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利用沉积学方法分析了穆格莱德盆地的沉积充填与油气勘探问题。研究表明 :该盆地发育冲积、扇三角洲、三角洲、湖泊和深水浊积岩相等 5种沉积相 ,分别构成河流 -三角洲 -湖泊和扇三角洲 -湖泊等两大沉积体系 ;主要烃源岩发育在下白垩统 AG组 ,该组上部以砂岩为主 ,生烃潜力差 ,下部主要是干旱气候期的沉积 ,生烃潜力亦差 ;AG组中部以暗色泥页岩沉积为主 ,发育在成盆早期 ,为中 -深湖泊沉积 ,但分布较为局限 ;该段地层厚 2 0 0 0 m,60 %以上为暗色泥、页岩 ,是穆格莱德盆地油气勘探的主力层位
Sedimentary methods were used to analyze sedimentary filling and hydrocarbon exploration in the Muglad Basin. The results show that there are five kinds of sedimentary facies such as alluvial, fan delta, delta, lake and turbidite in the basin, forming two sedimentary systems of river delta delta lake and fan delta lake respectively. The main source rocks are developed in lower Cretaceous In the AG group, the upper part of this group is dominated by sandstone with poor hydrocarbon generation potentials. The lower part is mainly arid climate, and the potential for hydrocarbon generation is also poor. The middle part of the AG group is dominated by dark shale deposits and developed in the early basin, It is a medium-deep lacustrine sedimentation, but its distribution is rather limited. This section is 20000 m thick and over 60% is dark mud and shale. It is the main reservoir for oil and gas exploration in the Muglad Basin