Behavior of gas hydrate formation in marine sediments for CO₂ sequestration

There are some proposals for CO₂ storage in underground structures, such as oil/gas reservoirs, aquifers, and sediments. One of the attractive methods of CO₂ sequestration is that the exhaust gas containing CO₂ is directly isolated in marine geological structure as a solid phase of gas hydrates. An experimental study on the formation behavior of CO₂ hydrate in sand layer simulated as marine sediments was carried out. The formation rate of CO₂ hydrate in sand layer was measured by Raman spectrometer and a bulk-scale experiment. Fundamental data toward CO₂ storage and sequestration in water unsaturated condition could be obtained. The mixed gas of CO₂ and N₂ was suitable for vast quantity of CO₂ storage. The sequestration of CO₂ would be possible because of its storage capacity and the permeability change in the sediments. This is an abstract of a paper presented at the 15th International Offshore and Polar Engineering Conference (Seoul, Korea 6/19/2005).