Numerical analysis of core-scale methane hydrate dissociation dynamics and multiphase flow in porous media
Numerical analysis of core-scale methane hydrate dissociation dynamics and multiphase flow in porous media
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DOI：
10.1016/j.ces.2016.07.035
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发表时间：
2016-10
影响因子：
4.7
通讯作者：
Lin Chen;H. Yamada;Y. Kanda;G. Lacaille;E. Shoji;J. Okajima;A. Komiya;S. Maruyama
中科院分区：
文献类型：
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作者：
Lin Chen;H. Yamada;Y. Kanda;G. Lacaille;E. Shoji;J. Okajima;A. Komiya;S. Maruyama
甲烷水合物是人类未来最有前途的能源之一。近年来，由于甲烷水合物广泛存在于多年冻土区和深海海底，甲烷水合物的提取、运输和利用日益受到重视。本研究提出了甲烷水合物在多孔介质中复杂多相分解流动的岩心尺度数值研究模型，是以往数值研究的延续和延伸。目前的数值模型侧重于降压过程和热边界效应，并讨论了核心尺度内部流动的参数效应和离解边界的控制因素。文中还对解离过程中解离锋运动和水冰平衡效应的新发现进行了分析。冰的形成和边界热传导限制被发现是甲烷气体顺利生产的关键。在此基础上，详细讨论了减压方法和热刺激方法的权衡和生产策略。希望这项研究能对相关的岩心尺度分析和可能的工程系统设计有所帮助。
Methane hydrate is one of the most promising future energy resources for humankind. In recent years, due to its vast existence in permafrost regions and deep ocean beds, increasing attention has been paid to the extraction, transportation and utilization of methane hydrate. The current study proposed core-scale numerical investigation models for the complex multiphase dissociation flows of methane hydrate inside porous media, which is a continuation and an extension of previous numerical investigations. The current numerical model focuses on the depressurization process and thermal boundary effects and discusses the parametric effects of the core-scale internal flows and controlling factors of the dissociation boundaries. The new findings with respect to the dissociation front movement and water–ice equilibrium effects during the dissociation process are also analyzed in this study. Ice formation and boundary heat conduction limitations are found to be critical for the smooth production of methane gas. Based on these results, trade off and production strategies for depressurization methods and thermal stimulation methods are also discussed in detail. It is hoped that this study will be useful for related core-scale analysis and possible engineering system designs.