Logistic产量递减方程渗流理论基础

Percolation Theory of Logistic Production De cline Equation.

从渗流力学角度对Logistic产量递减方程进行了论证,并给出了其标准式,使得这一适用于低粘度的水驱油田的产量递减方程更具理论依据。这样,一旦确定了油相标准化相对渗透率关系式为Kro(Swd)=A+Bexp(CSwd),即可确定油田产量递减方程符合Logistic产量递减,同时也可确定其初始递减率并对产量进行趋势预测。经实例验证,该方法可行、可靠。

This paper demonstrates the equation of Logistic production decline from the angle of flow mechanism and provides its standard formula,which offer theoretical ground to production decline equation applicable to low vis-cosity water-drive oilfield.Once standardized oil phase relative permeability relationship(K ro(Swd) =A+Bexp(CS wd ))is de-fined,oilfield production decline can be judged to accord with Logistic production decline,then the initial decline rate can be confirmed and the trend will be predicted.Examples using actual field data show that the method is feasible and reliable.