聚合物溶液的黏弹性对残余油膜的作用

Efffect of viscoelastisity of HPAM solution on residual oil film

从微观驱油实验和理论出发,研究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简化收缩流道中的残余油膜的驱油效率,分析黏弹性的HPAM溶液和甘油溶液对残余油膜的作用效果,给出HPAM溶液的弹性与残余油膜厚度的关系.研究结果表明:在相同黏度条件下,HPAM溶液驱后的残余油膜厚度比甘油溶液的小,聚合物溶液对油膜的驱替效率比甘油溶液的大;随溶液弹性的增强,对油膜的驱替效率增大,残余油膜的厚度减少;聚合物溶液的弹性改变了聚合物溶液在孔道中的受力状态,增加了凸角内流体的流速,对油膜的作用增强,增加了携带能力,提高了微观驱油效率.

Based on the micro-oil displacement experiment and theory research,the oil displacement efficiency of polymer solutions and glycerin solution on residual oil film at simplified contraction channels is studied and the mechanism of oil displacement of viscoelastisity of polymer solution on residual oil film is quantitatively analyzed.The results of investigation indicate that the thickness of residual oil film after polymer flooding is smaller than that of glycerin solution in the same viscosity,the oil displacement efficiency of polymer solution on residual oil film is bigger than that of glycerin solution.The oil displacement efficiency increases with the elasticity of polymer solution enhancing on residual oil film,the thickness of residual oil film reduces.