聚合物驱相对渗透率曲线的特征研究①

本文在研究聚合物溶液流经多孔介质时的流变性基础上,确定了聚合物溶液在多孔介质的有效粘度与分流量和相饱和度之间的关系式。从而解决了聚合物吸附/滞留及非牛顿流效应的影响,建立了稳定法测定聚合物驱相对渗透率曲线的实验技术和方法。成功地测得了油/聚合物溶液体系的相渗曲线和注聚合物段塞后的油/水体系的相渗曲线,并确定了适当的相渗曲线经验方程。讨论了聚合物驱相渗曲线的特征,分析了水相中的自由聚合物分子和岩石中吸附/滞留的聚合物对相渗曲线的影响,真实地反映了聚合物驱过程中的多相渗流规律。

Determination Method of Polymer Flooding Relative Permeability Curves

On the basis of experimental study of the in-situ rheology of the polymer solution through porous media, this paper obtains an effective viscosity dependence of polymer so-lution upon phase saturation and fractional flow rate. Thus the experimental technique an method to determine the polymer flooding relative permeability curves are developed by steady-state method and the relative permeability curves for oil/polymer solution systemand for oil/water system after the polymer is slugged , are successfully measured, and the relevant emprical equations are also selected. in this paper, The characteristics of the rela-tive permeability curves for polymer flooding is discussed, and the effect of free polymer molecules in water phase and the polymer absorbed and retained in the rocks on the rela-tive permeability curces is analyzed, revealing the law of multiphase flow during polymer flooding.