三元复合驱采出水处理研究进展

随着三元复合驱采油技术在油田的广泛应用，三元复合驱采出水产量不断增加。三元复合驱采出水水质复杂，具有矿化度高、黏度大、含油乳化程度高、小油滴含量高、油水分离困难等特点，对油田生产和环境的影响日益严重。因此，开展三元复合驱采出水高效处理方法的研究成为一项重要的任务。本文分析了影响三元复合驱采出水油水分离特性的各种因素，介绍了目前国内应用于三元采出水处理的先进技术，如膜分离法、气浮选分离法、高级氧化法、微生物法等，阐述了这些处理技术的优势及存在的问题，重点介绍了气浮选分离法和微生物法在三元采出水处理中的应用情况，并对大庆油田三元复合驱采出水现场处理工艺进行了介绍，最后对今后的研究工作提出了一些展望。

Research progress on treatment technologies of alkali/surfactant/polymer flooding produced water

With the wide application of alkali/surfactant/polymer (ASP) flooding oil recovery technology in oilfield, the yield of ASP flooding produced water is increasing. The characteristics of ASP flooding produced water is complex, which include high salinity, high viscosity, high oil emulsification, high content of small oil droplets and difficult separation of oil from water, resulting in an increasing negative impact on oilfield production and the environment. Therefore, it is important to study the efficient treatment technologies of ASP flooding produced water. This study analyzed the factors that affect the oil-water separation characteristics of ASP flooding produced water. The advanced technologies for ASP flooding produced water treatment in China, such as membrane separation, air flotation separation, advanced oxidation method, and microbiological method, etc. were introduced. The advantages and problems of various treatment technologies were described. The application situation of air flotation separation and microbiological method in ASP flooding produced water treatment was emphatically introduced. The treatment technologies of ASP flooding produced water in Daqing oilfield were introduced. Finally, some prospects were put forward for future researches.