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Prediction method for development index of polymer flooding

LIU Yi-kun1,BI Yong-bin1,SUI Xin-guang2 (1.Daqing Petroleum Institute,Daqing 163318,China;2.No.1 Oil Production Company of Daqing Oilfield Company Ltd.,Daqing 163111,China)  
At present,in the process of predicting development index of polymer flooding,the method of "calculating water cut with fixed rate of fluid"is used widely,however,fluid production is not invariable in practice.In this paper,generalized Weng's prediction model and arc tangent function prediction model are applied in development index prediction to predict oil production and water cut respectively,and then predict development indexes including fluid production,water production,cumulative oil production,cumulative fluid production and cumulative water production.This method overcomes the limitation of the method of "calculating water cut with fixed rate of fluid".The polymer flooding industrialized block in western Bei 1-2 well row of Daqing Oilfield is predicted using this method in the paper.Result shows that,prediction accuracy can satisfy field requirements and have a certain application value.
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