沉降-曝气-生物-过滤工艺处理二元驱采出水的试验研究  

Experimental study on treatment of produced water from binary flooding by sedimentation aeration biological filtration process

作　　者：孙鑫格 马龙渤 石姝彤 郑帅 庾坤 曾玉彬 SUN Xin-ge;MA Long-bo;SHI Shu-tong;ZHENG Shuai;YU Kun;ZENG Yu-bin(Hubei Key Laboratory of Fluid Machinery and Power Engineering Equipment Technology,Wuhan University,Wuhan 430072,China;Petrochina(Xinjiang)Petroleum Engineering Co.,Ltd.,Karamay 834000,China;School of Arts Design,Wuchang University of Technology,Wuhan 430072,China)

机构地区：[1]武汉大学流体机械与动力工程装备技术湖北省重点实验室,湖北武汉430072 [2]中油(新疆)石油工程有限公司,新疆克拉玛依834000 [3]武昌理工学院艺术设计学院,湖北武汉430072

出　　处：《应用化工》2023年第7期2030-2035,共6页Applied Chemical Industry

基　　金：中国石油工程建设有限公司科学研究与技术开发项目(CPECC2021KJ08)。

摘　　要：油田二元驱采出水中含有大量聚合物和表面活性剂等残余驱油剂,驱油剂与水之间的相互作用导致采出水中油珠和胶体颗粒的稳定性增强,采用传统混凝技术的处理成本高、污泥量大,处理后水质难以达到回注指标要求。研究了沉降-曝气-生物接触氧化-过滤的工艺对二元驱采出水的浊度、颗粒电负性和粒径分布的影响。结果表明,最佳工艺条件:重力沉降12 h,在曝气气水比为30∶1的条件下曝气12 h,生物接触氧化7 d,采用纤维球作为过滤材料对二元驱采出水进行过滤处理。现场试验取得了较好的处理效果,处理后水质满足含油<5 mg/L,固体悬浮物<10 mg/L,悬浮物粒径中值<2μm的回注要求。The produced water of oilfield binary flooding contains a large number of residual oil displacement agents such as polymers and surfactants.The interaction between oil displacement agents and water results in the enhanced stability of oil droplets and colloidal particles in the produced water.The treatment cost of traditional coagulation technology is high,the amount of sludge is large,and the quality of treated water is difficult to meet the requirements of reinjection indicators.This paper studies the influence of the process of sedimentation-aeration-biological contact oxidation-filtration on the turbidity,particle electronegativity and particle size distribution of the produced water from binary flooding.The result showed that the best process:gravity sedimentation for 12 h,aeration for 12 h under the condition of aerated water ratio of 30∶1,biological contact oxidation for 7 d,using fiber ball as filter material to filter the produced water from binary flooding.The field test has achieved good treatment effect,and the treated water quality meets the requirements of reinjection with oil content less than 5 mg/L,solid suspended solids less than 10 mg/L,and the median particle size of suspended solids less than 2μm.

关 键 词：二元驱采出水 沉降 曝气 过滤 生物接触氧化 回注 

分 类 号：TQ09[化学工程] TE991.2[石油与天然气工程—石油机械设备]