油气田压裂废液的臭氧气浮深度处理与资源化利用特性
摘要：长庆油田属于典型的低渗透油田,其油气开采过程中通常采用压裂作业进行增产,需要使用大量的新鲜水进行工作液配制,造成油气开采成本较高。针对此问题,采用臭氧气浮一体化(DOF)处理工艺对压裂废液进行深度处理,利用臭氧气浮出水进行工作液配制,探究其资源化利用效果。研究表明,DOF工艺对进水COD、浊度和SS有较好的去除率,采用PAC作为混凝剂时,DOF对COD、浊度和SS的平均去除率分别为31.34%、96.36%、93.71%。采用PFS作为混凝剂时,DOF对COD、浊度和SS的平均去除率分别为33.95%、89.37%、85.11%。DOF进出水三维荧光分析可知DOF工艺对荧光类污染物有着良好的去除效果,结合液相色谱分子量分布分析,DOF工艺处理后有机物向小分子物质转化,并且PAC和PFS作为混凝剂时分子量分布基本一致。利用DOF出水配制的清水泥浆、盐水泥浆和压裂液均可满足油气田井场对三者的各项性能要求。其中,DOF出水配制的盐水泥浆较自来水配制有明显的性能提升,体系失水率下降了40%以上。
关键词：压裂废液臭氧气浮深度处理资源化利用
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参考文献[1] 李华兵,李建霆,李文宏,等．低渗透油藏驱油用缔合聚合物的合成及其油藏适应性研究[J]．油气藏评价与开发,2020,10(6):24-32．
[2] 郝琦,马振鹏,段玉秀．延长油田胍胶压裂返排液循环利用技术研究[J]．应用化工,2020,49(10):2478-2482．
[3] 贺栋．陇东油田水平井压裂废水再生利用技术研究与利用[D]．西安：西安建筑科技大学,2013．
[4] BARATI R,LIANG J T.A review of fracturing fluid systems used for hydraulic fracturing of oil and gas wells.Journal of Applied Polymer Science,2014,131(16)．
[5] LUEK J L,GONSIOR M.Organic compounds in hydraulic fracturing fluids and wastewaters:A review.Water Research,2017,123,536-548．
[6] YOST E E,STANEK J,DEWOSKIN R S,et al.Overview of Chronic Oral Toxicity Values for Chemicals Present in Hydraulic Fracturing Fluids,Flowback,and Produced Waters.Environmental Science and Technology,2016,50 (9),4788-4797．
[7] STRINGFELLOW W T,CAMARILLO M K,DOMEN J K,et al.Identifying chemicals of concern in hydraulic fracturing fluids used for oil production.Environmental Pollution,2017,(1987)220(PA):413-420．
[8] 毛宁,姚留栓,李广平,等．钻采废液集中处理及再生利用模式构建与工程应用[J]．工业水处理,2020,40(10):107-110．
[9] JIN P K,WANG X C,HU G.A dispersed-ozone flotation(DOF)separator for tertiary wastewater treatment.Water Science and Technology,2006,53(9):151-157．
[10] 金鹏康．一种多级臭氧气浮一体化装置：CN20141616487.2017-12-01．
[11] JIN X,SHI Y,HOU R,et al.Role of Al-based coagulants on a hybrid ozonation-coagulation(HOC)process for WWTPeffluent organic matter and ibuprofen removal[J].Environmental Science-Water Research&Technology,2019,5(3):599-608．
[12] JIN P K,JIN X,BJERKELUND V A,et al.A study on the reactivity characteristics of Dispersed effluent organic matter(EfOM)from municipal wastewater treatment plant during ozonation.Water Research,2016,88:643-652．
[13] 季林海．气浮法处理含油污水的工艺优化研究[D]．北京：中国石油大学,2009．
[14] 刘颖,金鑫,金鹏康,等．溶气气浮的微气泡影响因素及其与絮体的结合特性[J]．中国给水排水,2018,34(5):1-5．
[15] 金鹏康,孔茜,金鑫．二级出水中溶解性有机物的分级表征特性[J]．环境化学,2015,34(9):1649-1653．
[16] 金鑫,金鹏康,孔茜,等．污水厂二级出水溶解性有机物臭氧化特性研究[J]．中国环境科学,2015,35(10):2985-2990．
[17] 金鑫．臭氧混凝互促增效机制及其在污水深度处理中的应用[D]．西安：西安建筑科技大学,2016．
[18] LESTER Y,YACOB T,MORRISSEY I,et al.Can we treat hydraulic fracturing flowback with a conventional biological process?The case of guar gum.Environmental Science&Technology Letters,2014,1(1):133-136．
[19] JIN X,WANG Y,ZHANG W,et al.Mechanism of the hybrid ozonation-coagulation (HOC)process:Comparison of preformed Al13polymer and in situ formed Al species.Chemosphere,2019,229:262-272．
[20] 孔茜．污水厂二级出水溶解性有机物分级表征及其臭氧化特性研究[D]．西安：西安建筑科技大学,2016．
[21] 陈德军,雒和敏,铁成军,等．钻井液降滤失剂研究述论[J]．油田化学,2013,30(2):295-300．
[22] 李财富,李本高,汪燮卿．国内水基钻井液降滤失剂研究现状[J]．中外能源,2013,18(2):39-44．
[23] 赵俊,王景,孙泽宁,等．致密气压裂返排液处理回用技术现场应用研究[J]．油气田地面工程,2020,39(11):32-36.
