Study on adaptability of polymer microspheres to deep regulation and flooding in low permeability reservoir
Polymer microspheres are widely used as a deep profile control agent to improve water drive recovery in low permeability oil fields.Taking Changqing X46 test block as the research object,the oil increase and recover-able reserves were predicted,and the adaptability of polymer microsphere deep regulation and flooding in low permeability reservoir was analyzed in combination with key injection parameters.The influencing factors of polymer microsphere profile regulation effect were drawn to determine the optimal profile regulation parameters,and the correctness of the conclusions of test X46 block was verified with flow line simulation software.The results show that 0.50%microsphere concentration is recommended in the test area,and the injection amount is controlled in the range of 1 500～2 000 m3.The particle size of the microspheres should be set at 100 nm,and the best injection time should ensure that the water content is maintained between 40%and 70%.This study can provide some guid-ance and reference for the deep profile control measures of this oilfield and the development adjustment of similar oilfields in the late period of high water cut.
万方数据
维普
