Effect of Nanoparticles on Viscosity and Interfacial Tension of Aqueous Surfactant Solutions at High Salinity and High Temperature,Journal of Surfactants and Detergents

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Effect of Nanoparticles on Viscosity and Interfacial Tension of Aqueous Surfactant Solutions at High Salinity and High Temperature
Journal of Surfactants and Detergents ( IF 1.6 ) Pub Date : 2019-11-27 , DOI: 10.1002/jsde.12371
Anastasia A. Ivanova _{1,

2} , Chi Phan ₃ , Ahmed Barifcani ₂ , Stefan Iglauer ₄ , Alexey N. Cheremisin ₁

Affiliation

Surfactant flooding has widely been used as one of the chemically enhanced oil recovery (EOR) techniques. Surfactants majorly influence the interfacial tension, γ, between oil and brine phase and control capillary number and relative permeability behavior and, thus, influence ultimate recovery. Additives, such as nanoparticles, are known to affect surfactant properties and are regarded as promising EOR agents. However, their detailed interactions with surfactants are not well understood. Thus, in this work, we examined the influence of silica nanoparticles on the ability of surfactants to lower γ and to increase viscosity at various temperatures and salinities. Results show that the presence of nanoparticles decreased γ between n‐decane and various surfactant formulations by up to 20%. It was found that γ of nanoparticles–surfactant solutions passed through a minimum at 35 °C when salt was added. Furthermore, the viscosity of cationic surfactant solutions increased at specific salt (1.5 wt.%) and nanoparticle (0.05 wt.%) concentrations. Results illustrate that selected nanoparticles–surfactant formulations appear very promising for EOR as they can lower brine/n‐decane interfacial tension and act as viscosity modifiers of the injected fluids.

中文翻译：

纳米颗粒对高盐度和高温下表面活性剂水溶液的粘度和界面张力的影响

表面活性剂驱油已广泛用作化学增强油采收率（EOR）技术之一。表面活性剂主要影响油相和盐水相之间的界面张力γ，并控制毛细管数和相对渗透性，从而影响最终采收率。已知诸如纳米颗粒的添加剂会影响表面活性剂的性能，并被认为是有前途的EOR剂。但是，它们与表面活性剂的详细相互作用尚不十分清楚。因此，在这项工作中，我们研究了二氧化硅纳米粒子对表面活性剂在各种温度和盐度下降低γ和增加粘度的能力的影响。结果表明，纳米颗粒的存在使正癸烷和各种表面活性剂配方之间的γ降低高达20％。发现添加盐时，纳米粒子-表面活性剂溶液的γ在35°C时通过最小值。此外，阳离子表面活性剂溶液的粘度在特定盐（1.5重量％）和纳米颗粒（0.05重量％）浓度下增加。结果表明，选定的纳米颗粒-表面活性剂配方可提高EOR的前景，因为它们可以降低盐水/正癸烷的界面张力并充当注入流体的粘度调节剂。

更新日期：2019-11-27

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