[2] 郝琦,马振鹏,段玉秀．延长油田胍胶压裂返排液循环利用技术研究[J]．应用化工,2020,49(10):2478-2482．
[3] 贺栋．陇东油田水平井压裂废水再生利用技术研究与利用[D]．西安：西安建筑科技大学,2013．
[4] BARATI R,LIANG J T.A review of fracturing fluid systems used for hydraulic fracturing of oil and gas wells.Journal of Applied Polymer Science,2014,131(16)．
[5] LUEK J L,GONSIOR M.Organic compounds in hydraulic fracturing fluids and wastewaters:A review.Water Research,2017,123,536-548．
[6] YOST E E,STANEK J,DEWOSKIN R S,et al.Overview of Chronic Oral Toxicity Values for Chemicals Present in Hydraulic Fracturing Fluids,Flowback,and Produced Waters.Environmental Science and Technology,2016,50 (9),4788-4797．
[7] STRINGFELLOW W T,CAMARILLO M K,DOMEN J K,et al.Identifying chemicals of concern in hydraulic fracturing fluids used for oil production.Environmental Pollution,2017,(1987)220(PA):413-420．
[8] 毛宁,姚留栓,李广平,等．钻采废液集中处理及再生利用模式构建与工程应用[J]．工业水处理,2020,40(10):107-110．
[9] JIN P K,WANG X C,HU G.A dispersed-ozone flotation(DOF)separator for tertiary wastewater treatment.Water Science and Technology,2006,53(9):151-157．
[10] 金鹏康．一种多级臭氧气浮一体化装置：CN20141616487.2017-12-01．
[11] JIN X,SHI Y,HOU R,et al.Role of Al-based coagulants on a hybrid ozonation-coagulation(HOC)process for WWTPeffluent organic matter and ibuprofen removal[J].Environmental Science-Water Research&Technology,2019,5(3):599-608．
[12] JIN P K,JIN X,BJERKELUND V A,et al.A study on the reactivity characteristics of Dispersed effluent organic matter(EfOM)from municipal wastewater treatment plant during ozonation.Water Research,2016,88:643-652．
[13] 季林海．气浮法处理含油污水的工艺优化研究[D]．北京：中国石油大学,2009．
[14] 刘颖,金鑫,金鹏康,等．溶气气浮的微气泡影响因素及其与絮体的结合特性[J]．中国给水排水,2018,34(5):1-5．
[15] 金鹏康,孔茜,金鑫．二级出水中溶解性有机物的分级表征特性[J]．环境化学,2015,34(9):1649-1653．
[16] 金鑫,金鹏康,孔茜,等．污水厂二级出水溶解性有机物臭氧化特性研究[J]．中国环境科学,2015,35(10):2985-2990．
[17] 金鑫．臭氧混凝互促增效机制及其在污水深度处理中的应用[D]．西安：西安建筑科技大学,2016．
[18] LESTER Y,YACOB T,MORRISSEY I,et al.Can we treat hydraulic fracturing flowback with a conventional biological process?The case of guar gum.Environmental Science&Technology Letters,2014,1(1):133-136．
[19] JIN X,WANG Y,ZHANG W,et al.Mechanism of the hybrid ozonation-coagulation (HOC)process:Comparison of preformed Al13polymer and in situ formed Al species.Chemosphere,2019,229:262-272．
[20] 孔茜．污水厂二级出水溶解性有机物分级表征及其臭氧化特性研究[D]．西安：西安建筑科技大学,2016．
[21] 陈德军,雒和敏,铁成军,等．钻井液降滤失剂研究述论[J]．油田化学,2013,30(2):295-300．
[22] 李财富,李本高,汪燮卿．国内水基钻井液降滤失剂研究现状[J]．中外能源,2013,18(2):39-44．
[23] 赵俊,王景,孙泽宁,等．致密气压裂返排液处理回用技术现场应用研究[J]．油气田地面工程,2020,39(11):32-36.
Characteristics of ozone flotation advanced treatment and resource utilization of oil and gas field fracturing wastewater
Abstract: Changqing Oilfield is a typical low permeability oilfield.In the process of oil and gas exploitation,fracturing is usually used to increase production,which requires a large amount of fresh water for working fluid preparation,resulting in high cost of oil and gas exploitation.In view of this problem,this study adopts the Dispersed ozone flotation(DOF)treatment process for advanced treatment of fracturing waste fluid,and uses the DOF process effluent for the preparation of working fluid,to explore the utilization effect of its resources.The research shows that DOF process has a good removal rate of COD,turbidity and SS in influent water.When PAC was used as coagulant,the average removal rates of COD,turbidity and SS by DOF were 31.34%,96.36%and 93.71%,respectively.When PFS was used as coagulant,the average removal rates of COD,turbidity and SS by DOF were 33.95%,89.37% and 85.11%,respectively.Three-dimensional fluorescence analysis of DOF inlet and outlet water shows that DOF process has a good removal effect on fluorescent pollutants.Combined with the analysis of molecular weight distribution by liquid chromatography,the organic matter was transformed into small molecular matter after DOF process.The molecular weight distribution of PAC and PFS as coagulants is basically the same.The clear water mud,brine mud and fracturing fluid prepared from DOF process effluent can meet the performance requirements of the three systems in oil and gas field wellsite.Compared with tap water,the performance of the salt water slurry prepared with DOF effluent is significantly improved,and the water loss rate of the system is reduced by more than 40%.
Keywords: Fracturing wastewater; Ozone flotation; Advanced treatment; Resource recovery;
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