Regional gas hydrate assessment techniques and long-time monitoring studies

区域天然气水合物评价技术及长期监测研究

• 批准号: 342337-2007
• 负责人: Riedel, Michael
• 金额: $ 1.84万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=399844
• 关键词: Regional; gas; hydrate; assessment; techniques

Naturally-occurring, ice-like gas hydrates form when gases (mainly methane) combine with water at low temperature and high pressure. These conditions are found in the sediment section on deep sea continental slopes where the water depth is greater than about 600 m, including offshore Vancouver Island and in permafrost regions of the Canadian Arctic. Natural gas hydrates represent a very large global reservoir of natural gas. Globally they are estimated to contain more organic carbon than all other fossil fuel sources combined. Gas hydrate is important because of its potential as a large source of future clean energy, but also because of potential risks associated with these deposits. These include the potential for a significant impact on climate change (methane is a strong greenhouse gas) and its role in seafloor stability hazard. The Canadian west coast has large and well-mapped occurrences of marine hydrate in the large subduction zone accretionary sedimentary prism on the continental slope. Large gas hydrate deposits are also known to occur in the Canadian Arctic, especially in the Mckenzie Delta at the Mallik site (NWT).

天然存在的冰状气体水合物是气体（主要是甲烷）在低温高压下与水联合收割机结合形成的。在水深超过约600米的深海大陆坡的沉积物部分，包括温哥华岛近海和加拿大北极的永久冻土区，都发现了这些情况。天然气水合物代表了非常大的全球天然气储层。在全球范围内，据估计，它们含有的有机碳比所有其他化石燃料来源的总和还要多。天然气水合物之所以重要，是因为它有可能成为未来清洁能源的一个重要来源，但也因为与这些矿床相关的潜在风险。其中包括对气候变化的潜在重大影响（甲烷是一种强烈的温室气体）及其在海底稳定性危害中的作用。加拿大西海岸在大陆坡上的大型俯冲带增生沉积棱柱体中有大量测绘良好的海洋水合物矿点。大型天然气水合物矿床也已知出现在加拿大北极地区，特别是在Mallik站点（NWT）的McKenzie Delta。