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论文类型：期刊论文

发表时间：2015-11-01

发表刊物：JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：27

页面范围：1814-1820

ISSN号：1875-5100

关键字：Gas hydrate; Seepage; Hydrate exploration; Reformation

摘要：Methane hydrate (MH) is a clean energy source with significant potential. However, the hydrate formation/reformation characteristics during the natural gas hydrate (NGH) exploration process must be elucidated. In this study, methane hydrate was formed/reformed in three different modes to simulate the mining of NGH sediment. The experimental results indicated that when the hydrate forms in partly water saturated porous medium in a flow of methane gas, the methane gas flow rate does have a significant effect on hydrate saturation. Hydrate could be formed in larger amounts and faster by the methane displacement of the water-saturated porous medium than in any other experimental mode. However, the pressure curves fluctuated strongly in this mode. When the hydrate was reformed at a constant pressure in partly water-saturated porous medium, the hydrate saturation maxima increased. However, when the hydrate was reformed by flowing methane through the partly water-saturated porous medium, the hydrate saturation maxima decreased. (C) 2015 Elsevier B.V. All rights reserved.