摘要
河南双河油田高含水开发后期采用聚合物驱采油技术,以及二级沉降+二级过滤的污水处理工艺。然而,由于污水水质发生变化,污水的小粒径油珠乳化现象严重,致使二级沉降效果变差。为此,制定了整改方案:集配水系统采用喇叭口集配水,而且增加喇叭口数量来满足控制面积的要求;在沉降罐外增加混凝罐;对二级3#3 000 m3沉降罐内部结构进行改造。整改方案实施后,二级3#沉降罐出口污水含油质量浓度在50 mg/L以下,符合后续过滤系统对水质的要求。
Shuanghe Oilfield of Henan adopts polymer flooding technology to produce oil at the high
water cut later stage of development,with the sewage process of ＂secondary settling ＋ secondary filtration＂.
However,because of the water quality change of the sewage,the emulsion phenomenon of the
small- particle- size oil droplets in the sewage is serious,so the secondary settling effect becomes worse.
Therefore, following improvement scheme is taken： concentrating and distributing system uses bellmouthings
to concentrate and distribute water,and the amount of bellmouthings should be increased to
meet the requirement of controlling areas; concrete tanks should be increased outside the settling tanks;
the internal structure of secondary 3# 3000 m3 settling tanks should be improved.After putting the improving
scheme into effect, in recent years the oil mass concentration of the sewage at the 3# settling
tank export is below 50 mg/L,which meets the water quality requirement of follow-up filtration system.
出处
《油气田地面工程》
2017年第7期39-42,共4页
Oil-Gas Field Surface Engineering
关键词
聚合物驱采油
污水处理
二级沉降罐
内部结构
整改
polymer flooding oil production
sewage treatment
secondary settling tank
internalstructure
improvement
