Rock-fluid interfacial tension at subsurface conditions: Implications for H2, CO2 and natural gas geo-storage. (21st July 2021)

• Record Type: Journal Article
• Authors: Pan, Bin; Yin, Xia; Iglauer, Stefan
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 50(2021)
• Page Start: 25578
• Page End: 25585
• Publication Date: 2021-07-21
• Subjects: Rock-fluid interfacial tension -- Underground hydrogen storage -- CO2 geo-storage -- Natural gas storage -- Organic acid and nanofluid; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.05.067
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In H2, CO2 and natural gas geo-storage, rock-fluid interfacial tension ( γ r o c k − f l u i d ) is a key parameter which influences pore-scale fluid distribution and reservoir-scale gas storage capacity and containment security. However, γ r o c k − f l u i d data is seriously lacking because of the inability to measure this parameter experimentally. Therefore herein, a semi-empirical method is used to calculate γ r o c k − f l u i d at geo-storage conditions. Additionally, effects of organic acid and silica nanofluid on γ r o c k − f l u i d are studied. The following results are obtained. γ r o c k − g a s decreases with pressure, temperature, organic acid concentration and carbon number increase, while γ r o c k − H 2 O increases with organic acid concentration and carbon number increase; γ r o c k − g a s first increases and subsequently decreases with silica nanofluid concentration increase, while γ r o c k − H 2 O first decreases and then increases with silica nanofluid concentration increase; for same thermo-physical and rock surface chemistry conditions, γ r o c k − g a s follows the order H2 > CH4 > CO2 . These insights provide pivotal guidance on gas geo-storage and thus aids in the implementation of a more sustainable energy supply chain. Graphical abstract: Image 1 Highlights: γrock−gas decreases with increasing pressure and organic acid concentration. γrock−gas first increases and then decreases with nanofluid concentration increase. γrock−gas follows the order H2 > CH4 > CO2 .