驱油用聚合物溶液的拉伸流变性能

Extensional rheological properties of polymer solution for oil driving

测试不同类型聚合物在不同质量浓度、不同盐度条件下拉伸流变性能.结果表明:随着聚合物溶液质量浓度的增大其拉伸黏度也增大,随着溶液中NaCl盐度增加而拉伸黏度减小,但不同类型聚合物拉伸黏度受质量浓度和盐度影响的强弱不同.通过对聚合物拉伸流变性能的测试,可以分析溶液中聚合物分子的存在状态及作用机理,进而指导油田用聚合物的筛选、质量控制及配方设计等;聚合物溶液在长细管岩心中的渗流运移规律明显不同,拉伸流变性能对于聚合物溶液在地层中的渗流运移特性起重要作用.

Extensional rheological properties of two type polymer solution were studied in different concentration and in different salinity.The higher the polymers concentration,the higher extensional viscosity of polymers;the higher the NaCl solution concentration,the lower extensional viscosity,but the effect of concentration and salinity on the extensional viscosity was very different for different polymers.As a result,by studying on extensional rheological properties of polymer solution,we can conjecture polymer molecular form and action mechanism each other in water.At the same time,it can guide such activities as polymer choosing,quality controlling,and technique designing.The characteristics of seepage flow and migration were studied in long tubule core for different polymers.Result showed that the characteristics of seepage flow and migration was very different for two different type polymers.All this proved that the extensional rheological properties of polymer solution is very important for chemical flooding.