聚合物流变性实验研究

The Experimental Study on Rheological Behavior of Polymer

聚合物流变性是聚合物驱油设计理论基础,应用DVⅢ旋转粘度计对聚合物流变性进行了系统研究。结果表明,聚合物溶液呈现剪切变稀特性,表观粘度是剪切速率、温度、质量浓度的函数,同一温度下稠度系数随着质量浓度的增加而增加,幂律指数随着质量浓度的增加而减小,建立了描述聚合物溶液宏观流变性流变模型,引进支持向量机的方法对聚合物的流变性进行预测,预测结果与实际测量结果相一致,为聚合物驱数值模拟、油藏动态预测和矿场工程设计提供了重要的依据。

As theoretical foundation of polymer flooding design, the polymer rheological behavior is systematically studied by using DVⅢ rotational viscometer. The result shows that polymer solution appears shear-thinning behavior and apparent viscosity is the function of shear rate, temperature and concentration of polymer, and at the same temperature, the consistency coefficient is increasing with the concentration increase, the power-law index is decreasing with the concentration increase. Through development of rheological model and introduction of support vector machine method, the prediction of the rheological behavior of polymer is conducted, showing consistent results between prediction and measurement. This provides base for polymer flooding numerical simulation, reservoir performance prediction and field engineering design.