收稿日期: 2004-07-05
修回日期: 2004-08-14
网络出版日期: 2004-10-20
基金资助
国家自然科学基金项目(编号：50176051)，中科院知识创新重要方向项目(编号：KGCX2-SW-309，KGCX-SW-304)联合资助。
THE RESEARCH OF THE ORIGIN MECHANISM OF MARINE GAS HYDRATE
Received date: 2004-07-05
Revised date: 2004-08-14
Online published: 2004-10-20
综述了国内外对天然气水合物成因机理的研究现状和天然气水合物的气体成因类型。重点探讨了海底之下天然气水合物的形成机理,提出了强渗漏和弱渗漏系统的概念和分析了基于这两种系统的水合物形成模式和特点。认为:强渗漏系统是指海洋底部由地壳构造活动产生的挤压或拉伸等变形作用,或者由于海洋沉积物的侧向挤压变形作用而出现断层,许多圈闭的烃类气体由此向上渗流并大量漏出,形成较稳定的水合物形成所需的气源,该系统形成的天然气水合物分布集中,储量密度大,具有实际开采价值;弱渗漏系统是指以甲烷为主的烃类气体由微生物和热作用生成后散布于原地的海底之下较为松散的多孔沉积物中,这些沉积物因温压变化可形成天然气水合物,但这类水合物分布分散,不能成藏,不利于开采。另外还探讨了我国南海天然气水合物成藏的可能性。
樊栓狮，刘锋，陈多福 . 海洋天然气水合物的形成机理探讨[J]. 天然气地球科学, 2004 , 15(5) : 524 -530 . DOI: 10.11764/j.issn.1672-1926.2004.05.524
Marine gas hydrates and their resource distributions were introduced and analyzed. The origin mechanism of Gas Hydrates were also reviewed. Furthermore, Two formation modes named "Strong Seepage" and "Feeble Seepage" systems of Marine Gas Hydrates were proposed. The characteristic of the two modes were pointed out and discussed. Finally, Marine gas hydrates in South China Sea based on "Strong Seepage" mode were investigated.
Key words： Marine gas hydrates; Origin; strong seepage; Feeble seepage.
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