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提出了一种预测油气田开发指标和评价调整效果的新型增长曲线：ＮＰ＝ＮＲｍａｘｔｂｔｂ＋ａ；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，即油气田生产时间（ｔ）与相应的产量（Ｑｔ）的乘积达到最大值（ｔＱｔ）ｍａｘ时的累积产量Ｎｐ（ｔＱｔ）ｍａｘ与最大可采储量ＮＲｍａｘ的比值恒等于０５，即Ｎｐ（ｔＱｔ）ｍａｘＮＲｍａｘ≡０５，称为Ｎｐ＝ＮＲｍａｘｔｂｔｂ＋ａ型增长曲线预测油气田开发指标的０５准数。提出了根据实际资料计算ＮＲｍａｘ、ｂ、ａ等参数的方法以及应用这种增长曲线评价油气田重大调整措施效果的方法，推导了相应的计算公式。港东油田的计算实例表明了这种增长曲线实际应用的重大价值。

BY USE OF INCREASE CURVE TO PREDICT OIL AND GAS FIELD DEVELOPMENT INDEXES AND TO EVALUATE ADJUSTMENT EFFECTS

??A new increase curve of N_P=N_Rmaxt^b/t^b+a for predicting oil and gas field development indexes and evaluating adjustment effects is proposed and the calculation formulae of expressing Q_t vs t . t _m.Q _tmax and RPR (reserves-production ratio) of the increase curve are derived.The change in the relationship between Q and t of the increase curve is studied by use of graph.Through being studied an important relationship has been found,i.e. while the product of production time t and rele-vant production rate Q_t reaches the maximum (tQ_t)_max,the cumulative prodcution N_P(tQ_t)_max-maximun recoverable reserves N_Rmax ratio is identically equal to 0.5,i.e. N_P(tQ_t)_max/N_Rmax??0.5,which is called 0.5 criterion for predicting oil and gas development indexes by the N_P=N_Rmaxt^b/t^b+a mould increase curve. The methods for calculating the parameters as N_Rmax, b and a ,etc.,according to actual data and those for evaluating the effects of oil and gas field important adjustment measures by the increase curve are proposed and the relevant formulae are derived.By taking the Gangdong oil field as an example,through calculation it is shown that such an increase curve is of an important value in practical application.