Geologic sequestration of CO_2 in deep sedimentary formations is a promising solution for reducing emissions of CO_2 to the atmosphere. The transport of CO_2 in geologic formations is controlled by the small micron geometry of the sedimentary layer's void space. The size, shape, connectivity, and tortuosity of pores and pores throats have a greater impact on the permeability and macroscopic transport rate than total pore volume. Pore-scale transport qualities influence how much of the pore volume is accessed for CO_2 storage, how the CO_2 displaces hydrocarbons and formation waters, and the reactive surface area available for geochemical reactions that can trap CO_2 as a solid mineral phase. Therefore, the characterization of the transport of CO_2 through porous geologic formations is important to determining the capacity and form of CO_2 storage.
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