响应面分析法优化滑溜水减阻剂类Fenton氧化降黏研究  

RESPONSE SURFACE METHODOLOGY FOR THE OPTIMIZATION OF DRAG REDUCTION AGENTS IN SLICKWATER BY FENTON-LIKE OXIDATION

作　　者：谢娟 贾潇巍 陈文秋 袁梦瑶 王新强 净思拓 Xie Juan;Jia Xiaowei;Chen Wenqiu;Yuan Mengyao;Wang Xinqiang;Jing Situo(Key Laboratory of Shaanxi Province for Environmental Pollution Control Technology&Reservoir Protection in Oilfields,College of Chemistry and Chemical Engineering,Xi’an Shiyou University,Xi’an 710065,Shaanxi,China)

机构地区：[1]西安石油大学化学化工学院陕西省油气田环境污染控制与储层保护重点实验室

出　　处：《精细石油化工》2019年第6期67-72,共6页Speciality Petrochemicals

基　　金：陕西省教育厅教育厅重点实验室科研计划项目（17JS112）;2017年国家级大学生创新创业训练计划项目（201710705030）

摘　　要：采用EDTA-Fe^2+配合物催化H2O2对滑溜水减阻剂EM50进行氧化降黏以利于混凝处理。在单因素试验基础上,采用响应面法(RSM)对初始pH值n(EDTA)∶n(Fe^2+)、Fe^2+加量3个主要因子的最佳水平及其交互作用进行研究与探讨。结果表明,在φ(H2O2)=0.5%时,影响催化氧化降黏的主次因素依次为:Fe^2+投加量、初始pH值、n(EDTA)∶n(Fe^2+);三因素中,初始pH值与n(EDTA)∶n(Fe^2+)两个因素的交互作用显著;根据模型所预测的最优条件为pH=6.8、n(EDTA)∶n(Fe^2+)=1∶1,c(Fe^2+)=0.27 mmol/L。在此条件下,降黏率平均值为81.85%,与模型预测值相对偏差为2.72%,说明建立的模型切实可行。降黏后进行混凝处理,压裂返排液中的SS及COD去除率分别为93.52%和91.31%。EM50 used in the slickwater as drag reduction agents(DRA)was treated with H2O2 catalyzed by EDTA-Fe 2+in order to reduce its viscosity and facilitate coagulation treatment.On the basis of single-factor design,response surface methodology(RSM)were used to research the best level and mutual effect of initial pH,n(EDTA)∶n(Fe^2+)、Fe^2+dosage affected on viscosity-reducing rate.The results showed that inφ(H2O2)=0.5%,the order of three influencing factors on the viscosity-reducing rate is Fe^2+dosage、initial pH、n(EDTA)∶n(Fe^2+).Among these factors,Interaction between pH and n(EDTA)∶n(Fe^2+)had a signifigant impact on the viscosity-reducing efficiency.the predicted optimal conditions was obtained as follows:pH=6.8、n(EDTA)∶n(Fe^2+)=1∶1 and c(Fe^2+)=0.27 mmol/L.Under this conditions,the average viscosity-reducing rate was 81.85%,which is compared with resulting in a final response,the relative deviation to the predicted value was 2.72%,indicating that the model was reliable and accurate.When being treated using chemical coagulation after viscosity reducing,the removal rates of SS and COD in fracturing fluid recovery were 93.52%and 91.31%,respectively.

关 键 词：减阻剂 降黏 响应面法 氧化 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]