Abstract: Prediction of production rate and reserves is a very important task during oil-gas field development. Weibull model for prediction of oil-gas field production rate is presented, including the basic correlations and its property. Dual linear simulation method for solving the model parameters is proposed. The practicability and validity of this model is verified by case study. Also, it is recognized that Weibull model is a generalized Wengcycle model in fact. This model not only adapts to the variation of oil-gas field production rate with single peak, but also to the declining case of oil-gas field production rate.

Key words: model, prediction, oil-gas field, production rate