【摘要】 聚合物溶液的粘度主要受其相对分子质量和溶液浓度的影响．聚合物的相对分子质量愈大，配制成相同粘度的聚合物溶液所需浓度愈小．在相同浓度条件下，聚合物溶液的粘度愈大，其驱油效率越高．而在等粘条件下，不同相对分子质量聚合物的驱油效果相同．在剪切速率和岩石渗透率相同条件下，聚合物相对分子质量愈大，溶液的粘度损失愈大；较高相对分子质量聚合物溶液的剩余粘度仍然比较低的大．在大庆油田聚合物驱过程中，选择聚合物相对分子质量的最佳范围应在１０×１０６～１７×１０６之间．更多还原

【Abstract】 The viscosity of polymer solution is mainly affected by the relative molecular weight of polymer and concentration of the solution. The higher the relative molecular weight, the lower the concentration for the same viscosity. By the same concentration, the higher the viscosity, the better the sweep efficiency. By the same viscosity, different relative molecular weight have the same sweep efficiency. By the same shear velocity and permeability, the higher the relative molecular weight, the highr the viscosity loss. With the research, it is feasible for polymer flooding in Daqing oil field to select polymer molecular weight between 10.0×10 6 and 17.0×10 6更多还原