Abstract
CO_2 hydrate formation generates exothermic heat Thus, there is a possibility to warm the sand layers for production of methane hydrate by using the heat. We had experimentally obtained data by flowing CO_2/water emulsion into Toyoura sand In this paper, the number 7 silica sand is used as more realistic sub-seabed sediments. The results showed that temperature rise by some degree centigrade at the tip of the permeation of the emulsion. And the temperature approached gradually to the phase equilibrium of CO_2 hydrate with continuous flow. This shows a possibility of an enhanced recovery using CO_2.
