Abstract: b^tt^c factor growth curve, a new kind of quasi-generalized growth curve,which can be used to predict indexes of oilfield development,was proposed. The studies show that the ratio of cumulative production and maximum recoverable reserves corresponding to maximum production is ranged from 0 to 1.0 for this growth curve. The end section of the relationship of Q_t vs. N_p, can be concave upward or downward, and the relationship of both Q_t vs.t and N_p vs.t has the analytical expression respectively. The repeated duality regression method obtaining the parameters of this growth curve was presented. An example from Qingzuji oilfield shows that this growth curve has a greater value for application.

Key words: prediction, development index, oilfield, curve