Impact of pressure and temperature on CO2-brine-mica contact angles and CO2-brine interfacial tension: Implications for carbon geo-sequestration
MetadataShow full item record
© 2015 Elsevier Inc.. Precise characterization of wettability of CO2-brine-rock system and CO2-brine interfacial tension at reservoir conditions is essential as they influence capillary sealing efficiency of caprocks, which in turn, impacts the structural and residual trapping during CO2 geo-sequestration. In this context, we have experimentally measured advancing and receding contact angles for brine-CO2-mica system (surface roughness ~12nm) at different pressures (0.1MPa, 5MPa, 7MPa, 10MPa, 15MPa, 20MPa), temperatures (308K, 323K, and 343K), and salinities (0wt%, 5wt%, 10wt%, 20wt% and 30wt% NaCl). For the same experimental matrix, CO2-brine interfacial tensions have also been measured using the pendant drop technique. The results indicate that both advancing and receding contact angles increase with pressure and salinity, but decrease with temperature. On the contrary, CO2-brine interfacial tension decrease with pressure and increase with temperature. At 20MPa and 308K, the advancing angle is measured to be ~110°, indicating CO2-wetting. The results have been compared with various published literature data and probable factors responsible for deviations have been highlighted. Finally we demonstrate the implications of measured data by evaluating CO2 storage heights under various operating conditions. We conclude that for a given storage depth, reservoirs with lower pressures and high temperatures can store larger volumes and thus exhibit better sealing efficiency.
Showing items related by title, author, creator and subject.
Impact of Solid Surface Energy on Wettability of CO2-brine-Mineral Systems as a Function of Pressure, Temperature and SalinityArif, Muhammad; Barifcani, Ahmed; Lebedev, Maxim; Iglauer, Stefan (2017)CO 2 storage refers to the methods employed to inject CO 2 in depleted oil and gas reservoirs and deep saline aquifers for long term storage of CO 2 with the objective to reduce the anthropogenic CO 2 emissions. ...
Electrochemical investigation of the effect of temperature, salinity and salt type on brine/mineral interfacial propertiesArif, Muhammad; Jones, Franca; Barifcani, Ahmed; Iglauer, Stefan (2017)CO2 wettability of minerals and CO2/brine interfacial tension are critical parameters that significantly influence the underground geological storage of CO2. These interfacial phenomena are proven to be a function of ...
Solid/CO2 and solid/water interfacial tensions as a function of pressure, temperature, salinity and mineral type: Implications for CO2-wettability and CO2 geo-storageArif, M.; Barifcani, Ahmed; Iglauer, S. (2016)Wettability of CO2/brine/mineral systems plays a significant role in the underground geological storage of CO2 as it governs the fluid flow and distribution mechanism within the porous medium. Technically, wettability is ...