| 天然气水合物客体分子与同位素组成特征及其地球化学应用 |
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| 引用本文： | 贺行良,王江涛,刘昌岭,赵青芳.天然气水合物客体分子与同位素组成特征及其地球化学应用[J].海洋地质与第四纪地质,2012(3):163-174. |
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| 作者姓名： | 贺行良 王江涛 刘昌岭 赵青芳 |
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| 作者单位： | 中国海洋大学海洋化学理论与工程技术教育部重点实验室;国土资源部海洋油气资源与环境地质重点实验室;青岛海洋地质研究所 |
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| 基金项目： | 中国地质调查局地质调查项目(1212011120271);国土资源部公益性行业科研专项(201111026);国家自然科学基金项目(41072037) |
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| 摘 要： | 对1999—2011年间发表的全球18个地区(包括海洋、内陆海与湖泊、陆域冻土区)244件天然气水合物样品的气体分子与同位素组成数据进行了归纳与总结,结果发现:C1是自然界中天然气水合物的最主要组成成分,C2-C6烷烃和CO2也是其常见的客体分子,C6+、H2S等较少存在于水合物分解气中。海洋、内陆海与湖泊、陆域冻土区天然气水合物的客体分子种类存在一定的差异,且碳氢同位素的组成范围也比较宽泛。根据气体分子与同位素组成数据可有效判识天然气水合物的气体来源与成因类型,甚至在研究水合物形成与分解控制因素、气体迁移与成藏过程等方面也具有重要的指示作用。
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| 关 键 词： | 天然气水合物 气体分子与同位素组成 全球数据集 地球化学应用 |
GUEST MOLECULAR AND ISOTOPIC COMPOSITIONS OF NATURAL GAS HYDRATES AND ITS GEOCHEMICAL APPLICATIONS |
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| HE Xingliang,WANG Jiangtao,LIU Changling,ZHAO Qingfang.GUEST MOLECULAR AND ISOTOPIC COMPOSITIONS OF NATURAL GAS HYDRATES AND ITS GEOCHEMICAL APPLICATIONS[J].Marine Geology & Quaternary Geology,2012(3):163-174. |
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| Authors: | HE Xingliang WANG Jiangtao LIU Changling ZHAO Qingfang |
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| Institution: | 2,3 (1 Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China,Qingdao 266100,China; 2 Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Land and Resources,Qingdao 266071,China; 3 Qingdao Institute of Marine Geology,Qingdao 266071,China) |
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| Abstract: | A global dataset of molecular and stable isotope compositions of hydrate-bound gases from 244 samples in 18 representative regions(including seas,inland seas and lakes,permafrost)is presented and discussed,during 1999—2011.The results indicate that Methane(C1) is the most abundant hydrate-bound gas,while CO2 and C2 —C6 hydrocarbon gases are frequently present in small amounts.Other gases,such as C6+ and H2S,are uncommon.The kinds of guest molecules in gas hydrates from seas,inland seas,lakes and permafrost were different,and the stable isotope composition(δ13C and δD) of hydrate-bound gases varies significantly.In addition to the diagnosis of origins and sources of hydrate-bound gases,molecular and isotopic data can help to better study the control factors of formation and decomposition,and provide valuable insights into the gas migration and accumulation process of gas hydrate. |
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| Keywords: | natural gas hydrates gas molecular and isotopic compositions global dataset geochemical application |
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