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论文类型：期刊论文

发表时间：2020-02-01

发表刊物：FUEL

收录刊物：EI、SCIE

卷号：261

ISSN号：0016-2361

关键字：Methane hydrate; Low field NMR; Formation; Hydration number

摘要：Methane hydrate is an important energy source and a good form of methane storage and transportation. The limit of gas storage capacity in hydrates is still not clear. In this study, we employed a low-field nuclear magnetic resonance to study the gas-water consumption characteristics quantitatively at various formation conditions. Nine methane hydrate formation experiments of different temperatures pressures were conducted in porous media. The consumption of gas and water for hydrate formation displayed as asynchronous trend, due to the change in hydrate cage occupancy. The results indicated that higher pressures or lower temperatures improved both the amount of hydrate formation and the cage occupancy of hydrate. In addition, the driving forces affected the formation of methane hydrate more obviously under a lower temperature. Ultimately, the hydration number of methane hydrate under different driving forces were determined. This study is of great significance to the estimation of hydrate and gas capacity in the hydrate based technology application in methane storage and transportation.