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地球学报  2010 

祁连山冻土区天然气水合物及其基本特征

DOI: 10.3975/cagsb.2010.01.02

Keywords: 天然气水合物,冻土,祁连山

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Abstract:

2008年11月5日,由中国地质科学院矿产资源研究所、勘探技术研究所和青海煤炭地质局105勘探队施工的“祁连山冻土区天然气水合物科学钻探工程”DK-1孔取得重大突破,成功钻获天然气水合物实物样品。这是我国冻土区首次钻获并检测出的天然气水合物实物样品,也是世界上第一次在中低纬度高原冻土区发现的天然气水合物,具有重要的科学、经济和环境意义。目前钻获的天然气水合物均产于冻土层之下,产出深度133~396m,其层位属于中侏罗统江仓组。水合物以薄层状、片状、团块状赋存于粉砂岩、泥岩、油页岩的裂隙中,或以浸染状赋存于细粉砂岩的孔隙中。祁连山冻土区天然气水合物具有埋深浅、冻土层薄、气体组分复杂、以煤层气为主等特征,应是一种新类型水合物。

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