网络出版日期: 2011-06-20
Microscopic simulation of relative permeability curves in polymer flooding
Online published: 2011-06-20
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。
张涛 , 张拭颖 . 聚合物驱相对渗透率计算的微观模拟研究[J]. 岩性油气藏, 2011 , 23(3) : 119 -123 . DOI: 10.3969/j.issn.1673-8926.2011.03.023
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 mechanismis 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 result shows that pore network model can display the influence of capillary pressure. The relative permeability of polymer is lower than that of water phase in conventional oil/water flooding at the same water saturation, and residual oil saturation after polymer flooding is lower than water flooding. The model result indicates that pore network model can be used to simulate the relative permeability curve in polymer flooding.
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