ABSTRACT
Global warming, observed since the beginning of the industrial revolution (Marchetti 1977), is being attributed largely to the accumulation of anthropogenic CO2 in the Earth's atmosphere. Among the many solutions posed to reduce further emissions and to remediate the existing problem, capture and storage of CO2 in geologic formations is one of the most promising approaches. CO2 can be sequestered in geologic media: (1) through injection of CO2 associated with enhanced oil recovery; (2) by storage in depleted oil and gas reservoirs; (3) through replacement of absorbed methane by CO2 in deep coalbeds; (4) by injection into deep saline aquifers, as demonstrated at the Sleipner gas field in the Norwegian North Sea, (5) through storage in salt caverns; and (6) by replacement of CH4 in seafloor clathrate hydrates (Yezdimer et al. 2002).
