Rock-fluid interfacial tension at subsurface conditions: Implications for H2, CO2 and natural gas geo-storage
Abstract
In H2, CO2 and natural gas geo-storage, rock-fluid interfacial tension (γrock−fluid) is a key parameter which influences pore-scale fluid distribution and reservoir-scale gas storage capacity and containment security. However, γrock−fluid data is seriously lacking because of the inability to measure this parameter experimentally. Therefore herein, a semi-empirical method is used to calculate γrock−fluid at geo-storage conditions. Additionally, effects of organic acid and silica nanofluid on γrock−fluid are studied. The following results are obtained. γrock−gas decreases with pressure, temperature, organic acid concentration and carbon number increase, while γrock−H2O increases with organic acid concentration and carbon number increase; γrock−gas first increases and subsequently decreases with silica nanofluid concentration increase, while γrock−H2O first decreases and then increases with silica nanofluid concentration increase; for same thermo-physical and rock surface chemistry conditions, γrock−gas 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.
Keywords
CO geo-storage 2, Natural gas storage, Organic acid and nanofluid, Rock-fluid interfacial tension, Underground hydrogen storage
Document Type
Journal Article
Date of Publication
2021
Volume
46
Issue
50
Publication Title
International Journal of Hydrogen Energy
Publisher
Elsevier
School
School of Engineering / Centre for Sustainable Energy and Resources
RAS ID
39638
Funders
China Scholarship Council
Copyright
subscription content
First Page
25578
Last Page
25585
Comments
Pan, B., Yin, X., & Iglauer, S. (2021). Rock-fluid interfacial tension at subsurface conditions: Implications for H2, CO2 and natural gas geo-storage. International Journal of Hydrogen Energy, 46(50), 25578-25585.
https://doi.org/10.1016/j.ijhydene.2021.05.067