Speaker
Description
Multiphase flow in porous media strongly depends on the apparent wettability. Common approaches for characterizing static apparent wettability include the captive bubble and sessile drop methods, while dynamic contact angles are commonly measured using the tilted plate method. Interestingly, pressure and temperature dependencies have been reported for various gas-water systems using the tilted plate method (1–3), where capillary and gravitational forces dominate, whereas for the captive bubble method(4), where buoyancy and capillary forces dominate, no pressure or temperature dependence has been observed (4).
In this study, we measure the wettability of bubbles and droplets for the N2/water system in contact with a flat, nonporous quartz substrate over a wide range of pressure (5 to 100 bar) and temperature (20 to 110 °C) conditions using three different approaches: captive bubble, sessile drop, and tilted plate. To this end, we use a recently developed in-house multimethod experimental device that enables apparent wettability measurements using the captive bubble, sessile drop, and tilted plate methods within the same experimental cell (5). This setup is combined with an in-house-developed analysis framework capable of automatically analyzing contact angles for all three configurations using a consistent approach. Performing all measurements in the same cell, applying the same analysis method, and combining this with mathematical modelling allowed for a systematic and reliable investigation of the impact of different driving forces on apparent wettability.
References:
1. Iglauer S, Ali M, Keshavarz A. Hydrogen Wettability of Sandstone Reservoirs: Implications for Hydrogen Geo‐Storage. Geophys Res Lett. 2021 Feb 16;48(3). doi: 10.1029/2020GL090814
2. Sarmadivaleh M, Al-Yaseri AZ, Iglauer S. Influence of temperature and pressure on quartz-water-CO2 contact angle and CO2-water interfacial tension. J Colloid Interface Sci. 2015 Mar 1;441:59–64. doi: 10.1016/j.jcis.2014.11.010
3. Hosseini M, Fahimpour J, Ali M, Keshavarz A, Iglauer S. Hydrogen wettability of carbonate formations: Implications for hydrogen geo-storage. J Colloid Interface Sci. 2022 May 15;614:256–66. doi: 10.1016/j.jcis.2022.01.048
4. Hashemi L, Glerum W, Farajzadeh R, Hajibeygi H. Contact angle measurement for hydrogen/brine/sandstone system using captive-bubble method relevant for underground hydrogen storage. Adv Water Resour. 2021 Aug 1;154:103963. doi: 10.1016/j.advwatres.2021.103963
5. Tapias F, Karadimitriou N, Steeb H, Boon M. Integrated System for Multi-Technique Contact Angle Measurements under Pressure and Temperature Control. Submitted to IEEE. 2026.
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