Petroleum Science

, Volume 8, Issue 1, pp 93–98

Interfacial properties of Daqing crude oil-alkaline system

  • Mei-qin Lin
  • Xue-qin Xu
  • Jing Lv
  • Hua Zong
  • Ming-yuan Li
  • Zhao-xia Dong
Article

Abstract

The oil/water interfacial properties of crude oil emulsions formed by alkaline/surfactant/polymer (ASP) flooding in the Daqing Oilfield were investigated in this paper by the measurement of interfacial tension, interfacial shear viscosity and Zeta potential of the oil/water system. The result showed that both NaOH and Na2CO3 could react with acid substances in the crude oil to produce interfacially active components, which are adsorbed on the interfaces between the aqueous phase and oil phase, resulting in a decrease of the interfacial tension, negatively charging the surface of oil droplets, but making little change in the interfacial shear viscosity. For the same ionic strength of NaOH and Na2CO3, the interfacial tension of NaOH solution-crude oil system is lower, but the interfacial shear viscosity of NaOH solution-crude oil system is higher, than that of Na2CO3 solution-crude oil system. The negative value of the Zeta potential on the surface of the oil droplets is large. Accordingly, the O/W emulsion of NaOH solution-crude oil system is more stable than that of Na2CO3 solution-crude oil system.

Key words

Alkali interfacial tension interfacial shear viscosity Zeta potential turbidity 

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References

  1. Acevedo S, Ranaudo M A, Escobar G and Gutiérrez X. Dynamic interfacial tension measurement of heavy crude oil-alkaline systems. Fuel. 1999. 78: 309–317CrossRefGoogle Scholar
  2. Deng S B, Bai R B, Chen J P, et al. Effects of alkaline/surfactant/polymer on stability of oil droplets in produced water from ASP flooding. Colloids and Surfaces. 2002. 211: 275–284CrossRefGoogle Scholar
  3. Dicharry C, Arla D, Sinquin A, et al. Stability of water/crude oil emulsions based on interfacial dilatational rheology. Journal of Colloid and Interface Science. 2006. 297(2): 785–791CrossRefGoogle Scholar
  4. Guo J X, Liu Q, Li M Y, et al. The effect of alkali on crude oil/water interfacial properties and the stability of crude oil emulsions. Colloids and Surfaces. 2006. 273: 213–218CrossRefGoogle Scholar
  5. Lakatos-Szabo J and Lakatos I. Effect of alkaline materials on interfacial rheological properties of oil-water system. Colloid Polym Sci. 1999. 277: 41–47CrossRefGoogle Scholar
  6. Li M Y, Xu M J, Ma Y, et al. Interfacial film properties of asphaltenes and resins. Fuel. 2002. 81: 1847–1853CrossRefGoogle Scholar
  7. Luo X H, Lin M Q, Wu Z L, et al. Emulsification of crude oil with alkaline-surfactant-polymer flooding system. Fine Chemicals. 2003. (12): 721–741 (in Chinese)Google Scholar
  8. Opawale F O and Burgess D J. Influence of interfacial properties of lipophilic surfactants on water-in-oil emulsion stability. J. Colloid Int. Sci. 1998. 197: 142–150CrossRefGoogle Scholar
  9. Shen P P and Yu J Y. Basic Research on Enhanced Oil Recovery. Beijing: Petroleum Industry Press. 2001 (in Chinese)Google Scholar
  10. Wan D M. Pilot tests of alkaline/surfactant/polymer flooding in the Daqing oil field. SPE 36748. 1996. 229–243Google Scholar
  11. Wu D, Meng X C, Zhang R Q, et al. Stability and chemical treatment of Daqing Oilfield ASP flooding produced water. Fine Chemicals. 2001. 18(2): 86–88 (in Chinese)Google Scholar
  12. Zhang R Q, Liang C H and Wu D. Characterization and demulsification of produced liquid from weak base ASP flooding. Colloids and Surface A: Physicochem. Eng. Aspects. 2006. 290: 164–171CrossRefGoogle Scholar

Copyright information

© China University of Petroleum (Beijing) and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Mei-qin Lin
    • 1
  • Xue-qin Xu
    • 1
  • Jing Lv
    • 2
  • Hua Zong
    • 3
  • Ming-yuan Li
    • 1
  • Zhao-xia Dong
    • 1
  1. 1.Enhanced Oil Recovery Research CenterChina University of PetroleumBeijingChina
  2. 2.Research Institute of Petroleum Exploration & DevelopmentPetroChinaBeijingChina
  3. 3.Shengli Engineering & Consulting Co., Ltd.SINOPECDongying, ShangdongChina

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