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聚合物溶液在通过孔隙介质时产生的剪切降解作用与流速有关 ,流速越大 ,剪切降解越严重。流经孔隙介质后的聚合物溶液的阻力系数和残余阻力系数明显低于原始聚合物溶液 ,交联效果也明显差于原始聚合物 ,产生弱交联需要更高的聚合物浓度和交联剂浓度。因此在室内评价调剖剂性能时 ,应考察在一定流速下流经孔隙介质后的聚合物的交联情况。同时也说明 ,聚合物驱产出液中的聚合物在一定条件下可以通过弱交联技术实现增粘回注。
The shear degradation of the polymer solution as it passes through the pore medium is related to the flow rate. The greater the flow rate, the more severe the shear degradation. The drag coefficient and the residual drag coefficient of the polymer solution flowing through the pore medium were significantly lower than those of the original polymer solution, and the cross-linking effect was also significantly worse than that of the original polymer. The production of weak cross-linking required a higher polymer concentration and the cross-linking agent concentration. Therefore, when evaluating the performance of profile control agent indoors, the cross-linking of the polymer after flowing through the pore medium at a certain flow rate should be investigated. At the same time, it also shows that under certain conditions, the polymer in the polymer flooding solution can be visbroken via weak cross-linking technology.