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以沧东凹陷古近系孔店组一段为目的层段,利用岩心识别了沉积构造、岩性组合特征和沉积微相,借助轻矿物资料开展了物源体系分析,利用钻井砂岩厚度分析砂体空间分布规律。综合分析表明,沧东凹陷孔一段主要发育块状构造、交错层理等辫状河道砂坝沉积,受四大物源体系的控制即东部徐杨桥物源和孟村物源、西部舍女寺物源、北部孔店物源,在沧东凹陷的西部,主要发育冲积扇沉积体系,而在凹陷的其他区域,主要发育辫状河三角洲-滨浅湖沉积体系。
Taking the first member of the Kongdian Formation of the Paleogene in the Cangdong Sag as a target segment, the sedimentary structures, lithological assemblages and sedimentary microfacies were identified by using the core. The source system was analyzed with light mineralogical data, and the sandstone thickness Spatial distribution law. Comprehensive analysis shows that the first member of Cangdong Depression is mainly composed of massive block structures and alternating bedding strata and other braided channel sandbodies. Controlled by the four provenance systems, namely the source of Xuyangqiao in the east and the source of Mengcun, The provenance and source materials of Kongdian in the north are mainly alluvial fan depositional systems in the west of Cangdong Sag. In other areas of the depression, the braided delta-shore-shallow lake sedimentary system mainly develops.