SO2 impurity impacts on experimental and simulated CO2-water-reservoir rock reactions at carbon storage conditions

摘要

Some industrial CO2 streams stored geologically may contain impurities including SO2, O-2, and NOX. The impacts of these reactive gases in CO2-water-rock interactions have received limited attention relative to pure CO2 studies. An experimental and geochemical modelling study of reservoir and cap-rock core samples from a potential CO2 storage site in the Surat Basin, Queensland, Australia is described. Reservoir and cap-rock samples were reacted with low salinity fluid saturated with an impure CO2 stream containing 0.16% SO2 at reservoir simulated in situ conditions. This study is relevant to the storage of impure CO2 streams from industrial sources in sandstone reservoirs.