SS: Hydrates: Experimental results for long term CO2 injection near methane hydrate formations

Abstract

CO2 has been focused for improving recovery factor of methane hydrate. The most of the principle is replacing guest molecular. It is also known that CO2 hydrate formation generates a large amount of exothermic heat. This heat can warm sediments up to 10 degrees Celsius as one of heating method. But a problem is how to inject CO2 at near fields of methane hydrate formations. CO2 hydrate formed in sediment blocks the pore of sediments. Then CO2 cannot inject into sediments for about ten-year term. But it is possible to inject CO2 for long term by a thermo-dynamic principle of the stability zone of CO2 hydrate. We will present experimental results to prove the principle of CO2 injection into formations.