新疆油田超稠油净水除硅一体化技术研究
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摘要
新疆油田超稠油采出水具有高含油、高矿化度和高含硅量的特性,针对新疆油田A作业区除硅工艺在过热注汽锅炉给水硅质量浓度为90 mg/L左右时导致注汽管网严重结垢的问题,通过大量的试验研究确定采用净水除硅一体化技术去除稠油污水中的SiO2。试验表明:采用除硅一体化工艺并选用除硅剂CG-1、CG-2和助凝剂SDJ-E3来处理新疆油田A作业区稠油污水,在60 min时除硅效果最佳,可满足标准SY 5854—2012和SY 0027—1994的要求(SiO_2≤50 mg/L);在净水除硅一体化工艺中通过分段调整加药浓度可有效除硅并净化水质,采出水pH值约为8,除硅剂CG-1可加在大罐或池子内,避免了管线结垢的问题。该技术可为解决注汽管网结垢问题提供技术指导。
The produced water of super heavy oil in Xinjiang Oilfield has characteristics of high oil content, high mineralization and high silicon content. In the A operation area in Xinjiang Oilfield,when the silicon mass concentration in the feed water of the super heated gas injection boiler is around90 mg/L,the silicon removal process will lead to serious scale formation in the gas injection pipe network. Aiming at the above problem and through a large number of experimental studies, it is determined that SiO_2 can be removed from heavy oil wastewater by using the integrated technology of water purification and silicon removal. Tests show that the integrated silicon removal technology together with the silicon removal agent CG-1, silicon removal agent CG-2 and coagulant SDJ-E3 is used to treat the heavy oil wastewater in the A operation area of Xinjiang Oilfield, and the silicon removal effect is optimal at 60 min, meeting the requirements of standards(SY 5854-2012 and SY 0027-1994) when SiO_2 is not more than 50 mg/L. By adjusting the dosing concentration in different sections in the integrated process of water purification and silicon removal,the purpose of removing silicon can be effectively achieved and the water quality can be purified,and the pH value of the water produced is about 8.The silicon-removing agent CG-1 can be added in large tanks or pools to avoid scaling in pipelines. The technology provides technical guidance for solving the scaling problem in gas injection pipe networks.
The produced water of super heavy oil in Xinjiang Oilfield has characteristics of high oil content, high mineralization and high silicon content. In the A operation area in Xinjiang Oilfield,when the silicon mass concentration in the feed water of the super heated gas injection boiler is around90 mg/L,the silicon removal process will lead to serious scale formation in the gas injection pipe network. Aiming at the above problem and through a large number of experimental studies, it is determined that SiO_2 can be removed from heavy oil wastewater by using the integrated technology of water purification and silicon removal. Tests show that the integrated silicon removal technology together with the silicon removal agent CG-1, silicon removal agent CG-2 and coagulant SDJ-E3 is used to treat the heavy oil wastewater in the A operation area of Xinjiang Oilfield, and the silicon removal effect is optimal at 60 min, meeting the requirements of standards(SY 5854-2012 and SY 0027-1994) when SiO_2 is not more than 50 mg/L. By adjusting the dosing concentration in different sections in the integrated process of water purification and silicon removal,the purpose of removing silicon can be effectively achieved and the water quality can be purified,and the pH value of the water produced is about 8.The silicon-removing agent CG-1 can be added in large tanks or pools to avoid scaling in pipelines. The technology provides technical guidance for solving the scaling problem in gas injection pipe networks.
引文
[1]骆伟,王爱军,张志庆,等.新疆油田稠油污水处理资源化利用技术[J].油气田地面工程,2009,28(9):62-63.LOU Wei,WANG Aijun,ZHANG Zhiqing,et al.Resource utilization technology of heavy oil wastewater treatment in Xinjiang Oilfield[J].Oil-Gas Field Surface Engineering,2009,28(9):62-63.
[2]袁鹏,雷江辉,马尧,等.新疆油田超稠油采出水处理技术优化研究[J].油气田地面工程,2018,37(8):33-36.YUAN Peng,LEI jianghui,MA Yao,et al.Optimization of water treatment technology for ultra-heavy oil production in xinjiang oilfield[J].Oil-Gas Field Surface Engineering,2008,37(8):33-36.
