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通过室内物理模拟方法，利用岩心流动实验装置，研究了不同分子量、浓度的聚合物溶液通过不同渗透率的多孔介质流变特性。实验结果显示聚丙烯酰胺溶液在多孔介质中呈现剪切变稀主剪切增稠的双重流变特性，其临界流速随分子量、浓度的增加而减小，随渗透率增大而增大。在剪切增稠区，流变性满足幂律模型，而且流变行为指数仅仅是聚合物本身性质参数的函数，而与渗透率无关。这一结果认为在聚合物驱的注入井附近地带将导致附加压降，影响聚合物的注入性能。
Through the laboratory physical simulation method, the rheological properties of porous media with different molecular weight and concentration of polymer solution passing through different permeability were studied by using the core flow experimental device. The experimental results show that the polyacrylamide solution has the dual rheological properties of shear thinning and shear thinning in porous media. The critical flow rate decreases with the increase of molecular weight and concentration, and increases with the increase of permeability. In the shear thickening zone, the rheology meets the power-law model, and the rheological behavior index is only a function of the polymer’s own properties, independent of permeability. This result suggests that a zone near the polymer-driven injection well will result in an additional pressure drop that affects the injection properties of the polymer.