Synthesis, interface activity and oil flooding experiment with an authentic sandstone microscopic model of cationic gemini surfactant

Xiangzeng Wang, Zhen Dong, Ying Zheng, Jianshe Zhao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, a series of cationic gemini surfactants with different hydrophobic tails were prepared and characterized by element analysis, IR spectra, and 1H NMR spectra. The influencing factors of physic-chemical properties of these surfactants were carefully studied. The critical micelle concentration (CMC) of all the surfactants ranged from 3.87 × 10−4 mol L−1 to 8.97 × 10−4 mol L−1 and the values (γcmc) also ranged from 28.62 mN m−1 to 34.07 mN m−1 at CMC level by surface tension experiments. The consequences of the oil/water interface tension experiments indicated that all these prepared surfactants could lower oil/water interface tension to ultra-low with the combination of Na2CO3. C12-2-C12, and C14-2-C14 were chosen as the representative to evaluate the displacement efficiency in the oil flooding experiments using authentic sandstone microscopic model. The results showed that these surfactants could effectively improve the displacement efficiency by 10–20%.

Original languageEnglish
Pages (from-to)1603-1609
Number of pages7
JournalPetroleum science and technology
Volume34
Issue number19
Early online date17 Oct 2016
DOIs
Publication statusE-pub ahead of print - 17 Oct 2016

Keywords

  • authentic sandstone microscopic model
  • Cationic gemini surfactants
  • enhance oil recovery
  • oil/water interface tension
  • surface tension

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