河南油田MD膜剂与聚合物复配技术提高采收率实验研究

介绍了聚合物和MD（分子沉积）膜剂筛选方法和主要指标，考察了MD膜剂与聚合物复配液对体系粘度、稳定性及驱油率的影响。结果表明，聚合物HPAM1与MD-3膜剂常温复配后粘度基本保持不变；聚合物HPAM1浓度1700mg／L与MD-3膜剂浓度1000mg／L复配液经85℃老化90d后，复配液体系粘度仍达58．1mPa·s，说明体系热稳定性好；MD-3膜剂浓度1000mg／L与聚合物HPAM1浓度1700mg／L复配液室内岩芯驱油实验结果表明，驱油率达到22．6％，高于相同浓度单纯MD-3膜剂驱、单纯聚合物HPAM1驱及其他复配浓度的驱油效率。

Laboratory Study on MD Film/Polymer Composite for Increasing Oil Recovery in Henan Oilfield

The screening methods of polymers and molecular deposition （MD） films were introduced. Their indexes were given in this paper. The influences of different polymer/MD film composites on the system vis- cosity, the thermal stability and the oil displacement efficiency were examined. The result showed that the （HPAM1/MD- 3 film） composite had no negative effect on the system viscosity. It was discovered that the most suitable concentrations for HPAM1 and MD -3 film were 1 700 mg/L and 1 000 mg/L respectively. The viscosity of the above composite at 85 ℃ was 58.1 mPa. s after aging 90 days, which showed that the above composite had excellent thermal stability. According to the results of oil - drive lab test for reservoir core, the oil displacement efficiency of the above composite was as high as 22.6%, which obviously higher than HPAM1 or MD -3 system, or HPAM1/MD -3 film composites with other different concentrations.