CO2 sequestration and cushion gas for geological storage

Abstract

The scientific and technological knowledge needed to activate a CO2/CH4 exchange into natural gas hydrate fields is presented. This exchange should permit the recovery of methane from natural gas hydrate, concomitantly capturing an equimolar amount of CO2 in the same field, thus providing for a permanent geologic storage thereof. This presentation covers the methods of underground storage of natural gas; the types of underground natural gas storage facilities, such as depleted oil and gas reservoirs, salt caverns, mines, aquifers, and hard-rock caverns; and geosciences, gas storage geomechanics, and reservoir engineering. This is an abstract of a paper presented at the International Gas Union World Gas Conference (Buenos Aires, Argentina 10/5-9/2009).