Experimental Research of Methane Hydrate Phase Transformation in Porous Media

• 责任者：Chen Qiang (College of Marine Geosciences ; Ocean University of China ; Qingdao 266100 ; China) ; Ye Yuguang
• 刊名：Geoscience
• 出版年：2010
• 卷期：24(5)
• 关键词：天然气水合物 ; gas hydrates ; 多孔介质 ; porous medium
• 页码：p.972-978
• 图表：8 illus., 5 tables, 20 refs.
• 分类号：1003
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

In this paper, a well-designed apparatus was used to study the hydrate formation and dissociation process. The result reveals that hydrate formation is controlled by subcooling degree and gas saturation. When the gas supply is enough, hydrates will be formed more easily in cooler region. Otherwise, it will be synthesized in high gas saturation place. The phase transformation of hydrates will cause the dielectric constant variation of sediments, and through the time domain reflection method, the hydrate saturation can be calculated. The stability of gas hydrate is obviously influenced by thermal stimulation, and the heat transportation efficiency of sediments is a quadratic function to heating source.