利用水驱特征曲线确定活塞式驱程度指数的方法

在分析研究甲、乙、丙、丁型水驱特征曲线的基础上，提出了两类水驱特征曲线，这两类曲线不仅可应用于水驱开发油田可采储量和采收率的预测，而且也可以确定活塞式驱程度指数。研究表明，当活塞式驱程度指数越接近于1，表明活塞式越明显；当活塞式驱程度指数越接近于0，表明活塞式越不明显。

Using Water Drive Curves for Determination of Piston Displacement Degree Index

On the basis of analyzed A, B, C, D-type water drive curves, two categories of water drive curves are proposed, which can not only be applied to predict recoverable reserves and recovery factor in a watemooding oilfield,but can determine piston displacement degree indexes. The study shows that the more close to 1 the degree indexes, the more obvious the piston displacement is; whereas the more close to 0, the less obvious the piston displacement.