Synthesis, interfacial activity and rheological properties of low interfacial tension viscoelastic Gemini surfactants

Feng, Shuyun; Jiang, Zhaowen; Tang, Shanfa; Hu, Ruizhi; Jin, Lijun; Wang, Siyao; Wang, Rui

doi:10.1016/j.petrol.2021.109845

Cited by 15 publications

(4 citation statements)

References 31 publications

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“…At present, the heterogeneous-compound flooding based on micro-dispersed gel can expand the sweep by the viscosity of the micro-dispersed-gel solution plugging the water channel [32][33][34]. By combining the micro-dispersed gel [35] with the surfactant, the mechanism of plugging the high-permeability channel [36,37], low interfacial tension [38][39][40][41], and wettability reversal [42,43] can be realized in the displacement stage to improve the oil recovery rate.…”

Section: Introductionmentioning

confidence: 99%

Study on the Adaptability Evaluation of Micro-Dispersed-Gel-Strengthened-Alkali-Compound System and the Production Mechanism of Crude Oil

Wang,

Wu,

Liu

et al. 2024

Processes

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A novel micro-dispersed-gel (MDG)-strengthened-alkali-compound flooding system was proposed for enhanced oil recovery in high-water-cut mature oilfields. Micro-dispersed gel has different adaptability and application schemes with sodium carbonate and sodium hydroxide. The MDG-strengthened-alkali flooding system can reduce the interfacial tension to an ultra-low interfacial-tension level of 10−2 mN/m, which can reverse the wettability of rock surface. After 30 days aging, the MDG-strengthened-Na2CO3 flooding system has good viscosity retention of 74.5%, with an emulsion stability of 79.13%. The enhanced-oil-recovery ability of the MDG-strengthened-Na2CO3 (MDGSC) flooding system is 43.91%, which is slightly weaker than the 47.78% of the MDG-strengthened-NaOH (MDGSH) flooding system. The crude-oil-production mechanism of the two systems is different, but they all show excellent performance in enhanced oil recovery. The MDGSC flooding system mainly regulates and seals micro-fractures, forcing subsequent injected water to enter the low-permeability area, and it has the ability to wash the remaining oil in micro-fractures. The MDGSH flooding system mainly removes the remaining oil on the rock wall surface in the micro-fractures by efficient washing, and the MDG particles can also form weak plugging of the micro-fractures. The MDG-strengthened-alkali flooding system can be used as an alternative to enhance oil recovery in high-water-cut and highly heterogeneous mature oilfields.

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Section: Introductionmentioning

confidence: 99%

Study on the Adaptability Evaluation of Micro-Dispersed-Gel-Strengthened-Alkali-Compound System and the Production Mechanism of Crude Oil

Wang,

Wu,

Liu

et al. 2024

Processes

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“…Therefore, micelles can be formed at very low concentration of surfactant. Under appropriate conditions, rod like aggregates can be formed, resulting in remarkable viscoelasticity of solutions [4]. However, in most cases, these covalently bonded Gemini surfactants require complicated synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Gemini surfactants [1] have always been a hot research topic in the eld of colloid and interface chemistry [2][3][4]. Compared with the traditional ionic surfactants, Gemini surfactants show excellent e ciencies in reducing surface tension and forming micelles [2].…”

Section: Introductionmentioning

confidence: 99%

Temperature and pH responsive behavior of wormlike micelles formed by a long chain Gemini-like surfactant

Pei

Pan

Han³

et al. 2023

Preprint

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A Gemini-like surfactant is formed by connecting short chain dibasic acid and long chain tertiary amine in the molar ratio of 1:2 through the non-covalent action of electrostatic attraction, and does not need complicated synthesis. Due to the tertiary amine group in the Gemini-like surfactant, it exhibits pH-responsive properties. However, in the research, we were pleasantly surprised to find that the Gemini-like surfactants also showed temperature response characteristics. With the increase of temperature, the viscosity of the system increases rapidly, and it is resistant to high temperatures. At 60°C, the zero-shear viscosity of the system at the concertation of 300 mM can reach an extremely high value of 11967.73 Pa·s, which was higher than most of wormlike micelles formed by the conventional covalently linked oligomeric counterparts. The reason for this phenomenon may be that as the temperature increases, the hydrogen bonds in the system are destroyed, resulting in the reduction of the repulsive force between molecules and the shortening of the intermolecular distance, which makes the micelles more entangled closely.

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“…As a result, oligomeric surfactants exhibit viscoelasticity at lower salt and surfactant concentrations (Kusano et al, 2012(Kusano et al, , 2016. In addition to surfactant concentration (Wang et al, 2019;Wei et al, 2012), salt structure (Chen et al, 2018;Li et al, 2020), salinity (Lu et al, 2008), and carbon chain length (Acharya et al, 2004;Feng et al, 2022), the rheological properties of oligomeric surfactants are also determined by the type of spacer group (Garcia et al, 2017;Pei et al, 2011) and the degree of oligomerization (In et al, 2000;Kusano et al, 2012). Currently, studies on the rheological behavior of oligomeric surfactants focus on Gemini surfactants (Feng et al, 2022;Li et al, 2020;Tian et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Rheology on novel viscoelastic trimeric octadecyl zwitterionic surfactant micelle solutions

Han

Fang

et al. 2023

J Surfact & Detergents

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In this work, a novel trimeric octadecyl zwitterionic surfactant (TOCC) was successfully synthesized. TOCC was compounded with sodium salicylate (NaSal) for an optimized formulation to form viscoelastic micelles. The effects of NaSal concentration, pH, and temperature on the rheological properties of TOCC and TOCC/NaSal micelle solutions were investigated. The flow curves for both TOCC and TOCC/NaSal micelle solutions can be fitted with the Carreau–Yasuda model. Zero shear viscosity of TOCC/NaSal micelle solution increased and then decreased with increasing NaSal concentration, and the same trend was observed for viscoelasticity. Some micelle solutions exhibited significant thixotropy with stress overshoot. The optimal composition of the TOCC/NaSal micelle solution obtained was 5.0/0.5 wt%. Frequency sweep in the form of Cole–Cole plots indicated that the viscoelastic modulus of the TOCC/NaSal micelle solution fitted the Maxwell model at low and medium frequencies. With increasing pH, 5.0 wt% TOCC micelle solution had the maximum zero shear viscosity at pH = 6.9. The steady‐state viscosities of different concentrations of TOCC micelle solutions reached their maximum at neutral conditions (pH = 6.5 ~ 7.0). Viscoelastic modulus of 5.0 wt% TOCC and TOCC/NaSal (5.0/0.5 wt%) micelle solutions decreased with increasing temperature, and thermal thixotropy was observed in both micelle solutions. The novel TOCC and TOCC/NaSal micelle solutions enrich the variety of trimeric surfactants and viscoelastic micelle solutions. This study provides a rheological reference for the applications of viscoelastic trimeric surfactants in smart materials and oil fields.

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Synthesis, interfacial activity and rheological properties of low interfacial tension viscoelastic Gemini surfactants

Cited by 15 publications

References 31 publications

Study on the Adaptability Evaluation of Micro-Dispersed-Gel-Strengthened-Alkali-Compound System and the Production Mechanism of Crude Oil

Study on the Adaptability Evaluation of Micro-Dispersed-Gel-Strengthened-Alkali-Compound System and the Production Mechanism of Crude Oil

Temperature and pH responsive behavior of wormlike micelles formed by a long chain Gemini-like surfactant

Rheology on novel viscoelastic trimeric octadecyl zwitterionic surfactant micelle solutions

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