Research of the heavy oil displacement mechanism by using alkaline/surfactant flooding system

Lifeng Chen, Guicai Zhang, Jijiang Ge, Ping Jiang, Jinyu Tang, Yueliang Liu

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)

Abstract

Alkaline/surfactant flooding has great potential for enhancing the recovery of heavy oil due to the synergistic effect between alkali and surfactant. This research is aimed at developing a new alkaline/surfactant system with a sustainable surfactant called alkyl polyglucoside to improve the heavy oil recovery and clarifying its displacement mechanism. A series of oil/water interfacial tension measurements were conducted to screen the alkaline/surfactant system for the heavy oil sample. The oil/water interfacial tension could be reduced to the value of 10-2mN/m with only alkyl polyglucoside (0.05%). When some Na2CO3 (0.5%) and petroleum sulfonate (0.03%) were applied to the above surfactant solution, the oil/water interfacial tension could be further decreased to 10-4mN/m. Several sandpack flood tests were conducted, and the results show that the tertiary oil recovery can reach to 19.4% of the initial oil in place by using the suitable alkaline/surfactant system. Self-emulsification experiment and microscopic test were performed to investigate the displacement mechanism for enhancing heavy oil recovery, and the results indicate that alkaline/surfactant system including proper surfactant can form water-in-oil emulsion with heavy oil at the displacement front and oil-in-water emulsion in the swept region, which is necessary to obtain high sweep efficiency and oil washing ratio respectively.

Original languageEnglish
Pages (from-to)63-71
Number of pages9
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume434
DOIs
Publication statusPublished - Oct 5 2013
Externally publishedYes

Keywords

  • Alkaline/surfactant flooding
  • Alkyl polyglucoside
  • Heavy oil
  • Mechanism
  • Tertiary oil recovery

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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