聚丙烯酰胺压裂液流变行为影响因素研究

Study on the rheology behaviors of polyacrylamide fracturing fluid influence factors

摘要:

本文通过考察聚丙烯酰胺（PAM）压裂液使用浓度，温度，pH及金属离子研究了聚丙烯酰胺压裂液的黏度.。结果表明,增加PAM使用浓度，压裂液黏度上升，非牛顿性增强，1.0%PAM压裂液黏度可达到施工要求.温度上升，压裂液黏度下降，非牛顿性减弱.改变PAM压裂液的pH环境也可造成黏度下降，金属离子对PAM黏度影响从大到小顺序为依次为Mg2+>Ca2+>Na+>K+，符合扩散电层理论.静态悬砂试验表明，聚丙烯酰胺压裂液在浓度为1.0%及60℃时，悬砂时间达14.88cm.min-1,能满足压裂液携砂标准.

Abstract:

The viscosity behaviors of polyacrylamide fracturing fluid had been studiede through investigating the concentration，temperature，pH and metallic ion .The results showed that,when increased the PAM concentration, the fracturing fluid viscosity increased, non-Newtonian viscosity enhanced and the viscosity of fracturing fluid could meet the construction requirements when the concentration was 1.0%. increased the temperature could decrease the fracturing fluid viscosity and weaken non-Newtonian. Change the PAM fracturing fluid pH environment also could decrease the viscosity. Metal ions could decrease the viscosity of fracturing fluid, the effect of metal ions on PAM viscosity order was Mg2+>Ca2+>Na+>K+, consisted with diffusion layer theory. The static suspension experiments showed that when the PAM concentration of 1% and 60 ℃,,the proppant-carrying time reached 16.58min/cm,,could meet the fracturing fluid carrying sand standards.