Abstract:

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. 2×104t 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.

Key words: sandstone reservoir, polymer flooding, injection-production performance, example