APS体系对京11断块原油的乳化特性
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摘要
为明确三元复合驱油体系(ASP)对京11断块原油的乳化特性,提高三元复合驱后采出液破乳脱水处理效果,室内模拟研究了油水乳状液形成时转速、单一驱油剂(聚合物、表面活性剂、弱碱)以及ASP体系对乳状液稳定性的影响。结果表明:转速对乳状液形成状态有较大的影响,转速越大,形成的乳状液液滴直径越小,乳状液越稳定。在转速4000 r/min、搅拌时间20 min的条件下,随聚合物浓度升高,乳状液稳定性增强,聚合物浓度大于300 mg/L后所形成的乳状液静置2 h后的脱水率(<5%)基本不再变化;表面活性剂在浓度大于500 mg/L后对乳状液稳定有明显的增强作用;弱碱浓度以1000 mg/L为转折点,随着弱碱浓度升高,乳状液稳定性先增强后减弱;ASP体系中,聚合物浓度对乳状液稳定性影响最大,弱碱影响最小。
To clear the emulsification properties of ASP system on the crude oil of the Jing 11 block and improve the demulsification and dehydration treatment effect of the produced fluid of after ASP flooding,through the indoor experiment,the influence of rotation rate,single oil displacement agent(polymer,surfactant,alkaline)and ternary compound system on the emulsion stability on the formed oil-water emulsion was probed. The results indicated that,the rotation rate had great influence on the formation of emulsion. The bigger the rotation rate,the smaller the diameter of emulsion drops and the more stable the emulsion. At the rotation rate of 4000 r/min and the stirring time of 20 minutes,as the polymer concentration rose,the emulsion became stable,and when the polymer concentration was greater than 300 mg/L,the dehydration rate(<5% )of the emulsion changed little. When the surfactant concentration was higher than 500 mg/L,the emulsion stability was strengthened obviously. Weak alkaline concentration was set 0.1% as the turning point,with the increase of weak base concentration,the emulsion stability enhanced firstly and then weakened. The components of the ternary compound system was arranged according to the influence of their on the emulsion stability,polymer concentration>surfactant concentration>weak alkaline concentration.
To clear the emulsification properties of ASP system on the crude oil of the Jing 11 block and improve the demulsification and dehydration treatment effect of the produced fluid of after ASP flooding,through the indoor experiment,the influence of rotation rate,single oil displacement agent(polymer,surfactant,alkaline)and ternary compound system on the emulsion stability on the formed oil-water emulsion was probed. The results indicated that,the rotation rate had great influence on the formation of emulsion. The bigger the rotation rate,the smaller the diameter of emulsion drops and the more stable the emulsion. At the rotation rate of 4000 r/min and the stirring time of 20 minutes,as the polymer concentration rose,the emulsion became stable,and when the polymer concentration was greater than 300 mg/L,the dehydration rate(<5% )of the emulsion changed little. When the surfactant concentration was higher than 500 mg/L,the emulsion stability was strengthened obviously. Weak alkaline concentration was set 0.1% as the turning point,with the increase of weak base concentration,the emulsion stability enhanced firstly and then weakened. The components of the ternary compound system was arranged according to the influence of their on the emulsion stability,polymer concentration>surfactant concentration>weak alkaline concentration.
引文
[1]侯吉瑞,刘中春,岳湘安.复合体系超低界面张力和碱在驱油过程中的实际作用[J].大庆石油地质与开发,2006,25(6):82-86.
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[8]黄强,皮蕾,吴仲岿,等.影响油田采出液油水界面膜稳定性因素的研究[J].湖北大学学报,2014,36(4):358-361.
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[10]熊颖,陈大钧,吴文刚,等.ASP驱油体系各组分对原油乳状液稳定性的影响[J].油气地质与采收率,2008,15(4):69-71.
[11]吴迪,艾广智,李克顺,等.聚合物驱和三元复合驱采出水流变流变性和采出液稳定性研究[J].日用化学品科学,2000,23(1):110-115.
[12]赵凤兰,岳湘安,侯吉瑞,等.ASP体系与大庆原油的乳化作用及影响因素[J].油气地质与采收率,2008,15(3):66-69.
[2]李世军,杨振宇,宋考平,等.三元复合驱中乳化作用对提高采收率的影响[J].石油学报,2003,24(5):71-73.
[3]韩忠娟,杨敬一,徐心茹.SP二元复合驱采出液破乳研究[J].油田化学,2011,28(1):93-96.
[4]孙春柳,康万利,刘卫东,等.影响原油乳状液稳定性的因素研究[J].石油天然气学报,2010,32(2):134-136.
[5]檀国荣,张健.两亲聚合物驱油剂对渤海油田采出液处理的影响[J].石油与天然气化工,2011,40(5):481-485.
[6]康万利,岳湘安,胡靖邦.聚合物对乳状液及液膜的稳定性[J].石油学报,1997,18(4):122-125.
[7]缪云展,段明,张健,等.聚丙烯酰胺影响原油乳状液稳定性的机理[J].石油与天然气化工,2010,39(4):320-322.
[8]黄强,皮蕾,吴仲岿,等.影响油田采出液油水界面膜稳定性因素的研究[J].湖北大学学报,2014,36(4):358-361.
[9]刘艳敏.二元复合驱油水乳化的破乳研究[D].大庆:东北石油大学,2014:37-39.
[10]熊颖,陈大钧,吴文刚,等.ASP驱油体系各组分对原油乳状液稳定性的影响[J].油气地质与采收率,2008,15(4):69-71.
[11]吴迪,艾广智,李克顺,等.聚合物驱和三元复合驱采出水流变流变性和采出液稳定性研究[J].日用化学品科学,2000,23(1):110-115.
[12]赵凤兰,岳湘安,侯吉瑞,等.ASP体系与大庆原油的乳化作用及影响因素[J].油气地质与采收率,2008,15(3):66-69.