一种新型增长曲线预测油田开发指标方法

A New Increase Curve To Predict Indexes Of Oilfield Development

提出了一种预测油田开发指标的新型的增长曲线，推导了这种增长曲线的Qt～t、tm、Qtmax以及RPR的计算公式。用图形研究了这种增长曲线的Qt～t关系的变化特点。根据研究发现了一个重要的关系，即油田生产时间t与相应的产量Qt的乘积达到最大值（tQt）max时的累积产油量Np（tQt）max与最大可采储量NRmax的比值恒等于0．64792，称为Np＝型增长曲线预测油田开发指标的0.5准数。提出了根据实际资料计算NRmax、b、a等参数的方法。计算实例表明这种增长曲线在实际应用中具有重大价值。

A new increase curve mould to predict indexes of oilfield development has been proposed and formulas of production Qt - t (time), maximum production Qtmax, time according Qtmax and reserve - production - ratio RPR of the increase curve have been derived. By using the drawing the characteristics of Qt - t relationships of the increase curve have been studied. In terme of the researches an important relationship has been found: when product of production t (time) and according production Qt reaches maximum value (tQt)max,the proportionality of cumulative production Np(tQt)max and muximum recoverable reserves NRmax identically equal to 0. 647 92, it is called 0. 647 92 criterion of the increase curve of N. mould to predict indexes of oilfield development. The methods for calculating NRmax, b and a by using actual data have been proposed. An example for calculation of Mafang oilfield shows great useful value of the increase curve.