通过聚合物水溶液流经滤膜的流出曲线计算不溶凝胶含量的方法

Computing Method of the Insoluble Gel Content by the Flow Curve of the Polymer Aqueous Solution Through the Porous Membrane

本文对聚合物水溶液在通过多孔滤膜时的流动行为进行了数学分析,进而建立了一套在恒压模式下聚合物溶液通过多孔滤膜时的流动曲线分析方法,得到了聚合物水溶液中≥滤膜微孔可封堵尺度的不溶凝胶含量,可以有效评价聚合物溶液的溶解性和均匀性。与传统的过滤因子测试方法相比,该方法获得的参数与溶液的均匀性和滤膜孔径相关,排除了其他测量条件的影响,同时有更高效的测试效率。对于三次采油中大量使用的驱油剂聚丙烯酰胺,本文设计的方法能有效评价其中不溶凝胶含量。通过该方法计算也可以得到过滤因子与对应的不溶凝胶含量的关系曲线,计算发现,驱油剂用聚丙烯酰胺的通用行业标准中的过滤因子1.5对应溶液中的不溶凝胶含量应在0.4%左右。

The flow behaviors of polymer aqueous solutions containing the insoluble gel were analyzed during going through the porous membranes. The flow curve analytical method was founded and the parameter of the insoluble gel content in polymer aqueous solution was used as an effective evaluation method to the solubility and the homogeneity of the polymer solution. Contrast to the existing method,the method was more efficient and more suitable,furthermore,the result via this method only depended on the homogeneity of the solution and the pore size of the porous membrane,the other factors in the test was unrelated. As for the polyacrylamide which was widely used in enhancment of oil recovery,the method could provide the value of the polymer insoluble gel content efficiently. The relation curve of filter factor and insoluble gel content were also found by the calculation,and it was found that while the filter factor of PAM was 1.5,the insoluble gel content of PAM was approximately 0.4%.