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Study on the variation of dynamic interfacial tension in the process of alkaline flooding for heavy oil

机译：稠油碱驱过程中动态界面张力变化的研究

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摘要

Experimental investigations have been conducted to elucidate the variation of the dynamic interfacial tension (DIFT) in the process of alkaline flooding for heavy oil. The Binnan heavy oil with high TAN (Total Acid Number) and the Zhuangxi heavy oil with low TAN were pre-equilibrated by long-term contacting with NaOH and Na_2CO_3 solutions. The results show that the heavy oil pre-equilibrated by NaOH solutions almost loses the interfacial activity, and the IFT increases a lot. Although there is still interfacial activity in the heavy oil which is pre-equilibrated by Na_2CO_3 solutions, and the dynamic interfacial tension minimum (DIFT_(min)) changes a little, yet the dynamic interfacial tension equilibrium value (DIFT_(eq)) increases a lot. The effect of interfacial reaction on the interfacial property of oil with low TAN is more severe than that with high TAN. When the alkaline concentration is larger than a certain value, the IFT between the fresh oil with high TAN and the equilibrated alkaline solutions can decrease to ultralow after interfacial reaction, and the Na_2CO_3 system is superior to the NaOH system. However, the IFT between the fresh oil with low TAN and the equilibrated alkaline solutions increases after interfacial reaction. The above results can be used as guidance in the formulation design and mechanisms studies of alkaline flooding for improved heavy oil recovery.
机译：已经进行了实验研究以阐明重油碱性驱油过程中动态界面张力（DIFT）的变化。通过与NaOH和Na_2CO_3溶液长期接触，预先平衡了具有高TAN（总酸值）的Binnan重油和具有低TAN的庄西重油。结果表明，用NaOH溶液预平衡的重油几乎失去了界面活性，并且IFT增加了很多。尽管Na_2CO_3溶液预先平衡了重油中的界面活性，并且动态界面张力最小值（DIFT_（min））略有变化，但动态界面张力平衡值（DIFT_（eq））却增加了很多。界面反应对低TAN油的界面性能的影响比高TAN油更为严重。当碱浓度大于一定值时，界面反应后，高TAN值的新鲜油与平衡碱溶液之间的IFT会降低至超低，Na_2CO_3体系优于NaOH体系。但是，界面反应后，具有低TAN的新鲜油和平衡碱溶液之间的IFT增加。以上结果可作为碱性驱油配方设计和机理研究的指导，以提高稠油采收率。

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  • 来源
    《Fuel》 |2013年第2期|372-378|共7页
  • 作者

    Haihua Pei; Guicai Zhang; Jijiang Ge; Luchao Jin; Lei Ding;

  • 作者单位

    College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, People's Republic of China;

    College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, People's Republic of China,State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, People's Republic of China;

    College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, People's Republic of China;

    College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, People's Republic of China;

    College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    alkaline flooding; heavy oil; dynamic interfacial tension; interfacial reaction; enhanced oil recovery;

    机译：碱性驱油重油;动态界面张力;界面反应提高采油率;

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