滨南、利津地区古近系沉积相演化

东营凹陷滨南、利津地区古近系沉积相类型为扇三角洲、近岸水下扇、滨浅湖、半深湖、深湖等，自下向上的垂向演化序列为扇三角洲-半深湖相、深湖-扇三角洲相、近岸水下扇-滨浅湖-半深湖-滨浅湖相。根据对80多口探井的岩性统计分析，认为主要的碎屑物供应时期为沙四段沉积期和沙三段沉积晚期，除沙四段沉积期外，古近纪其余阶段陈家庄凸起的物源供给能力远远大于滨县凸起。图5参5

Evolution of sedimentary facies of the Paleogene in Binnan-Lijin areas, Dongying Sag

There were many sedimentary facies in Binnan Lijin areas of the Dongying Sag in the Paleogene, such as fan delta, inshore submerged fan, shallow lake, semi deep lake and deep lake. From bottom to upper sections, the sedimentary facies vertically evolved in such order: fan delta semi deep lake, deep lake fan delta, inshore submerged fan shallow lake semi deep lake shallow lake. Based on lithologic statistics in over eighty wells, it is suggested that the main periods of supplying sediments are the Sha 4 and the later Sha 3 sedimentation episodes. Except for Sha 4, in the other periods of the Paleogene, the Chenjiazhuang salient provided more sediments than the Binxian salient.