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China Surfactant Detergent & Cosmetics ›› 2025, Vol. 55 ›› Issue (8): 961-968.doi: 10.3969/j.issn.2097-2806.2025.08.002

• Invited paper • Previous Articles     Next Articles

Study on interfacial dilational rheology of surfactant flooding with low-interfacial-tension surfactants

Yanping Chu1,2,Feng Gao1,2,Weihua Zhang3,Lei Zhang4,Lu Zhang4,*()   

  1. 1. Exploration and Development Research Institute, Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163712, China
    2. State Key Laboratory of Continental Shale Oil, Daqing, Heilongjiang 163712, China
    3. No.2 Oil Production Plant, Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163414, China
    4. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2025-06-06 Revised:2025-07-11 Online:2025-08-22 Published:2025-08-28
  • Contact: *E-mail: luyiqiao@mail.ipc.ac.cn.

Abstract:

The interfacial dilational rheological properties of anionic surfactants heavy alkylbenzene sulfonate (HABS) and petroleum sulfonate (PS) were studied by spinning drop method. The effects of oscillation frequency, surfactant concentration, oil phase and interfacial tension on the interfacial modulus were investigated. The differences of interfacial film strength and interfacial activity between HABS and PS were compared. The results showed that the hydrophilic-lipophilic balance of HABS was better than that of PS, which could reduce the interfacial tension to the magnitude order of 0.01 mN/m against decane and crude oil. Both HABS and PS molecules were dominated by electrostatic repulsion, in which the diffusion-exchange process was dominant, and the viscosity of interfacial film was high. At the decane-water interface, compared with PS, the diffusion-exchange of HABS who had smaller molecular size was faster, the viscosity of interface film was higher, and the dilational modulus decreased more significantly at high concentration. The surface-active components in crude oil adsorbed on the crude oil-water interface, resulting in similar viscoelastic properties of interfacial films of HABS and PS. There was synergistic effect between HABS and crude oil components. As a result, HABS could not only reduce the interfacial tension to the magnitude order of 0.01 mN/m, but also maintain certain interfacial film strength, which showed great potential in improving crude oil recovery.

Key words: spinning drop method, interfacial tension, interfacial dilational modulus, heavy alkylbenzene sulfonate, petroleum sulfonate

CLC Number: 

  • TQ423