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针对青海南祁连木里天然气水合物发现区分布的晚三叠世尕勒得寺组和早中侏罗世不同类型烃源岩的地质特征和烃源岩地化特征进行了初步分析。研究结果表明,晚三叠世尕勒得寺组烃源岩主要以暗色泥岩、碳质泥岩及煤为主;早中侏罗世窑街组烃源岩主要以暗色泥岩、页岩及煤为主。其中窑街组暗色泥岩、页岩具有较高的有机质丰度、生烃潜量,成熟度以低成熟-成熟为主,有机质类型主要为Ⅱ2、Ⅲ型,是好-较好的烃源岩,为该地区天然气水合物形成的最主要气源岩。
Geological characteristics and geochemical characteristics of source rocks of different types of source rocks in the Late Triassic Galeoti Formation and Early Middle Jurassic are distributed in the discovery zone of Muli gas hydrate in southern Qilian, Qinghai. The results show that the source rocks of the Late Triassic Galerdijisi Formation are dominated by dark mudstone, carbonaceous mudstone and coal. The source rocks of Yajie Formation in early Middle-Middle Jurassic are mainly dark mudstone, shale and coal the Lord. The dark mudstones and shale in Yaojie Formation have high abundance of organic matter, hydrocarbon generation potential and low maturity and maturity. The organic matter types are mainly Type II and III, which is a good and better source rock , Which is the most important source rock of gas hydrate formation in this area.