聚合物溶液的弹性对驱油效率贡献的定量描述

Quantitative description of contribution of elasticity of polymer solution to oil displacement efficiency

通过可视化微观驱油实验研究不同质量浓度聚合物溶液和不同黏度甘油溶液驱替水驱后各类残余油的驱油效率,对比分析聚合物溶液的弹性对驱油效率的贡献。结果表明:在相同的黏度条件下,聚合物驱对盲端类、膜状类、斑状类和簇类残余油的驱油效率高于甘油驱的驱油效率,其驱油效率的差值是聚合物溶液弹性的贡献;对盲端类、膜状类、斑状类和簇类残余油,随聚合物溶液质量浓度的增加,驱油效率增加,弹性对驱油效率的贡献约为40%。

According to the visual micro-flooding experiment, the oil displacement efficiency of the polymer solution with dif- ferent mass concentration and the glycerin solution with different viscosity flooding and different types of residual oil after water flooding were studied, and the contribution of elasticity of polymer solution to displacement efficiency was contrasted and analyzed. The results show that with the same viscosity, the oil displacement efficiency of polymer solution is higher than that of glycerin solution on the dead ends residual oil, filmed residual oil, mottled and cluster residual oil. The differentials of the oil displacement efficiency are resulted from the elasticity of the polymer solution. With the mass concentration of polymer solution increasing, the oil displacement efficiency increases, and the contribution of elasticity of polymer solution is about 40%