In-situ observation of MH formation/decomposition in unconsolidated sands recovered from the South China Sea

Methane hydrates (MH) have been viewed as an important potential energy resource. Assessments about the MH formation and dissociation behavior in porous deposits which are consistent to in-situ reservoir conditions are essential for the safe and efficient production of natural gas hydrates in submar...

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Bibliographic Details
Published inEnergy procedia Vol. 158; pp. 5433 - 5438
Main Authors Sun, Ronghui, Fan, Zhen, Yang, Mingjun, Zhao, Jiafei, Song, Yongchen
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2019
Subjects
dissociation
formation
host materials
interactions
methane hydrates
methane hydrates
formation
host materials
dissociation
interactions
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Summary:Methane hydrates (MH) have been viewed as an important potential energy resource. Assessments about the MH formation and dissociation behavior in porous deposits which are consistent to in-situ reservoir conditions are essential for the safe and efficient production of natural gas hydrates in submarine sediments. In this study, the formation and decomposition behavior of MH in unconsolidated sands recovered from the South China Sea were investigated by the charge-coupled-device (CCD) camera visualization. Deformation of the sediment was observed during both MH formation and decomposition processes. The experimental results indicated that the interactions between MH and the host porous materials during the phase-transition processes could play an important role for the deformation of the sediment. Thus, further studies are needed.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2019.01.605