【摘要】 以高分辨率层序地层学理论为指导,综合利用岩心、测井、地震和古生物等资料,结合邵伯次凹区域地质背景,对戴南组进行高分辨率层序地层划分,在此划分方案基础上对深凹带沉积特征进行了系统剖析,识别出扇三角洲、近岸水下冲积扇、湖底"扇"和辫状河三角洲4种沉积朵体,并对各自的亚(微)相特征进行了详细刻画,探讨演化规律,建立了深凹带沉积朵体的沉积模式,为研究区的下一步油气勘探开发提供有力的地质依据。更多还原

【Abstract】 Based on the core,logging,seismic and paleontological data and the geological background of Shaobo sub-sag,the sequence stratigraphy of Dainan Formation is divided using sequence stratigraphy theory as guidance. On the basis of the high-resolution stratigraphic sequence division,four types of depositional lobes,including fan delta,nearshore subaqueous alluvial fan,sublacustrine fan and braided river delta,are recognized by the systematical analysis of the depositional characteristics of Shaobo sub-sag,and their subfacies(microfacies) are characterized. The evolution features of the depositional lobes are studied and the sedimentary modes of the depositional lobes in Shaobo sub-sag are established. The study provides sufficient geological evidence for the future oil and gas exploration and development in this region.更多还原