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<p>Foams have found widespread application in a variety of industries, owing to their distinctive characteristics. In the field of oil development, the injection of foam into the formation is a common method to enhance oil recovery. However, when traditional foam systems encounter the oil phase, the spreading of the oil phase on the liquid film leads to a significant decrease in their stability, which adversely affects their application. In this study, two surfactants, sodium dodecyl sulfate and lauramidopropyl hydroxy sulfobetaine, were selected and compounded at a mass ratio of 2:1 to construct a foam system with optimal foamability and foam stability. At 0.3 wt%, the foam volume reached 820 mL, and the liquid drainage half-life was 6.73&#xa0;min. After adding 0.02 wt% bacterial cellulose, the foam volume of the system only decreased by 30 mL, but the half-life increased by 8.2&#xa0;min. The results of single-bubble oil resistance experiments and microscopic model experiments both demonstrated that the ternary composite foam system exhibited effective oil resistance. Through emulsification experiments combined with the measurement of interfacial tension and interfacial dilatation modulus, it was found that the excellent oil resistance of the ternary composite foam system was due to the low oil-water interfacial tension and high interfacial dilatation modulus.</p>

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Experimental study on the application of cellulose to enhance the oil resistance of aqueous foam systems

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Ping Jiang,
  • Hui Lu,
  • Chenxi Li,
  • Jiaxing Teng,
  • Xiaoyang Liang,
  • Hao Li,
  • Zhaoxin Yuan

摘要

Foams have found widespread application in a variety of industries, owing to their distinctive characteristics. In the field of oil development, the injection of foam into the formation is a common method to enhance oil recovery. However, when traditional foam systems encounter the oil phase, the spreading of the oil phase on the liquid film leads to a significant decrease in their stability, which adversely affects their application. In this study, two surfactants, sodium dodecyl sulfate and lauramidopropyl hydroxy sulfobetaine, were selected and compounded at a mass ratio of 2:1 to construct a foam system with optimal foamability and foam stability. At 0.3 wt%, the foam volume reached 820 mL, and the liquid drainage half-life was 6.73 min. After adding 0.02 wt% bacterial cellulose, the foam volume of the system only decreased by 30 mL, but the half-life increased by 8.2 min. The results of single-bubble oil resistance experiments and microscopic model experiments both demonstrated that the ternary composite foam system exhibited effective oil resistance. Through emulsification experiments combined with the measurement of interfacial tension and interfacial dilatation modulus, it was found that the excellent oil resistance of the ternary composite foam system was due to the low oil-water interfacial tension and high interfacial dilatation modulus.