聚合物驱含水率曲线历史拟合是聚合物驱历史拟合的重点部分。在聚合物驱含水率曲线上确定 2 个重要的拟合点：聚合物驱见效点和含水下降最低点。在影响聚合物驱的众多因素中，选取聚合物溶液 相对黏度、聚合物吸附量、残余阻力系数和不可及孔隙体积作为敏感性分析的特征参数；定义敏感度系 数，通过各特征参数对各拟合点的敏感性分析，得出拟合点值随着聚合物溶液相对黏度、残余阻力系数和 不可及孔隙体积的增大而减小，随着聚合物吸附量的增大而增大；含水率曲线对聚合物驱特征参数的敏 感程度由强到弱依次为：聚合物吸附量、聚合物溶液相对黏度、不可及孔隙体积、残余阻力系数。

Water cut curve matching is the important part of the history matching of polymer flooding. There are two important fitting points in the water cut curve, which are polymer flooding effective point and water cut lowest point. In the numerous affecting polymer flooding factors, we selected relative viscosity of polymer solution, polymer adsorptive capacity, residual resistance factor and inaccessible pore volume as characteristic parameters for sensitivity analysis, and defined the sensitivity coefficient. Through sensitivity analysis, we know that the values of fitting points reduce with the increase of relative viscosity of polymer solution, residual resistance factor and inaccessible pore volume, but increase with the increase of polymer adsorptive capacity. The sensitivity of polymer flooding characteristic parameters
on water cut curve from strong to weak is: polymer adsorptive capacity, relative viscosity of polymer solution, inaccessible pore volume and residual resistance factor.