Abstract: In the history of water displacement curve studies,there are two kinds of methods usedup to date. One is to discuss the relations of cumulative production,cumulative water production and cumulative fluid production. The other is to discuss the relations between watercut and recovery of recoverable reserves. This later relation can be used to study differentwater cut changing pattern,various types of convex,concave and S curve on the carnationcoordinate svstem in which the recovery of recoverable reserves as obvious and the water cutas ordinate are discussed.There must exist some relations between water displacement curveand the water cut and recovery of recoverable reserves curve,but the former can only revealone type of the later curve. We define the generalized water displacement curve as:a waterdisplacement curve formula which can express many type of curves of the water cut and recovery relations simultaneously. This paper proposed a new generalized water displacementcurve formula, discusses its forms and characters.It concludes that:the direction of waterdisplacement curve research should search a rnore simple,more precise and more practicalgeneralized water drive curve formula.

Key words: water drive, curve, recoverable reserves, recovery percent of reserves

摘要： 回顾水驱特征曲线研究的历史,迄今为止的研究基本上是两个方面:①研究累积产油量、累积产水量、累积产液量之间的关系,即水驱特征曲线;②研究含水率与采出程度的关系,这一关系认为在纵座标为含水率、横座标为采出程度的图上存在凸形、S形、凹形等个同类型的曲线,以反映油田不同的含水变化规律。水驱特征曲线与含水率一采出程度关系存在联系,但前黄往往只能反映后含其中的一条曲线。一种水驱特征曲线表达式同时又能反映含水率一采出程度关系的多条曲线,我们将其称为广义水驱特征曲线。本文提出了一种文义水驱特征曲线表达式,对它的形状和性质作了一些研究,指出今后水驱特征曲线的研究方向是找出更简单、准确、实用的广义水驱特征曲线。

关键词: 水驱, 曲线, 可采储量, 采出程度