丙烯酸改性聚醚破乳剂的制备与破乳性能评价
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摘要
为提高破乳剂的破乳脱水效果、拓宽适用范围,用甲基丙烯酸对聚醚多元醇破乳剂EG-01、EG-02进行改性,优化了破乳剂的制备条件,研究了破乳剂对胜利油田、苏丹Hglig油田和中海油旅大油田原油的破乳脱水效果。结果表明,当酯化时间为6 h,酯化温度为110℃,甲基丙烯酸、聚醚多元醇和四乙烯五胺质量比为7∶2∶1,过氧化苯甲酰用量为物料总质量的0.2%时合成的破乳剂NG-01和NG-02的脱水效果最佳。与EG-01、EG-02相比,NG-01、NG-02脱水速率快,脱水效果好;三嵌段结构破乳剂NG-02的脱水效果好于二嵌段破乳剂NG-01;NG-02对胜利油田重质原油的脱水率大于90%,对苏丹油田中质原油和中海油旅大油田重质原油的脱水率大于95%。
In order to improve the effect of demulsification and dehydration of demulsifier,broaden the scope of application,the structure of polyether polyols demulsifier EG-01 and EG-02 was modified by methacrylic acid,the preparation condition of demulsifier was optimized,and the effect of demulsification and dehydration of modified demulsifier on crude oil in Shengli oilfield,Sudan oilfield and Lvda oilfield was studied. The results showed that methylacrylic acid modified polyether synthetic demulsifiers NG-01 and NG-02 had the best dehydration effect under optimum synthetic conditions,6 h reaction time,110℃reaction temperature,7∶2∶1 mass ratio of methacrylic acid,polyether polyol and tetraethylene pentamine,and 2% amount of benzoyl peroxide of total materials quality. Compared with EG-01 and EG-02,the dehydration rate of NG-01 and NG-02 was faster,and the dehydration effect was better. The dehydration effect of NG-02 with triblock structure was better than that of NG-01 with diblock structure. The dehydration rate of NG-02 on heavy crude oil in Shengli oilfield was more than 90%,and that on medium crude oil in Sudan oilfield and heavy crude oil in Lvda oilfield of CNOOC was more than 95%.
In order to improve the effect of demulsification and dehydration of demulsifier,broaden the scope of application,the structure of polyether polyols demulsifier EG-01 and EG-02 was modified by methacrylic acid,the preparation condition of demulsifier was optimized,and the effect of demulsification and dehydration of modified demulsifier on crude oil in Shengli oilfield,Sudan oilfield and Lvda oilfield was studied. The results showed that methylacrylic acid modified polyether synthetic demulsifiers NG-01 and NG-02 had the best dehydration effect under optimum synthetic conditions,6 h reaction time,110℃reaction temperature,7∶2∶1 mass ratio of methacrylic acid,polyether polyol and tetraethylene pentamine,and 2% amount of benzoyl peroxide of total materials quality. Compared with EG-01 and EG-02,the dehydration rate of NG-01 and NG-02 was faster,and the dehydration effect was better. The dehydration effect of NG-02 with triblock structure was better than that of NG-01 with diblock structure. The dehydration rate of NG-02 on heavy crude oil in Shengli oilfield was more than 90%,and that on medium crude oil in Sudan oilfield and heavy crude oil in Lvda oilfield of CNOOC was more than 95%.
引文
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[3]赵福麟.乳化原油破乳剂[J].北京:石油大学出版社,1994:104-112.
[4]刘程主,张万福.表面活性剂应用手册[J].北京:化学工业出版社,2002:5-10.
[5]张家营,于芳,许浩伟,等.GD-2新型破乳剂技术研究[J].油气田地面工程,2002,21(2):25-26.
[6]沈明欢.渤海油田聚驱采出液化学破乳研究[D].哈尔滨:哈尔滨工程大学,2007:17-19.
[7]刘佐才.复配原油破乳剂研究[J].油田化学,2001,18(2):141-143.
[8]高庆,陈正国,程时远.甲基丙烯酸甲酯-丙烯酸丁酯-丙烯酸三元溶液聚合研究Ⅱ[J].胶体与聚合物,2000,18(1):22-24.
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[10]XIA lixin,CAO Guoying.Stability and demulsification of emulsions stabilized by asphaltenes or resins[J].J Colloid Interface Sci,2004,271(2):504-506.
[11]宋林花,姜翠华,韩哲茵.丙烯酸高碳醇酯的制备[J].石油化工,2002,31(12):991-993.
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