极地研究

极地研究 ›› 2013, Vol. 25 ›› Issue (3): 241-248.DOI: 10.3724/SP.J.2013.00241

• 研究论文 • 上一篇    下一篇

南极陆缘热流分布与天然气水合物资源量研究

王力峰 邓希光 沙志彬 吴庐山 杨永   

  1. 广州海洋地质调查局，广东 广州 510760
  • 收稿日期:2013-01-21 修回日期:2013-02-20 出版日期:2013-09-30 发布日期:2013-09-30
  • 通讯作者: 王力峰
  • 基金资助:

    国土资源部国家专项项目;国土资源部全球油气地质综合研究与区域优选专项

RESEARCH ON HEAT FLOW DISTRIBUTION AND GAS HYDRATEECONOMIC POTENTIAL IN ANTARCTICA MARGINS

Wang Lifeng，Deng Xiguang，Sha Zhibin，Wu Lushan，Yang Yong   

  1. Guangzhou Marine Geological Survey, Guangzhou 510760, China
  • Received:2013-01-21 Revised:2013-02-20 Online:2013-09-30 Published:2013-09-30

PDF (PC)

1438

被引次数

5

摘要： 近期系统的研究表明南极陆缘存在众多有利于天然气水合物赋存的指示性标志，尤其在陆缘周围的盆地中发现多条相关的地球物理反射层；同时，物源、温压、构造和沉积条件，皆有利于来自下部烃类气体的运移、富集和成藏，形成适合天然气水合物赋存的构造环境。在此基础上，利用收集的地热数据库，首先描述了陆缘周围的热流分布状况，再次计算了天然气水合物稳定带的厚度，最后利用体积分方法初步估算了该区域的天然气水合物的前景资源量。结果表明虽然陆缘周围的热流值相对较高，平均值达85.9 mW·m-2，但是由于陆缘海水深度大，形成足够强的压力，保证了天然气水合物的稳定赋藏，由此计算的前景资源量为0.97－1.63×1013 m3，表明具有可观的经济价值。

关键词: 天然气水合物, 南极陆缘, 热流, 稳定带厚度, 前景资源量

Abstract: Recent systematical studies show that natural gas hydrate reservoirs identified by the presence of many characteristic geophysical indicators, are highly likely to occur in the continental margins of Antarctica. At the same time, the factor evaluation of several geological conditions which include pressure and temperature, tectonics and sedimentation, are favorable for the hydrocarbon containing fluid migration and the gas hydrate accumulation. So based on the previous scientific background information and heat flow dataset acquired from IHFC (International Heat Flow Commission), we describe the heat flow distribution, analyze the possible gas hydrate thickness and then estimate gas hydrate amount by using the volumetric integration. The result shows that while the average heat flow in Antarctica continental margins is 85.9 mW/m2, higher than the values in the other else gas hydrate sites, the pressure caused by the massive water depth ensures the stabilization of gas hydrate in the sediments. The total volume of gas hydrate estimated, in Antarctica continental margins region of about ~106 km2 extension, is in a range of 0.97×1013–1.63×1013 m3, a considerable economic potential for future energy utilization.

Key words: gas hydrate, Antarctica margins, heat flow, hydrate stability zone, economic potential