| 天然气水合物研究中的几个重要问题 |
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| 引用本文： | 张俊霞,任建业.天然气水合物研究中的几个重要问题[J].地质科技情报,2001,20(1):44-48. |
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| 作者姓名： | 张俊霞 任建业 |
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| 作者单位： | 中国地质大学, |
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| 基金项目： | 973项目! ( G2 0 0 0 0 46 70 0 ) |
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| 摘 要： | 综述了当前关于天然气水合物研究中的几个重要问题，提出了今后的主要研究方向，全球大约有10^19g碳以天然气水合物的形式储存在沉积物中，大约是其它所有化石燃料沉积物形式储存量的2倍多，因此，天然气水合物被认为是21世纪具有商业开发无景的潜在的战略资源，天然气水合物是一种亚稳态物质，极易受到温度和压力条件的影响，海底天然气水合物的分解将会影响沉积物的物理化学性质（如剪切强度和流变性等），地球物理性质（如地震波速和电导性），以及地球化学性质（如孔隙流体成分）的明显变化，导致诸如海底滑塌等地质灾害的发生，天然气水合物的分解会产生导致“温室效应”的甲烷气体，该气体进入大气圈中会引起全球气候和环境的变化。
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| 关 键 词： | 天然气水合物 潜在能源资源 海底滑塌 温室效应 海洋 沉积物 甲烷 |
| 文章编号： | 1000-7849(2001)01-0044-05 |
| 修稿时间： | 2000年7月7日 |
SEVERAL IMPORTANT PROBLEMS IN THE RESEARCH OF GAS HYDRATES |
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| Zhang Junxia,Ren Jianye.SEVERAL IMPORTANT PROBLEMS IN THE RESEARCH OF GAS HYDRATES[J].Geological Science and Technology Information,2001,20(1):44-48. |
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| Authors: | Zhang Junxia Ren Jianye |
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| Abstract: | Three important aspects in the present researches on gas hydrate,their fossil fuel resource potential,their role as a submarine geohazard,and their effects on global climate change,have been summarized and future research targets have been presented in this paper.The total amount of methane in gas hydrates is likely to be up to 1019g of methane carbon,which is 2 times larger than the carbon present in all known fuel deposits:coal,oil and natural gas.Therefore,gas hydrate is considered as the potential strategy resources with industry value during the 21st century.Because gas hydrates are metastable,changes of pressure and temperature may easily affect their stability.Breakdown of gas hydrates in gas hydrates-containing sediments may affect the physical/chemical properties of sediments such as shear strength and flow,geophysical properties such as acoustic velocity and resistivity,and geochemical properties such as pore fluid compositions,which may lead to geological hazards in the form of gravitational slid collapse or slumps on seafloor.Decomposition of gas hydrates may also release methane,a strong “greenhouse”gas,into the atmosphere,causing the change of global climate and environments. |
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| Keywords: | gas hydrate potential fuel resources seafloor slump greenhouse |
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