Abstract: Based on study of previous models for production rate prediction, this paper presents a newly established differential equation of accumulated production increase rate,and works out the practicable equation used for prediction of oilfield annual production sum, accumulated production and recoverable reserve. Comparing with the Logistic's and the HU-CHEN-ZHANG's mathematic models, this model has taken into account simultaneously the influence due to time duration of development and the subground residual recoverable reserve, so it results in more compact structure of the new model and the more evident interrelation between the variables. The model could be used to match and predict the entire process of oil-gas field development, including the periods for production rate going up, peaking, and gelling down, for all development index, with its precision higher than all the other models, and can be widely recommended.

Key words: model, oil and gas field, total production, recoverable reserve, prediction, parameter