Experimental Investigation of Methane Hydrate Reformation Under Dissociation Process

초록

Methane hydrate reformation was analyzed experimentally under the dissociation process. The authors investigated how the temperature and salinity of injected brine, and a hot-brine injection coupled with depressurization, affect methane hydrate reformation during dissociation. An experimental apparatus was constructed to dissociate the hydrate, which was to inject hot brine into in artificial hydrate-hearing sand column. The hydrate reformation could be recognized by observing a sharp increase of internal pressure. The salinity of hot brine was an effective factor in preventing hydrate reformation, while the temperature of hot brine played a minor role in the range of this study. The hot-brine injection that followed depressurization was more effective in inhibiting the hydrate reformation than the inverse case.

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