油田污水处理技术现状和新进展

Status and progress of oilfield wastewater treatment technology

随着国内石油开采程度的不断提高,油田相继进入了高含水开采期。一些油田开采后期,采出水的综合含水率达到90%以上。因此,油田污水处理越来越备受关注。回注水成为注水的主要水源,而采出液含水率上升,外排水量也不断增加。本文就处理后的水质,即回注水的悬浮物颗粒大小、浓度、含油量及COD,综述了各项回注水和外排水处理技术的优势和不足,将其进行技术组合后,可提高采油污水的处理效果,提出了油田污水处理的发展趋势。

As the level of domestic oil production rising oil fields have entered a period of high water-cut.Some post-oil extraction,water cut rate has raised 90%.Therefore,the oil field wastewater treatment more and more cause for concern.Recirculated water become a major source of water injection,while the increase in water-cut produced fluid,external displacement is also increasing.In this paper,the treated water,the suspended solids particle size,concentration,oil content and COD of recirculated water,an overview of the injection water and the outer drainage treatment technology strengths and weaknesses,its technical combination,can increase the treatment effect of production wastewater.it put forward the development trend of oil field wastewater treatment.