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武威盆地发育厚度近千米的石炭系,具东厚西薄的特点,是一套海陆交互相碎屑岩、碳酸盐岩及含煤沉积。早石炭世早期前黑山组沉积时期,仅在盆地南部接受沉积,厚度为100~150 m,气候炎热干旱,以滨浅海和咸化泻湖环境为主,主要沉积了杂色碎屑岩,夹白云岩和石膏沉积,生油能力差;下石炭统上段臭牛沟组—上石炭统靖远组、羊虎沟组、太原组沉积时期,气候温暖湿润,海侵范围扩大,盆地内均有沉积,厚度为300~800 m,为滨浅海、滨海沼泽、淡化泻湖、三角洲环境,形成了暗色泥岩、页岩、炭质泥岩、灰岩烃源岩,盆地周缘石炭系烃源岩有机质丰度较高,属中等—好烃源岩,是盆地内主要的生油气源岩,发育自生自储式生储盖组合。综合分析表明武威盆地是一个有潜力的含油气盆地。
The Wuwei Basin has a thickness of nearly 1000 meters of Carboniferous, with the characteristics of the east and west thin, is a set of land-sea interaction clastic rocks, carbonate rocks and coal deposits. During the deposition of the Early Member of the Early Carboniferous, the Heishan Formation was only deposited in the southern part of the basin with a thickness of 100-150 m. The climate was hot and dry with mainly coastal shallow sea and saltwater lagoon environment, mainly consisting of mottled clastic rocks and white clouds Rock and gypsum deposition, poor oil generation ability; upper Cathaysian Upper Niu Niugou Formation - Upper Carboniferous Jingyuan Formation, Yanghugou Formation and Taiyuan Formation. During the depositional period, the climate was warm and humid, and the scope of transgression increased. Both sediments were deposited in the basin , With a thickness of 300-800 m. It is a coastal shallow sea, coastal marsh, desalination lagoon and delta environment, forming dark mudstone, shale, carbonaceous mudstone and limestone source rock. The organic matter abundance of the Carboniferous source rocks in the periphery of the basin is relatively High, is a moderate - good source rock, is the main source of oil and gas source rocks in the basin, the development of self-storage and reservoir-cap combination since. Comprehensive analysis shows that the Wuwei Basin is a potential petroliferous basin.