Geologic CO₂ sequestration is a climate change mitigation strategy that prevents CO₂ emissions to the atmosphere by capturing CO₂ gasses from large point source emissions streams and then pressurizing and pumping the supercritical-state CO₂ into underground geologic storage reservoirs. Once underground, CO₂ is prevented from buoyant migration to the surface...
This work utilizes synchrotron-based x-ray computed microtomography (x-ray CMT) imaging to quantify
the volume and topology of supercritical carbon dioxide (scCO₂) on a pore-scale basis throughout the
primary drainage process of a 6 mm diameter Bentheimer sandstone core. Experiments were performed
with brine and scCO₂ at 8.3 MPa (1200 psi)...
This work examines the impact of a viscosity force parameter, fluid velocity, and a capillary force parameter, interfacial tension, on the saturation, morphology, and topology of NW fluid in Bentheimer sandstone after primary imbibition, drainage, and secondary imbibition. Brine and air (used as a proxy for supercritical CO₂) flow experiments...