EXPLOITATION OF CH4 HYDRATES UNDER THE NANKAI TROUGH IN COMBINATION WITH CO2 STORAGE

The hydrate field under the Nankai Trough having a large amount of CH4 deposits has become the object of public attention as a potential gas resource. The possibility of exploitation of CH4 hydrate is examined thermodynamically in likage with the environmental problem of CO2 storage. The CO2 supplied to the hydrate field can dissociate the CH4 hydrate and is finally stored there as CO2 hydrate.