Contact angle measurement for hydrogen/brine/sandstone system using captive-bubble method relevant for underground hydrogen storage. (August 2021)

• Record Type: Journal Article
• Authors: Hashemi, Leila; Glerum, Wuis; Farajzadeh, Rouhi; Hajibeygi, Hadi
• Is Part Of: Advances in water resources. Volume 154(2021)
• Publication Date: 2021-08
• Subjects: Underground hydrogen storage -- Contact angle -- Hydrogen/brine/sandstone -- Wettability; Hydrology -- Periodicals; Hydrodynamics -- Periodicals; Hydraulic engineering -- Periodicals; 551.48
• DOI: 10.1016/j.advwatres.2021.103964
• Languages: English
• ISSNs: 0309-1708

Abstract

Highlights: For the first time, we experimentally quantify the intrinsic contact angle of H2/Brine/Sandstone Rock. The studies are done by developing a Captive-Bubble setup at high-pressure and elevated temperatures. The measurements are done for different T, P, salinity, and rock type representing in-situ conditions. With the results presented in this paper one can quantify relative permeability (Kr) and capillary pressure (Pc) curves for accurate reservoir-scale modeling and simulation. Abstract: Subsurface porous formations provide large capacities for underground hydrogen storage (UHS). Successful utilization of these porous reservoirs for UHS depends on accurate quantification of the hydrogen transport characteristics at continuum (macro) scale, specially in contact with other reservoir fluids. Relative-permeability and capillary-pressure curves are among the macro-scale transport characteristics which play crucial roles in quantification of the storage capacity and efficiency. For a given rock sample, these functions can be determined if pore-scale (micro-scale) surface properties, specially contact angles, are known. For hydrogen/brine/rock system, these properties are yet to a large extent unknown. In this study, we characterize the contact angles of hydrogen in contact with brine and Bentheimer and Berea sandstones at various pressure, temperature, and brine salinity using captive-bubble method. The experiments are conducted close to the in-situ conditions, which resulted in water-wet intrinsic contact angles, about 25 to 45 degrees. Moreover, no meaningful correlation was found with changing tested parameters. We monitor the bubbles over time and report the average contact angles with their minimum and maximum variations. Given rock pore structures, using the contact angles reported in this study, one can define relative-permeability and capillary-pressure functions for reservoir-scale simulations and storage optimization.