2-1-3 孔隙内ハイドレート再生成に関する実験的検討

抄録

To consider methane hydrate regeneration process, we conducted the methane hydrate formation experiments in artificial unconsolidated sandy cores. In experiments, pressure and temperature were measured during methane hydrate growth inside pore space. The moles of methane hydrate were calculated from gas uptake and mass balance. In addition, we measured pore scale morphology of gas/water/sand interface by using micro-focus X-ray computed tomography. According to the results, the methane hydrate growth processes can be divided into some stages, and hydrate regeneration is easily to occur when a system becomes hydrate stable condition.