聚丙烯酰胺溶液的黏弹性及影响因素

Viscoelasticity and factors of polymer solution

针对威森伯格数与聚合物溶液质量浓度和矿化度的对应关系不明确问题,利用HAAKE RS150流变仪,通过稳态和动态剪切实验,研究低剪切速率下聚合物溶液的质量浓度、矿化度对其黏弹性的影响,计算第一法向应力差和威森伯格数.结果表明:聚合物溶液质量浓度越大,矿化度越低,第一法向应力差和威森伯格数越大,黏弹性越强;油田用普通聚合物溶液在剪切速率为10 s-1,地层水矿化度为508 mg/L时,威森伯格数约为1.

Aimed at the problem that the corresponding relation between Weissenberg number and mass concentration and salinity of polymer solution is not clear,HAAKE RS150 rheometer is used and through steady and dynamic shear experiments,the effects of mass concentration and salinity on the viscoelasticity of polymer solution in low shear rate have been discussed,and the first normal-stress difference and Weissenberg number are calculated.The results show that with the increase of the mass concentration of polymer solution and the decrease of salinity,the first normal-stress difference and Weissenberg number increase,the viscoelasticity of polymer solution increases.Weissenberg number of ordinary polymer solution used in the oilfield is about 1 in the condition of shear rate is 10 s-1 and the salinity is 508 mg/L.