Characterizing the Evolution of Trapped scCO2 Curvature in Bentheimer and Nugget Sandstone Pore Geometry

During a Geologic Carbon Storage process, supercritical CO₂ (scCO₂) is subjected to a series of dynamic and static conditions where the relationship between pore geometry and the trapped scCO₂ curvature remains to be established. To mimic the dynamic process, two sandstones, Bentheimer and Nugget, were subjected to two successive drainage and imbibition (D-I) cycles and X-ray computed tomography scanned at each residual state to capture the wettability evolution at static conditions in the same pore geometry.
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From this work, we suspect the pore geometry is playing a role in scCO₂ size distributions and use this information to suggest using water pulses to enhance trapping capacity in lower porosity sandstones.