聚合物/表面活性剂二元复合驱采出水处理工艺优化研究  

Study on optimization of produced water treatment process of polymer/surfactant binary combination flooding

作　　者：刘亭[1] 杨杰[1] 安强[2] 许亮亮 安佳琦 林坤华 Liu Ting;Yang Jie;An Qiang;Xu Liangliang;An Jiaqi;Lin Kunhua(Second Oil Production Plant of Changqing Oilfield,Qingcheng 745100,China;The Fifth Oil Production Plant of Changqing Oilfield Branch,Xi′an 710021,China;Weinan Luyang Lake Qinggang Natural Gas Resources Utilization Co.,Ltd.,Weinan 714000,China;Changqing Oilfield Branch Gas Production Plant ,Yulin 719000,China;Chengdu Sukun Environmental Protection Technology Co.,Ltd.,Chengdu 611534,China)

机构地区：[1]长庆油田第二采油厂,甘肃庆城745100 [2]长庆油田分公司第五采油厂,陕西西安710021 [3]渭南卤阳湖庆港天然气资源利用有限公司,陕西渭南714000 [4]长庆油田分公司采气二厂,陕西榆林719000 [5]成都苏坤环保科技有限公司,四川成都611534

出　　处：《能源与环保》2022年第4期167-170,176,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学中国基金会(NSFC)(51673122)。

摘　　要：聚合物/表面活性剂二元复合驱采出水含有大量的聚合物和表面活性剂,表面活性剂使油滴表面由憎水性变为亲水性,聚合物使采出水的黏度增大,油滴的界面张力增强。油水乳化严重,稳定性较好,处理难度较大。针对生化处理工艺运行过程中存在的问题,对生化处理工艺进行了优化调整,并进行了物化处理选型试验。研究结果表明,在生化处理工艺中加入物化处理工艺,形成“生化+物化”的处理工艺,破胶剂投加浓度为600 mg/L,絮凝剂投加浓度为10 mg/L,处理后浊度为29.4 FNU,降幅为87.85%,CODCr为338 mg/L,降幅为95.37%,总铁为0.14 mg/L,降低幅度为92.85%,悬浮物及油含量也达到了厂控注水水质标准。提高了采出水处理工艺的抗冲击性和出水水质的稳定性。Polymer/surfactant binary composite flooding produced water contains a large number of polymers and surfactants.Surfactants change the surface of oil droplets from hydrophobicity to hydrophilicity.Polymers increase the viscosity of produced water and enhance the interfacial tension of oil droplets.Oil-water emulsification is serious,the stability is good,and the treatment is more difficult.In this study,aiming at problems existing in operation of biochemical treatment process,the biochemical treatment process is optimized and adjusted,and the selection test of physicochemical treatment is carried out.The results show that the physicochemical treatment process is added to biochemical treatment process to form a"biochemical+physicochemical"treatment process.The dosing concentration of gel breaker is 600 mg/L,and the dosing concentration of flocculant is 10 mg/L.After treatment,the turbidity is 29.4 FNU,with a decrease of 87.85%,the CODCr is 338 mg/L,with a decrease of 95.37%,and the total iron is 0.14 mg/L,with a decrease of 92.85%.The suspended matter and oil content also reach the water quality standard of water injection controlled by plant.The shock resistance and water quality stability of produced water treatment process are improved.

关 键 词：二元复合驱 采出水处理 物化处理 破胶剂 生化处理 

分 类 号：TE357[石油与天然气工程—油气田开发工程]