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现代地质 ›› 2005, Vol. 19 ›› Issue (1): 96-100.

• 天然气水合物实验研究 • 上一篇    下一篇

海洋天然气水合物元素地球化学异常的实验研究

刘昌岭1,2. 陈敏1. 业渝光1,2.   

  1. 1中国海洋大学 海洋地球科学学院,山东 青岛266003;
    2青岛海洋地质研究所,山东 青岛266071
  • 收稿日期:2004-11-12 修回日期:2004-12-12 出版日期:2005-01-20 发布日期:2005-01-20
  • 作者简介:刘昌岭,男,研究员,博士研究生,1966年出生,海洋化学专业,主要从事天然气水合物模拟实验技术的研究工作。
  • 基金资助:

    国家高技术研究发展计划(“863”计划)天然气水合物探测技术课题(2001AA6110-20)

Experimental Study on Elemental Geochemical Anomaly during the Formation of Marine Gas Hydrates

LIU Chang ling1,2 ,CHEN Min1 , YE Yu guang1,2   

  1. 1College of Marine Geology, Ocean University of China, Qingdao, Shandong266003,China;
    2Qingdao Institute of  Marine Geology,Qingdao, Shandong266071,China
  • Received:2004-11-12 Revised:2004-12-12 Online:2005-01-20 Published:2005-01-20

摘要:

海洋天然气水合物在生成过程中会引起周围沉积物孔隙水中元素地球化学异常,这些异常是指示天然气水合物存在的重要标志。在自制的实验装置上,模拟了海洋天然气水合物的生成过程,对海水中各离子浓度的变化进行了初步研究。结果表明:在不同的反应条件下,水合物的生成对各离子浓度变化的影响不同。压力越大,耗气量越大,生成水合物的量就大、纯度高,其排盐效应也较强,导致海水溶液中离子浓度的增高,而水合物中离子含量却呈降低趋势。

关键词: 海洋天然气水合物, 地球化学异常, 离子浓度, 实验装置

Abstract:

The elemental geochemical anomaly of pore water in marine sediments during the formation of gas hydrate is a significant indication for marine gas hydrates in the deep sea floor. Based on the experimental apparatus made by ourselves,we simulate the formation process of marine gas hydrates in laboratory, and study the variations of ionic concentrations in seawater preliminarily. The results show that the effects of formation of gas hydrate on the variations of ionic concentrations are not alike in different experimental conditions. The higher the original pressure, the larger the gas consumption, and then higher purity and larger amount hydrates are formed, resulting in stronger salt-exclusion efficiency. Therefore, the ionic concentrations are higher in seawater solution, while lower in the hydrates responding to the original pressure.

Key words: marine gas hydrates, geochemical anomaly, ionic concentration, experimental apparatus

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