究的基础上建立了裂缝系统和基质系统的连续性方程和辅助方程,开发了预测低渗透裂缝油藏开发动态的数值模拟器,来定量研究基质-裂缝之间的流体交换和产能动态。最后利用实例对表征方法和模拟器进行了验证,这对于制定裂缝性低渗透油藏开发方案和优化油藏采收率有重要的指导作用。

The development of low permeable oilfield was closely related with fractures,compared with the conventional oil reservoirs,the productivity in the fractures of oil reservoirs and the matrix were complicated and diversified,how to calculate,forecast and the analyze the productivity of fractures and matrix was an important task for the low permeability oilfield development.By using theoretical research and the numerical simulation,result of natural fracture characterization was used to study the reservoir engineering,it was proposed that geosciences were combined with the data of reservoir engineering to characterize the reservoir features.On the basis of predecessors'study,the continuity and subsidiary equations of the fractureal system and the matrix system were established,the numerical simulator was developed for forecasting the development of low permeability fracture oil reservoirs,this simulator could quantitatively forecast the fluid exchanges of matrix-fracture oil reservoirs.An example is used to demonstrate the method and the simulator.This research has important instruction function to make development program and optimize oil recovery for low permeability oil reservoirs.