Formation and Dissociation of Methane Hydrate in Different Occurrences in Sand
Received date: 2013-03-25
Revised date: 2013-05-29
Online published: 2013-12-10
To study the effect of the occurrences on the formation and dissociation of methane hydrate in sediment,the formation and dissociation experiments of methane hydrate in four different occurrences in sand,including massive,layered,nodular and disseminated,were conducted.The results showed that the effect of occurrences on the formation and dissociation of methane hydrate was evident and clear.The conversion rate of methane was highest in massive,lower in layered and disseminated,lowest in nodular.The methane hydrate formed fastest in the state of disseminated whose peak of methane conversion rate was highest,too.It took relatively the longest time for massive methane hydrate to form,secondly for layered,thirdly for nodular,and shortest for disseminated.It also showed that in dissociation process,the stabilization of massive methane hydrate was the best,secondly was layered,thirdly was nodular,and the stabilization of disseminated methane hydrate was the worst.
Key words： Methane hydrate; Sand; Occurrence; Formation; Dissociation
JIANG Guan-li,WU Qing-bai,YANG Yu-zhong,ZHAN Jing . Formation and Dissociation of Methane Hydrate in Different Occurrences in Sand[J]. Natural Gas Geoscience, 2013 , 24(6) : 1305 -1310 . DOI: 10.11764/j.issn.1672-1926.2013.06.1305
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