低渗透砂岩油藏水平井开发物理模拟研究

通过常规压汞测试分析天然砂岩露头的孔隙结构特征，并与实际低渗透油层孔隙结构对比．论证了采用低渗透砂岩露头制作物理模型，以模拟低渗透油藏水平井开发过程的可行性，解决了人工填砂模型难以模拟低渗透油藏的问题。以低渗透砂岩露头物理模型为研究对象，进行封闭边界低渗透油藏水平井定压开采试验．并采用电子天平和高精度压力传感器实现试验数据自动采集，分析了压力分布和产量递减的特征。

Physical Simulation Research of Horizontal Well Development in Low Permeability Sandstone Reservoirs

The porous structural characteristics of natural sandstone outcropS were analyzed with conventional mercury injection method and it was compared with low permeability reservoirs. The feasibility of physical modeling by low permeability sandstone outcropsa was demonstrated, and the problem of artificial sand packed model which was hard to reach low permeability was solved. On the basis of the physical simulatio-n, an experiment was performed on closed boundary reservoir produced by constant pressure. An electronic balance and high-precision pressure sensor is used to achieve automatic data. The character of pressure distribution and production decline is analyzed.