收稿日期: 2008-10-08
修回日期: 2009-01-08
网络出版日期: 2009-04-10
基金资助
中国海域天然气水合物资源调查评价专项项目(编号:G2H200200202);国家重点基础研究发展计划项目(编号:2009CB219503)联合资助.
Simulation Experiment of the Relationship between CO2 Hydrate Saturation and Resistance in Porous Media
Received date: 2008-10-08
Revised date: 2009-01-08
Online published: 2009-04-10
确定沉积物中天然气水合物饱和度是评估水合物资源、开发利用天然气水合物工作中的一项基础而关键的工作。利用青岛海洋地质研究所自主设计、研制的天然气水合物阻抗监测模拟实验装置,研究了CO 2气体与去离子水在多孔介质中天然气水合物的生成与分解过程。指出:天然气水合物生成过程会使多孔介质阻抗增大;天然气水合物分解过程导致多孔介质阻抗减小。并且多孔介质的阻抗变化与反应体系的温度压力变化相互对应,能够体现天然气水合物生成与分解各阶段的特点。此外,还利用Archie公式,使用天然气水合物的阻抗值计算多孔介质中水合物的饱和度,得到了多孔介质中天然气水合物饱和度随反应时间的增长曲线。
陈强 业渝光 孟庆国 刘昌岭 . 多孔介质中CO2水合物饱和度与阻抗关系模拟实验研究[J]. 天然气地球科学, 2009 , 20(2) : 249 -253 . DOI: 10.11764/j.issn.1672-1926.2009.02.249
In this paper, a gas hydrate electrical resistance monitor apparatus, which is designed by Qingdao Institute of Marine Geology, is used to analyze the CO2 gas hydrate formation and dissociation process. It is found that the electrical resistance of the porous media increases with hydrates formation and decreases with hydrate dissociation. The variation of electrical resistance is in good correlation with the temperature and pressure variation of the reaction system which can show the characteristics of the gas hydrate formation and dissociation process. Besides, the Archie′s law is introduced to calculate the hydrate saturation in porous media through the electrical resistance, and a graph of hydrates saturation versus reaction time is shown.
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