EARLY-STAGE INJECTION-PRODUCTION PERFORMANCE OF POLYMER FLOODING AND EFFECT ANALYSIS: FEIYANTAN OILFIELD

The area within Feiyantan oilfield was under polymer injection when the total water cut reached 86.1%. As such the area claims the lowest water cut among all the areas put into polymer injection in Shengli oilfield so far. A good effect of increased oil production and decreased water cut appears after the polymer flooding has been carried out over one year. Oil production increases from 652?t/d to 758?t/d, while total water cut decreases from 86.1% to 79.9%. And a cumulative incremental production of 2.2×10 4?t has been obtained. Currently the character of early stage flooding production performance is apparent. The practiceand research show that the important measures to improve polymer flooding effect in the coming years should be differential management of the injection production wells, and a balanced recovery of liquids from the wells.