The performance of supercritical carbon dioxide (scCO₂) foams in aquifer remediation and Enhanced Oil Recovery is negatively affected by the foam instability at underground conditions (elevated temperatures and pressures). In search of solutions, viscoelastic surfactants are considered as potential stabilizers beyond traditional surfactants. There are limited studies on the effect of viscoelasticity on foam static and dynamic properties [1], [2], [3], [4]. We suspect that surfactant viscoelasticity would enhance scCO₂ foam performance in both bulk form and porous media.

A systematic study, including surfactant rheology, foamability, stability, and foam performance in porous media, has been performed to demonstrate the impact of the viscoelasticity of different surfactant solutions on scCO₂ foam performance. The experimental results indicate that surfactant viscoelasticity improves the foam stability while increasing the foamability up to an optimal point, where any further increment in viscoelasticity causes a reduction in foamability. Further, foam flooding performance was positively affected as the foamability of the surfactant solution increased. The results presented in this work advances our understanding of the viscoelasticity effect of surfactants on scCO₂-foam performance in porous media and provides a path for optimization of these fluids for underground applications.

超临界二氧化碳（scCO ₂）泡沫在含水层修复和提高采油率方面的性能受到地下条件（升高的温度和压力）下泡沫不稳定的负面影响。在寻找解决方案时，粘弹性表面活性剂被认为是超越传统表面活性剂的潜在稳定剂。关于粘弹性对泡沫的静态和动态特性的影响的研究还很有限[1]，[2]，[3]，[4]。我们怀疑表面活性剂的粘弹性会增强散装形式和多孔介质中的scCO ₂泡沫性能。

已经进行了系统的研究，包括表面活性剂的流变性，起泡性，稳定性和在多孔介质中的泡沫性能，以证明不同表面活性剂溶液的粘弹性对scCO ₂泡沫性能的影响。实验结果表明，表面活性剂粘弹性改善了泡沫稳定性，同时将起泡性提高至最佳点，其中粘弹性的任何进一步增加都会导致起泡性降低。此外，随着表面活性剂溶液的发泡性增加，泡沫驱满性能受到积极影响。这项工作中提出的结果使我们对表面活性剂对scCO ₂的粘弹性效应有了更深入的了解。-在多孔介质中起泡沫的性能，并为优化地下应用中的这些流体提供了一条途径。