PPG与超高相对分子质量聚合物复配技术研究

Research on the Compound Technique of PPG with Ultra High Molecular Weight Polymer

针对河南油田下二门H2Ⅳ层系油藏特征,优选出由黏弹性颗粒(PPG)和超高相对分子质量聚合物SNF6035组成的复合驱油体系,即1 500 mg/L聚合物SNF6035+1 500 mg/L 6#PPG。室内实验结果表明,聚合物SNF6035与6#PPG复配后,初始黏度基本保持不变;复配液在60℃下老化60 d后,黏度保留率大于80%,体系热稳定性较好。该复配体系可提高采收率30.25%,高于单一6#PPG或聚合物SNF6035的驱油效率。

Based on the evaluation results of viscoelastic particles of PPG（ preformed particle gel） and ultra high molecular weight polymer,No. 6 PPG and ultra high molecular weight polymer SNF6035 were screened out. The viscosity and its thermal stability and oil displacement efficiency for the compound system of PPG and ultra high molecular weight polymer were investigated through the compatibility research of polymer and PPG.The experimental results show that the initial viscosity remains unchanged after compounding of polymer SNF6035 with No. 6 PPG,and the compound solution viscosity keeps higher than 80% of its initial value after aging for 60 days at 60 ℃,which indicates better thermal stability of the compound system. Core displacement experiments proved that the ultimate oil displacement efficiency is 30. 25% for the optimized compound system formula（ 1 500 mg / L polymer SNF6035 and 1 500 mg / L No. 6 PPG）,which is higher than that of single PPG or polymer.