典型水驱曲线含水上升率表达式研究

Research on the Expression of Water Cut Escalating Rate of Typical Water Drive Curve

长期以来,水驱曲线类型的合理选取主要依靠含水率与采出程度关系曲线上历史数据点与拟合数据段的匹配程度进行判断,判定方法较为单一,因此有必要研究新的水驱曲线类型选取方法以进行相互佐证。基于甲、乙、丙、丁四种典型水驱曲线公式推导出含水上升率与采出程度的关系表达式,发现其在含水上升率分布图上具有不同的分布特征,可作为水驱曲线类型的选取依据。新的水驱曲线类型选取方法与原方法判定结果一致,表明该方法是可靠的。

For a long time,how to select a reasonable water drive curve type mainly depends on the matching degree of the historical data point and the fitting data section on the relationship between the water cut and the recovery. The determination method is single,so it is necessary to study the new method of selecting the type of water drive curve. Based on the formula of four typical water drive curve formulas of A,B,C and D,this paper derives the expression of the relation between the rising rate of water cut and the recovery. It is found that it has different distribution characteristics on the plate,which can be used as the basis for selecting the type of water drive curve. The new method is consistent with the result of the original method,indicating that the method is reliable.