水解作用对AM/AMPS共聚物渗流特性的影响

Effect of Hydrolysis on Percolation Characteristics of AM/AMPS Copolymer

选用抗温抗盐AM/AMPS共聚物,并且适当的水解研究其在高矿化度下的表观黏度、流动阻力和驱油效率。实验结果表明,随着共聚物水解度的增加,质量浓度为2000 mg/L的聚合物溶液黏度逐渐降低,并且对其阻力系数和驱油效率影响较大。与未水解的共聚物相比,水解度为55%时,黏度损失率超过40%,阻力系数损失率超过60%,驱油效率减小14.29%。在高矿化度下,与HPAM溶液相比,不同水解度的共聚物具有更高的表观黏度、流动阻力和驱油效率。

The aqueous solution of acrylamide polymer will accelerate its hydrolysis under high temperature and high salinity,and its solution properties will change.Therefore,the anti-temperature and salt-resistant AM/AMPS copolymers were selected,and proper hydrolysis studies its apparent viscosity,flow resistance and oil displacement efficiency at high salinity.The experimental results show that with the increase of the degree of hydrolysis of the copolymer,the viscosity of the polymer solution gradually decrease,and its resistance coefficient and oil displacement efficiency are greatly affected.Compared with the unhydrolyzed copolymer,when the degree of hydrolysis is 55%,the viscosity loss rate exceeds 40%,the drag coefficient loss rate exceeds 60%,and the oil displacement efficiency decreases by 14.29%.At high salinities,copolymers of different degrees of hydrolysis have higher apparent viscosity,flow resistance and oil displacement efficiency than HPAM solutions.