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One of the fundamental physical phenomena related to CO2 injection in subsurface brine-saturated formations is the dissolution-diffusion-convection process of CO2. The injected supercritical CO2 being less dense than brine settles beneath the formation seal. The overlying CO2-saturated brine is slightly heavier than brine itself thus a density- driven convective flow occurs which will enhance the...
Injection of anthropogenic carbon dioxide (CO2) into deep saline geological formations is a possible long-term solution of removing CO2 from the atmosphere. The early injection of CO2 into saline aquifer is known as drainage and can cause unstable fingers to extend into the saturated rock pores. In this work, the crossover from capillary invasion to viscous fingering to fracturing is studied. Experimentally,...
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