Pore-scale evolution of trapped CO2 at early stages following imbibition using micro-CT imaging

Department of Energy Resources Engineering, Stanford University | Lawrence Berkeley National Laboratory, Earth and Environmental Sciences

Despite its major influence on storage capacity, CO2 plume migration rate, and rates of CO2 dissolution and mineralization, there are outstanding questions regarding the mechanisms, times scales, influence of geological heterogeneity, and degree of residual trapping. The aim of the present study is to track temporal evolution of residually-trapped scCO2 ganglia during the early stages following imbibition, extract critical parameters such as fluid phase connectivity and scCO2 cluster size and quantify their evolution with time using synchrotron X-ray micro-CT imaging.