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海底水合物矿藏降压开采与甲烷气体扩散过程的数值模拟
Authors
刘怡君
张郁
+4 more
李刚
李小森
陈朝阳
陈琦
Publication date
1 January 2010
Publisher
Abstract
在深海条件下采用单井降压法开采的天然气水合物矿藏中,利用TOUGH+HYDRATE软件对其开采过程和甲烷气体扩散过程进行数值模拟。物理模型由上至下依次为上盖层、水合物沉积层和下盖层。将上、下盖层外边界的温度设为恒定,与含水合物沉积层之间有热量和质量交换,数值模型采用二维圆柱坐标网格。模拟结果表明开采过程中井口产气速率是一个升高—降低—波动升高的过程,水合物分解产生的气体有一部分通过上盖层溢出,能在一定程度上增加大气中温室气体的量。开采初期水合物分解速率降低的主要原因是水合物分解产生的甲烷气体在地层中大量累积,开采后期水合物分解速率产生波动的主要原因是发生"气穴现象"。井口附近由于压力变化较快水合物分解最为剧烈,其附近有个低温区存在。上、下盖层附近水合物分解速率也较快
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Institutional Repository of GuangZhou Institute of Energy Conversion, CAS
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oai:ir.giec.ac.cn:344007/30420
Last time updated on 04/12/2021
Institutional Repository of GuangZhou Institute of Energy Conversion, CAS
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ir.giec.ac.cn:344007/20494
Last time updated on 05/12/2019
Institutional Repository of GuangZhou Institute of Energy Conversion, CAS
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ir.giec.ac.cn:344007/20492
Last time updated on 05/12/2019