极地研究

极地研究 ›› 2019, Vol. 31 ›› Issue (3): 309-321.DOI: 10.13679/j.jdyj.20180065

• 研究论文 • 上一篇    下一篇

北极阿拉斯加北坡盆地天然气水合物成矿规律与资源潜力

杨楚鹏1  刘杰2  杨睿3  胡小三1  姚永坚1  王哲1  李学杰1   

  1. 1.自然资源部中国地质调查局广州海洋地质调查局, 广东 广州 510760;
    2.中国科学院广州能源研究所, 广东 广州 510000;
    3.自然资源部中国地质调查局青岛海洋地质研究所, 山东 青岛 266071
  • 收稿日期:2018-11-20 修回日期:2018-12-15 出版日期:2019-09-30 发布日期:2019-09-30
  • 通讯作者: 杨楚鹏
  • 基金资助:

    中国地质调查局地质调查项目(DD20190577)资助

Occurrence and resource potential of gas hydrate in the Alaska North Slope Basin of the Arctic

Yang Chupeng1, Liu Jie2, Yang Rui3, Hu Xiaosan1, Yao Yongjian1, Wang Zhe1, Li Xuejie1   

  • Received:2018-11-20 Revised:2018-12-15 Online:2019-09-30 Published:2019-09-30

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摘要：

北极阿拉斯加北坡盆地是全球开展天然气水合物的调查研究最早的地区之一, 对全球天然气水合物的研究具有示范作用。在大量文献资料综合分析的基础上, 本文系统归纳了阿拉斯加北坡地区天然气水合物的成矿地质条件和成矿规律。认为阿拉斯加北坡的天然气水合物成矿系统是下伏下白垩—第三系含油气系统在浅部的衍生, 是由下伏气源、断裂、岩性、北极的特殊环境(永久冻土、地层温压场)等多种因素共同作用的结果。通过模拟计算和分析, 将阿拉斯加北坡地区划分了3级远景资源区, 估算出整个阿拉斯加地区的天然气水合物资源为6.0×1012 m3标准天然气, 其中I级远景区主要分布于阿拉斯加北坡的滨岸冻土区和陆架区, 资源量为2.83×1012 m3标准天然气。

关键词: 阿拉斯加北坡盆地, 天然气水合物, 成矿模式, 资源潜力

Abstract:

The Alaska North Slope Basin (ANSB) is one of the earliest areas for gas hydrate investigation and research in the world, and it has an exemplary role in global gas hydrate studies. In this work, the metallogenic geological conditions and regularities of natural gas hydrates in the ANSB were summarized systematically by means of literature-based research and analysis. It is believed that the gas hydrate system of the ANSB is a shallow derivation of the underlying Cretaceous–Tertiary petroleum system, which is the result of multiple factors including gas sources, faults, lithology and the special environment (i.e., permafrost, stratum temperature and pressure field). Based on the above inference, three levels of prospective resource areas in the ANSB were determined using simulation calculations, and the gas hydrate resource in the entire Alaska area was estimated to be 6.0 × 1012 m3 standard natural gas. Overall, the Class I prospective areas are distributed mainly in the coastal permafrost and shelf areas of the ANSB, and their resource potential was estimated to be 2.83 × 1012 m3 standard natural gas.

Key words: Alaska North Slope Basin, gas hydrate, mineralizing pattern, resource potential