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- W1973429802 abstract "The wetting properties of CO2-brine-rock systems will have a major impact on the management of CO2 injection processes. The wettability of a system controls the flow and trapping efficiency during the storage of CO2 in geological formations as well as the efficiency of enhanced oil recovery operations. While recent studies have shown CO2 to generally act as a non-wetting phase in siliciclastic rocks, some observations report that the contact angle varies with pressure, temperature and water salinity. Additionally, there is a wide range of reported contact angles for this system, from strongly to weakly water-wet. In the case of some minerals, intermediate wet contact angles have been observed. Uncertainty with regard to the wetting properties of CO2-brine systems is currently one of the remaining major unresolved issues with regards to reservoir management of CO2 storage. In this study, we make semi-dynamic capillary pressure measurements of supercritical CO2 and brine at reservoir conditions to observe shifts in the wetting properties. We utilize core analysis techniques to evaluate core-scale effective wetting properties mainly by comparing the capillarity at different conditions on the same rock. We evaluate wettability variation within a single rock with temperature, pressure, and salinity across a range of conditions relevant to subsurface CO2 storage. This paper will include the initial results of measurements in a Berea sandstone sample across a wide range of conditions representative of subsurface reservoirs suitable for CO2 storage (5-20 MPa, 25-50 oC, 0-5 mol kg-1). The measurement uses X-ray CT imaging in a state of the art core flooding laboratory designed to operate at high temperature, pressure, and concentrated brines." @default.
- W1973429802 created "2016-06-24" @default.
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- W1973429802 date "2014-01-01" @default.
- W1973429802 modified "2023-10-16" @default.
- W1973429802 title "Effective Wettability Measurements of CO2-brine-Sandstone System at Different Reservoir Conditions" @default.
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- W1973429802 doi "https://doi.org/10.1016/j.egypro.2014.11.572" @default.
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