[3]张博.高含硅稠油污水回用技术及其应用基础研究[D].西安:西北大学,2016.ZHANG Bo.Reuse technology and basic research on application of high-silicon heavy oil wastewater[D].Xi'an:Northwest University,2016.
[4]李志国,祝先贵,张建军,等.风城油田超稠油污水回用注汽锅炉技术的优化[J].油气田地面工程,2015,34(3):3-4.LI Zhiguo,ZHU Xiangui,ZHANG jianjun,et al.Optimization of steam injection boiler technology for waste water reuse of super-heavy oil in fengcheng oilfield[J].Oil-Gas Field Surface Engineering,2015,34(3):3-4.
[5]丁洪雷,赵波,卜魁勇,等.油田稠油污水化学混凝除硅技术研究及应用[J].化学工程,2017,45(5):11-14.DING Honglei,ZHAO Bo,BU Kuiyong,et al.Research and application of chemical coagulation and silicon removal technology in heavy oil wastewater[J].Chemical Engineering,2017,45(5):11-14.
[6]崔英.稠油开发地面工程工艺危害分析[D].北京:北京化工大学,2014.CUI Ying.Damage analysis of heavy oil development ground engineering process[D].Beijing:Beijing Chemical University,2014.
[7]王璟,毛进,赵剑强,等.稠油污水蒸发前除硅及有机物的试验研究[J].中国电力,2016,49(1):37-43.WANG jing,MAO jin,ZHAO jianqiang,et al.Evaporation of heavy oil wastewater Experimental study on pre-desiliconization and organics[J].China Electric Power,2016,49(1):37-43.
[8]耿麒翔.稠油污水回用热采锅炉硅垢控制技术研究[D].北京:中国矿业大学,2014.GENG Qixiang.Study on silicon scale control technology of thermal recovery boiler for heavy oil wastewater reuse[D].Beijing:China University of Mining and Technology,2014.
[2]袁鹏,雷江辉,马尧,等.新疆油田超稠油采出水处理技术优化研究[J].油气田地面工程,2018,37(8):33-36.YUAN Peng,LEI jianghui,MA Yao,et al.Optimization of water treatment technology for ultra-heavy oil production in xinjiang oilfield[J].Oil-Gas Field Surface Engineering,2008,37(8):33-36.
[3]张博.高含硅稠油污水回用技术及其应用基础研究[D].西安:西北大学,2016.ZHANG Bo.Reuse technology and basic research on application of high-silicon heavy oil wastewater[D].Xi'an:Northwest University,2016.
[4]李志国,祝先贵,张建军,等.风城油田超稠油污水回用注汽锅炉技术的优化[J].油气田地面工程,2015,34(3):3-4.LI Zhiguo,ZHU Xiangui,ZHANG jianjun,et al.Optimization of steam injection boiler technology for waste water reuse of super-heavy oil in fengcheng oilfield[J].Oil-Gas Field Surface Engineering,2015,34(3):3-4.
[5]丁洪雷,赵波,卜魁勇,等.油田稠油污水化学混凝除硅技术研究及应用[J].化学工程,2017,45(5):11-14.DING Honglei,ZHAO Bo,BU Kuiyong,et al.Research and application of chemical coagulation and silicon removal technology in heavy oil wastewater[J].Chemical Engineering,2017,45(5):11-14.
[6]崔英.稠油开发地面工程工艺危害分析[D].北京:北京化工大学,2014.CUI Ying.Damage analysis of heavy oil development ground engineering process[D].Beijing:Beijing Chemical University,2014.
[7]王璟,毛进,赵剑强,等.稠油污水蒸发前除硅及有机物的试验研究[J].中国电力,2016,49(1):37-43.WANG jing,MAO jin,ZHAO jianqiang,et al.Evaporation of heavy oil wastewater Experimental study on pre-desiliconization and organics[J].China Electric Power,2016,49(1):37-43.
[8]耿麒翔.稠油污水回用热采锅炉硅垢控制技术研究[D].北京:中国矿业大学,2014.GENG Qixiang.Study on silicon scale control technology of thermal recovery boiler for heavy oil wastewater reuse[D].Beijing:China University of Mining and Technology,2014.