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.