摘要
渤中凹陷东营组内发育内陆湖盆中罕见的大型湖泊三角洲，其规模与海相盆地三角洲相当，通过渤中凹陷下第三系层序地层格架及其充填样式与构造特征的分析，探讨了东营组底部大规模超覆不整合，局部侵蚀削截不整合的表现形式，沙河街组与东营组之间的沉积－构造转换，东营组大型湖泊三角洲发育的地质背景和东二段大规模三角洲沉积体系的沉积特征与油气勘探前景。
Large lake deltas,equivallent to marine delta in size,occur within Dongying Formation in Bozhong sag.Based on analyses of Paleogene stratigraphic framework and tectonics in the sag,several aspects are discussed:(1)occurrence of unconformability of overlap and by local erosion at the base of Dongying Formation;(2)sedimentary tectonic transform between Dongying Formation and Shahejie Formation;(3)geological setting in which large lake deltas develop;and (4)depositional model of large lake deltas and their hydrocarbon potential.
出处
《中国海上油气（地质）》
2000年第4期226-232,共7页
China Offshore Oil and Gas(Geology)
