The distribution of original stratigraphic thicknesses shows that the Dongpu Sag was a rifted basin in the Paleogene,while the characteristics of different periods were obviously different.

• 古近系原始地层厚度分布反映出东濮凹陷在古近纪具有裂陷盆地的构造古地理特点,但是古近纪不同时期裂陷盆地的特征有明显的差异。