阳离子聚合物对聚合物驱含油污水的处理研究

Research of Cationic Polymer on Oily Sewage Treatment in Polymer Flooding Oilfield

朱玥珺张健段明

ZHU Yue-Jun ZHANG Jian DUAN Ming

利用zeta电位、浊度、粒径、滤过时间等参数，考察了阳离子聚合物浓度、阳离子度和分子结构对聚驱油田含油污水处理效果的影响。结果表明：少量阳离子聚合物即使不合聚污水油滴zeta电位反转并稳定分散；残留的驱油用聚合物有助于油滴在污水中的稳定分散；处理后含聚污水的zeta电位、粒径增加幅度和浊度随阳离子聚合物用量、阳离子度的增大而减小；阳离子度≥15％的聚合物最佳用量随聚合物阳离子度增加而减小；交联型比线型阳离子聚合物具有更好的除油效果，处理后污水滤过时间更短。图5参8

The effects of cationic polymer concentration,cationic degree,and molecular structure on oily sewage treatment in the polymer flooding oilfield were investigated by the measurement of zeta potential,turbidity,particle size,filtration time,etc..The results showed that zeta potential of sewage without HPAM residue was reversed by addition of small amount of cationic polymer,and the oil droplets possessed stable dispersion.HPAM as EOR residue was beneficial to the stable dispersion of oil droplets in sewage.After treated with cationic polymer,zeta potential,increasing extent of particle size and turbidity of sewage with HPAM residue decreased with the increase of the cationic polymer dosage and cationic degree.The optimum dosage of cationic polymer with cationic degree ≥15%,decreased with the increase of the cationic degree.The degreasing efficiency of cross-linked polymer was better than that of linear polymer.After treated with cross-linked polymer,the filtration time of sewage with HPAM residue was shorter.