弱碱三元驱乳状液SY-686破乳剂破乳效果
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摘要
为解决弱碱石油磺酸盐三元驱乳状液破乳难的问题,通过室内实验评价了SY-686破乳剂的破乳性能、通过单滴法研究了破乳剂对油滴聚并的影响,同时评价了破乳剂对界面流变性的影响。结果表明:SY-686非离子聚醚破乳剂在浓度为50mg·L~(-1)时,破乳后脱水率为84.4%、油相含水率为25.6%、水相含油量为300.7mg·L~(-1);增加破乳剂浓度,有利于油滴聚并,且界面剪切粘度和界面剪切弹性模量降低,最终达到破乳目的。因此,SY-686破乳剂主要通过对界面膜的影响来达到破乳效果,破乳机理主要为界面膜顶替机理。
In order to solve the difficult problem of the emulsion in the weak base petroleum sulfonate ASP flooding, the demulsification performance of SY-686 demulsifier and its influence on the coalescence of oil droplets and interfacial rheological properties were evaluated through laboratory experiments. The results show that the dehydration rate of SY-686 non-ionic polyether demulsifier at the concentration of 50 mg·L~(-1) is 84.4%, the water cut in the oil phase is 25.6% and the oil content in the water phase is 300.7 mg·L~(-1); Increasing the demulsifier concentration is conducive to the coalescence of oil droplets, and decreasing the interfacial shear viscosity and the interfa-cial shear elastic modulus, and finally achieving the purpose of demulsification. Therefore, SY-686 demulsifier mainly achieves the demulsification effect by means of the impact on the interface membrane, and its demulsification mechanism is mainly the interface membrane displacement mechanism.
In order to solve the difficult problem of the emulsion in the weak base petroleum sulfonate ASP flooding, the demulsification performance of SY-686 demulsifier and its influence on the coalescence of oil droplets and interfacial rheological properties were evaluated through laboratory experiments. The results show that the dehydration rate of SY-686 non-ionic polyether demulsifier at the concentration of 50 mg·L~(-1) is 84.4%, the water cut in the oil phase is 25.6% and the oil content in the water phase is 300.7 mg·L~(-1); Increasing the demulsifier concentration is conducive to the coalescence of oil droplets, and decreasing the interfacial shear viscosity and the interfa-cial shear elastic modulus, and finally achieving the purpose of demulsification. Therefore, SY-686 demulsifier mainly achieves the demulsification effect by means of the impact on the interface membrane, and its demulsification mechanism is mainly the interface membrane displacement mechanism.
引文
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[19]王俊,宋程,李翠勤,等.三元组分对弱碱三元复合驱模拟乳状液乳化稳定性的影响[J].中国石油大学学报(自然科学版),2016,40(1):146-154.
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[22]侯吉瑞,谢玉银,赵凤兰,等.复合体系各组分对油水界面剪切粘弹性的影响规律[J].油气地质与采收率,2015,22(1):68-73.
[2]王玉普,刘义坤,邓庆军.中国陆相砂岩油田特高含水期开发现状及对策[J].东北石油大学学报,2014,38(1):1-9.
[3]孙哲,卢祥国,孙学法,等.弱碱三元复合驱增油效果影响因素及其作用机理研究[J].石油化工高等学校学报,2018,31(1):1-7.
[4]冉法江.弱碱石油磺酸盐提高采收率技术室内实验研究[J].大庆师范学院学报,2011,31(6):86-89.
[5]徐春玲.弱碱三元复合驱注入端结垢规律分析[J].油气田地面工程,2017,(12):67-69.
[6]赵长久,赵群,么世椿.弱碱三元复合驱与强碱三元复合驱的对比[J].新疆石油地质,2006,27(6):728-730.
[7]GUO H,LI Y Q,GU Y Y,et al.Comparison of Strong Alkali and Weak Alkali ASP Flooding Pilot Tests in Daqing Oilfield[C].SPE-179661-MS,2016.
[8]刘春天,李星.驱替体系的主要性质对驱油效率的影响[J].油气地质与采收率,2012,19(1):66-68.
[9]GUILLEN V R,CARVALHO MS,ALVARADO V.Pore Scale and Macroscopic Displacement Mechanisms in Emulsion Flooding[J].Transport in Porous Media,2012,94(1):197-206.
[10]栾和鑫,陈权生,陈静,等.驱油体系乳化综合指数对提高采收率的影响[J].油田化学,2017,34(3):528-531.
[11]吴迪,王翀,赵凤玲,等.石油磺酸盐表面活性剂弱碱体系三元复合驱采出水的显微结构和油水分离特性[J].精细与专用化学品,2015,23(8):27-33.
[12]赵觅,吴迪,王鉴.石油磺酸盐驱油体系微乳液的形成及增溶特性研究[J].科学技术与工程,2015,15(28):144-150.
[13]王克亮,皮彦明,吴岩松,等.三元复合体系的乳化性能对驱油效果的影响研究[J].科学技术与工程,2012,12(10):2428-2431.
[14]刘立新,刘远,陆浩宇,等.驱油剂石油磺酸盐对原油乳液破乳的影响[J].化工科技,2015,23(2):5-9.
[15]薄艳红,李季成.原油水含量的测定蒸馏法:GB/T 8929-2006[S].北京:中国标准出版社,2006.
[16]冯晓敏,赵凤玲,薛雅芳,等.油田采出水中含油量测定方法分光光度法:SY/T 0530-2011[S].北京:石油工业出版社,2011.
[17]WANG J,HU F L,LI C Q,et al.Synthesis of dendritic polyether surfactants for demulsification[J].Separation&Purification Technology,2010,73(3):349-354.
[18]康万利,李媛,单秀华,等.三元复合驱碱/表面活性剂/聚合物模拟原油乳状液稳定动力学特性[J].应用化学,2012,29(4):428-433.
[19]王俊,宋程,李翠勤,等.三元组分对弱碱三元复合驱模拟乳状液乳化稳定性的影响[J].中国石油大学学报(自然科学版),2016,40(1):146-154.
[20]WANG M,HUANG J,ZHANG X,etal.Demulsification mechanism of simulated liquid production in the polymer-surfactant flooding process[C].International Conference on Industrial Economics System and Industrial Security Engineering,IEEE,2016:1-5.
[21]魏鸿鹏.聚表剂驱采出液破乳技术研究[D].东北石油大学,2016.
[22]侯吉瑞,谢玉银,赵凤兰,等.复合体系各组分对油水界面剪切粘弹性的影响规律[J].油气地质与采收率,2015,22(1):68-73.