聚合物在多孔介质中的分布和存在状态

从宏观上考察聚合物在地层的分布,微观上测定表征存在状态的各个参数,采用三管并联岩心和平板模型实验研究聚合物分布规律,通过物理模拟实验测定表征聚合物存在状态的参数,同时测定不同聚合物质量浓度下的静态吸附量和动态滞留量,采用双段塞法测定不可及孔隙体积及动态滞留量等参数,并改进实验数据的处理过程.结果表明:聚合物在纵向上主要进入高渗透层,平面上主要分布在主流线区域,两翼部分质量浓度较低；静态吸附量远大于动态滞留量,并且其比值随着聚合物质量浓度的变化而变化.

Distribution and presence state of polymer in porous media

Marco-investigation for the distribution of polymer in porous media and micro-determination for parameters of polymer presence state were done. The distribution laws of polymer were studied by using three parallel cores and the three-dimensional plate model experiments. The parameters of polymer presence state were determined by using physical simulation test, and the static adsorption and dynamic hold up at different polymer concentrations were measured. And the parameters of inaccessible pore volume and hold up were determined by double-slug experiments, and the treatment process of experimental data was improved. The results show that the polymer mainly flows into high permeability zone in vertical direction, and distributes in the main stream line area and a little in the wing area in plane. The static adsorption is larger than dynamic hold up and the ratio changes with polymer concentration.