弱碱型三元复合驱采出水的流变性变化规律

Variations of Rheological Behavior of Weak Alkaline Modified ASP Flooding Produced Water

通过旋转黏度计测试黏弹性和视黏度,研究了三元(碱、表面活性剂、聚合物)复合驱采出水的流变性。结果表明,三元复合驱采出水的黏弹性可用Maxwell线性黏弹性模型描述。其视黏度和黏弹性主要取决于所含聚合物的相对分子质量和含量,并且随聚合物含量的增加而增大。低聚合物含量三元复合驱采出水的视黏度和黏弹性模量之间存在着G=1．6736μ1.8155的关系式。

In this paper, the rheological behavior of weak alkaline modified ASP( alkaline, surfactant and polymer) flooding water was studied using artificial ASP flooding produced water. Viscosity and elastic modulus were tested by rotary viscometer. The results indicate that the viscosity and elastic modulus of ASP flooding produced water can be described by the Maxwell linear visco-elastic model. The molecular weight and content of polyacrylamide has remarkable influence on the viscosity and elastic modulus of ASP flooding produced water. The higher the content of polyacrylamide, the higher the viscosity and elastic modulus. A general correlation (G=1. 6736μ18155) between the viscosity and elastic modulus stands for low polymer content ASP flooding produced water.