摘要
国内外学者先后提出了４０多种水驱特征曲线的表达式。由于油田开发的复杂性，使得统一的定量描述难度很大，因此各类曲线都难以描述油田开发的全过程，而只适用于某一特定的含水阶段。对于各类表达式，都应给出自变量的适用范围，使之在数学上有意义，在应用中有条件。理论研究和实践统计都表明：ＮＰ＝ｆ（ｆｗ）关系主要受油水粘度比的控制，油水粘度比不同，使水驱特征曲线呈凸型。
here are more than
40 kinds of waterdrive characteristic curves suggested by scholars home and abroad. As the
complexity of oilfield's development, it is difficult to describe them quantitatively. Any curve is
suitable only for a particular water cut period. The suitable scope of a expression must be given to
make sense in mathematics and have limitation in practical use. It is shown by theoretical
research and practical statistics that the relationship Np=f(fw) is depended mainly on the viscosity
rate of oil and water.
关键词
水驱油藏
特征曲线
驱油
reservoir, waterdrive characteristic curve, application, limitation
