聚合物溶液的弹性效应对驱油效率的作用

The effect of elastic behavior of HPAM solution on displacement efficiency

从微观驱油实验出发,研究了系列质量浓度的黏弹性聚合物(HPAM)溶液和系列黏度的甘油溶液对斑状润湿条件下的残余油的驱油效率,分析了黏弹性的HPAM溶液和甘油溶液对残余油的作用,给出了HPAM溶液的弹性与驱油效率的关系.研究结果表明:在相同黏度条件下,HPAM溶液的驱油效率高于甘油溶液的驱油效率;HPAM溶液的弹性可以提高驱油效率,在该实验条件下,HPAM溶液弹性作用的最佳质量浓度为1.0～2.0g/L.

In this paper, the rheological characteristic of HPAM solutions is studied and the oil displacement efficiency of viscous-elastic HPAM solutions (mass concentration in series) and viscous glycerin solutions (no elasticity, viscosity in series) are calculated by flooding at visual microscopic glass models. Also, the effect and mechanism of the elastic behavior of HPAM solutions and glycerin solution on the displacement of residual oil films under mixed wettability conditions are studied, the relationship between the elastic behavior of HPAM and oil displacement efficiencies are given in the experiment condition. It is indicated that the oil displacement efficiency of polymer solution is higher than that of glycerin solution at the same viscosity. The elastic behavior of polymer solution can increase the displacement oil efficiency. At the experiment condition, the optimum range of concentration of polymer solution is 1.0～2.0 g/L for higher displacement oil efficiency.