Abstract—

The distinctive features of methane hydrate decomposition in gaseous and water media under the conditions of thermobaric phase instability of methane hydrates are considered. In the course of preceding field observations it has been established that methane hydrate decomposes significantly more rapidly in the water medium as compared with the gaseous methane medium. The basic idea consists in the fact that methane hydrate decomposition takes place inside methane hydrate fractures in which there are decomposition nuclei. Deceleration of methane hydrate decomposition is caused by the formation of ice plugs in the local zones of methane hydrate decomposition, namely, in the fractures. An ice plug is formed as a result of local methane hydrate decomposition into gas and water and intense heat consumption. In the process of freezing, water forms the plug and thereby blocks methane hydrate decomposition in the fracture. Relatively low heat conduction of gaseous methane protects the ice plugs against rapid melting.

中文翻译：

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气态介质中甲烷水合物自保存的力学模型

摘要-

考虑了甲烷水合物在热压相不稳定条件下在气态和水介质中甲烷水合物分解的显着特征。在先前的现场观察过程中，已经确定，与气态甲烷介质相比，甲烷水合物在水介质中的分解明显更快。基本思想在于，甲烷水合物分解发生在甲烷水合物裂缝内部，其中有分解核。甲烷水合物分解的减速是由于在甲烷水合物分解的局部区域即裂缝中形成冰栓引起的。由于局部的甲烷水合物分解成气体和水并消耗大量热量，形成了冰塞。在冻结过程中 水形成堵塞物，从而阻止裂缝中的甲烷水合物分解。气态甲烷的相对较低的热传导可防止冰块快速融化。