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化工学报  2014 

不同饱和度的天然气水合物降压分解实验

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Keywords: 水合物,多孔介质,分离,降压,饱和度

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Abstract:

天然气水合物作为一种新能源已得到世界各国的关注,降压是水合物藏的一种有效开采方式。采用自制的天然气水合物开采模拟实验装置,在多孔介质中生成不同饱和度的天然气水合物,之后进行缓慢降压开采实验。结果表明:降压开采可分为自由气产出、水合物降压分解产气和最后降压产出已分解气三个阶段。在降压分解阶段,当水合物饱和度从16%增加到48%时,平均产气速率先增加后减小,说明水合物饱和度对降压分解产气速率的影响是非线性的。降压分解时,水合物饱和度越大,温度下降幅度越大。实验研究范围内,中等饱和度(32%)的水合物藏降压分解产气速率比较大,降压开采效果较好。

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