To provide a method and a system for producing a gas hydrate capable of efficiently decomposing the gas hydrate even under an environment in which there is water.
A gas hydrate-containing stratum 2 in a ground is cut and a winze 6 is excavated, a stratum cut article T in the winze 6 is irradiated with ultrasonic waves or electromagnetic waves and the gas hydrate GH is decomposed and a decomposition product gas G is recovered through the winze 6. Alternately, the winze 6 is excavated to the gas hydrate-containing stratum 2 in the ground, the stratum 2 is irradiated with the ultrasonic waves or the electromagnetic waves from the winze 6 and the gas hydrate GH in the stratum 2 is decomposed and the decomposition product gas G in the stratum 2 is recovered through the winze 6. The decomposition production gas G is separated and recovered preferably from the stratum cut article T after the decomposition or a gas hydrate decomposition product in the stratum 2 while a residue R after a gas separation is returned to the stratum 2. A frequency having the large energy loss of the gas hydrate and the small energy loss of water is used more preferably as the ultrasonic waves or the electromagnetic waves.
COPYRIGHT: (C)2005,JPO&NCIPI
Kenichiro Rouki
Michio Imai
Hisao Fujimura
Nobuhiro Fujii
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