聚合物驱相对渗透率计算的微观模拟研究

聚驱相对渗透率曲线是油田聚驱开发指标计算和预测的重要资料。文中建立了基于油水两相流的三维准静态孔隙网络模型，模拟了以Carreau 模型为基础的黏弹性聚合物驱微观渗流过程。用孔隙网络模型模拟了水驱、聚驱的渗流过程，得到了水驱和聚驱的相对渗透率曲线，计算结果与实验结果的变化趋势相吻合，验证了采用孔隙网络模型预测聚驱相对渗透率曲线的有效性。结果表明：孔隙网络模型能充分体现毛管压力的作用，在相同水饱和度下，聚合物驱的相对渗透率低于常规油/水的水相相对渗透率，聚合物驱残余油饱和度比常规水驱低，说明采用孔隙网络模型模拟聚驱相对渗透率曲线具有可行性。

Microscopic simulation of relative permeability curves in polymer flooding

The relative permeability curve in polymer flooding is the important data for forecasting development indicators.A three-dimensional and quasi-static network model is established based on the percolation theory.Based on Carreau model,viscoelastic polymer microscopic seepage mechanism is simulated.Water flooding and polymer flooding seepage mechanism are simulated by using pore network model,and the relative permeability curves are obtained.The calculated result coincides with the experimental results.The re...