New prediction model on production performance for polymer flooding

To establish an effective production prediction model for polymer flooding, the characteristics and applicability of four typical prediction models in polymer flooding were analyzed, including Weibull model, generalized Weng's model, Rayleigh model and HCZ model. On the basis of analyzing influential factors on polymer flooding production, several parameters were put into a new prediction model, such as polymer injection volume, development time and polymer concentration. The new model was used to predict the oil production of four polymer-flooding blocks in Daqing Oilfield successfully. The results show: All the coefficients of correlation between the actual production curves and the predicted curves were higher than 0.985; and the errors of predicted production peaks and corresponding polymer injection volumes were less than 3%. The prediction is reliable and the model is applicable to analyze the effect of polymer injection volume, polymer concentration and injection speed, etc. on the production in polymer flooding. Only a few parameters are required, and it is easy to calculate and use.EI02228-2313