中国冻土区天然气水合物的地球化学调查

Geochemical Investigation of Gas Hydrate in the Permafrost Area,China

天然气水合物是一种极具潜力的新型能源,中国陆域永久冻土区天然气水合物资源具有极大的潜力。本文根据中国地质调查局在祁连山地区、羌塘盆地和漠河盆地天然气水合物远景区取得的大量地球化学调查数据和成果,分析总结了冻土区的温压条件、冻土条件、气源条件等,探讨了冻土区天然气水合物的成矿机制和制约因素,初步建立了冻土区天然气水合物的成藏模式,以期为下一轮的冻土区天然气水合物勘查提供地球化学技术支撑。

Natural gas hydrate is a new type of energy with great potential.Natural gas hydrate resources in the permafrost areas of China have great potential.In this contribution,based on a large number of geochemical survey data and results obtained by the China Geological Survey of natural gas hydrate prospects in the Qilianshan area,the Qiangtang Basin and the Mohe Basin,we summarized conditions of temperature,pressure,frozen soil and gas source of the frozen soil areas and discussed the natural gas hydrate mineralization mechanism and constraints in the frozen soil areas.An accumulation model of natural gas hydrates in frozen soil areas was established preliminarily to provide geochemical and technical supports for the next round of natural gas hydrate exploration in the frozen soil areas of China.