A new calculation method of decline rate and its application in profile control evaluation——by taking Bohai Q oilfield as an example

It is difficult to accurately judge the effect of oil stimulation by profile control and other measures when they are implemented at the same time. Therefore, based on the B-type water drive curve, the calculation method of theoretical decline rate under the condition of constant liquid volume suitable for stable water drive stage is derived. Through the application analysis of two wells in Q oilfield, it shows that the method has good applicability, and it can be used for reference for the splitting of oil increment by profile control and by other measures.