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现代地质 ›› 2015, Vol. 29 ›› Issue (5): 1180-1188.

• 天然气水合物调查评价专辑 • 上一篇    下一篇

青海聚乎更钻探区天然气水合物拉曼光谱特征

孟庆国1,2，刘昌岭1,2，李承峰2, 贺行良2，王菲菲3，卢振权4，文怀军5，李永红6，王伟超6   

  1. (1.中国地质科学院， 北京100037；2.国土资源部天然气水合物重点实验室 青岛海洋地质研究所，山东 青岛266071； 3.中国地质大学(武汉)地球科学学院，湖北 武汉430074；4.中国地质调查局油气资源调查中心，北京100029； 5.青海煤炭地质局，青海 西宁810001；6.青海煤炭地质一0五勘探队，青海 西宁810007)
  • 出版日期:2015-10-29 发布日期:2015-12-24
  • 通讯作者: 刘昌岭，男，研究员，1966年出生，海洋地质专业，主要从事天然气水合物研究工作。 Email: qdliuchangling@163.com。
  • 作者简介:孟庆国，男，助理研究员，1983年出生，地质工程专业，主要从事天然气水合物研究工作。 Email: mengqimg@126.com。
  • 基金资助:

    国家自然科学基金项目(41302034, 41406076)。

Raman Spectroscopic Characteristics of Natural Gas Hydrates from Juhugeng Drilling Area, Qinghai

MENG Qing-guo1, 2, LIU Chang-ling1, 2, LI Cheng-feng2, HE Xing-liang2, WANG Fei-fei3, LU Zhen-quan4，WEN Huai-jun5，LI Yong-hong6，WANG Wei-chao6   

  1. (1.Chinese Academy of Geological Sciences, Beijing100037, China; 2.Key Laboratory of Gas Hydrate, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao, Shandong266071, China; 3.Earth of Earth Sciences,China University of Geosciences, Wuhan, Hubei430074, China; 4.Oil & Gas Survey, China Geological Survey, Beijing100029, China; 5.Qinghai Bureau of Coal Geology, Xining, Qinghai810001, China；6.Qinghai No.105 Coal Geological Exploration Team, Xining, Qinghai810007, China)
  • Online:2015-10-29 Published:2015-12-24

PDF (PC)

1030

被引次数

3

摘要：

了解天然气水合物的微观结构特征对水合物资源勘探和评价具有重要意义。采用显微激光拉曼光谱技术，对青海聚乎更钻探区内DK8-19、DK11-14 和DK12-13等3个站位共9个天然气水合物岩心样品进行了分析测试，探讨了钻探区天然气水合物的拉曼光谱特征。结果表明，青海聚乎更钻探区天然气水合物广泛分布，垂直方向在126.1~322.2 m范围内不连续分布，不同钻孔、不同埋深水合物样品的拉曼光谱特征基本一致，初步判断为Ⅱ型结构水合物，且为多元气体水合物。水合物客体除甲烷、乙烷、丙烷及丁烷等 烷烃外，普遍含有氮气组分。此外，在DK8-19站位埋深为126.1 m样品中发现水合物相中硫化氢组分的拉曼信号，这说明特定区域内可能存在硫化氢气体且形成了水合物。聚乎更钻探区水合 物样品拉曼光谱特征为冻土区天然气水合物成藏与分布规律研究提供了新的启示。

关键词: 聚乎更钻探区, 天然气水合物, 显微激光拉曼光谱, 永久冻土区, 结构特征

Abstract:

The structure characteristics of natural gas hydrates play a significant role in the exploration and evaluation of natural gas hydrate resource. In this paper, the hydrate samples, recovered from DK8 -19, DK11-14 and DK12-13 holes in the Juhugeng drilling area in Qinghai, were investigated by micro-Raman spectroscopy for the structure characteristics. The results show that gas hydrates are widely distributed in the Juhugeng drilling area. In the vertical direction, gas hydrate are distributed discontinuously between the depth of 126.1 and 322.2 m. The Raman characteristics of gas hydrates from the three sites with different depths are almost the same, and show structure Ⅱ hydrate with various gas molecules. Besides hydrocarbons such as CH4, C2H6, C3H8 and C4H10, N2 is generally observed in these gas hydrates samples. In addition, the Raman signals attributed to H2S in hydrate phase is found in the gas hydrate sample at depth of 126.1 m from DK8-19 hole, and it is the first time that H2S in hydrate phase is found in Qilian Mountain hydrates,suggesting that H2S gas molecules exist in some particular areas and gas hydrates form. The Raman spectroscopic characteristics of natural gas hydrates recovered from the Juhugeng drilling area may provide some new revelations for the study on the accumulation and distribution of gas hydrates located in the permafrost area in Qinghai.

Key words: Juhugeng drilling area, natural gas hydrate, laser micro-Raman spectroscopy, permafrost area, structure characteristic

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