摘要：

油田回注水中含有大量S^2-,其会降低聚合物——部分水解聚丙烯酰胺(HPAM)的黏度,进而影响驱油效果.采用化学氧化法去除油田污水中的S^2-,探讨了KMnO₄、H₂O₂和NaClO对S^2-的去除效果,考察了油田污水中S^2-经氧化去除后聚合物黏度的恢复情况.实验结果表明,3种氧化剂均能有效去除油田污水中的S^2-,提高聚合物黏度.经过安全性、方便性、性价比的对比,发现KMnO₄既能快速有效地去除S^2-,改善聚合物黏度,且使用方便,价格合理,是最优氧化剂.

关键词: 硫离子, 聚合物黏度, 氧化法

Abstract:

Oilfield reinjection water consists of a great deal of S^2-,which can reduce the viscosity of polymer-partial hydrolyzed polyacrylamide(HPAM),and furthermore,affect oil production effect. Chemical oxidation method has been used for the removal of S2from oilfield wastewater. The removing effect of KMnO₄,H₂O₂ and NaClO on the S2are discussed. After S2has been removed from the oilfield wastewater by oxidation method,the restoring state of polymer viscosity is investigated. The experimental results show that all of the three kinds of oxidants can effectively remove S2from oilfield wastewater,and improve the polymer viscosity. Based on the contrasts of security,convenience and price-performance ratio,it is found that KMnO₄ not only can rapidly and effectively remove S^2-,and increase the polymer viscosity,but also can be used conveniently,and has reasonable price-performance ratio. Therefore,it is the best oxidant.

Key words: sulfur ions, viscosity of polymer, oxidation method

中图分类号: 

• TE357

• X703.1