聚合物溶液粘弹性影响因素研究

Research on Influential Factors to Viscoelasticity of Polymer Solution

通过理论与动态剪切实验研究,从聚合物分子结构及分子运动论的角度具体分析了聚合物溶液粘弹性在不同相对分子质量、浓度、矿化度、频率及温度等影响因素下的对比关系。从而得出:聚合物溶液的相对分子质量越大,浓度越高,矿化度越低,动态曲线中相应的储存模量与损耗模量也增加;粘弹性随频率的增加先增大后减小,随温度的增大而缓慢减小;聚合物溶液粘度很高时,弹性比粘性大很多,高弹性聚合物溶液能提高驱油效率。

Based on theoretical and dynamic shearing tests, the correlation of viscoelasticity of polymer solution under influential factors of different molecular weight, concentration, salinity, temperature is analyzed with respect to molecular structure of polymer and kinetic molecular theory. The results are: The storage modulus and loss modulus of dynamic curve will increase with the increase of molecular weight, the increase of concentration, and the decrease of salinity of polymer solution; With the increase of frequency, the viscoelaticity will increase and then decrease, and slowly declines with the increase of temperature; When the viscosity of polymer solution is very high, the elasticity will be much higher than viscosity. High elasticity polymer solution can improve oil displacement efficiency.