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阿尔金山南缘中侏罗统大煤沟组泥页岩发育,初步证实具有较好的页岩气生成和储集条件,但有利选区不落实,资源潜力不明.通过对研究区中侏罗统大煤沟组页岩厚度、有机质丰度、有机质成熟度、含气性和保存条件等特征的研究,结合目的层构造和埋深等条件,根据陆相页岩气有利区优选标准,在阿尔金山南缘中侏罗统大煤沟组优选出茫崖l号沟、清水河、黑石山和月牙山等4个页岩气有利区,总有效勘查面积为1 692.54 km2.利用含气页岩面积、厚度、密度和含气量等主要参数,评价了有利区页岩气资源潜力,其中茫崖l号沟有利区P50页岩气地质资源量为723.05× 108 m3,清水河有利区P50页岩气地质资源量为1 845.10×108 m3,黑石山有利区P50页岩气地质资源量为199.10×108 m3,月牙山有利区P50页岩气地质资源量为1 747.16×108 m3,合计P50页岩气地质资源量为4 514.41×108 m3,总体认为具有较好的页岩气资源潜力.“,”The shale characteristic of Dameigou Formation within southern margin of Altyn Tagh Mountains,such as organic matter abundance,thermal maturity,gas bearing capacity and preservation condition,have been analyzed based on geological background,shale distribution characteristic and the fundamental data of field outcrop,well core and typical cross section.In combination with structural environment and burial depth conditions of shale within target formation,No.1 Mangya,Qingshui River,Heishi Mountain and Yueya Mountain four favorable areas of shale gas have been selected.The total effective exploration areas of four favorable areas are 1 692.54 km2.According to some key evaluation parameters such as shale area,thickness of shale,density and gas content,the potential of shale gas resources have been evaluated.The total P50 resources are 4 514.41× 108 m3,which contain 723.05×108 m3 of No.1 Mangya favorable area,1 845.10×108m3 of Qingshui River favorable area,199.10 × 108 m3 of Heishi Mountain favorable area and 1 747.16 × 108 m3 of Yueya Mountain favorable area.Four favorable areas mentioned above show huge shale gas resources potential.