By comparing numerical simulation results of single-porosity and dual-porosity models, the significant effect of reinfiltration to naturally fractured reservoirs was confirmed. A new governing equation was proposed for oil drainage in a matrix block under the reinfiltration process. Utilizing inspectional analysis, a dimensionless equation suitable for scaling of recovery curves for matrix blocks under reinfiltration has been obtained. By the design of experiments, test cases with different rock and fluid properties were defined to confirm the scope of the presented equation. The defined cases were simulated using a realistic numerical simulation approach. This method can estimate the oil amount getting into the matrix block through reinfiltration, help simulate the oil drainage process in naturally fractured reservoirs accurately, and predict the recovery rate of matrix block in the early to middle periods of production. Using the defined scaling equation in the dual-porosity model can improve the accuracy of the predicted recovery rate.

通过比较单孔和双孔模型的数值模拟结果，证实了再渗透对天然裂缝性储层的显著作用。提出了一种新的控制方程，用于再渗透过程中基质块的排油。利用检验分析，获得了适合于再渗透下基质块的回收曲线比例缩放的无量纲方程。通过实验设计，定义了具有不同岩石和流体特性的测试案例，以确认所提出方程的范围。使用实际的数值模拟方法对定义的案例进行了模拟。该方法可以估算出通过再渗透进入基质区块的油量，有助于准确模拟天然裂缝性油藏的排油过程，并预测生产初期到中期的基质块采收率。在双孔隙度模型中使用定义的比例方程式可以提高预测采收率的准确性。