奥陶纪时期，本区处于北为汉南古陆与巴山隆起，南为广阔的陆表海盆地的古地理环境。

The natural geography of the Ordovician period is that: the Hannan paleocontinent and the Bashan Mountain rise at the north, and the wide epicontinental sea basin lies in the south.

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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。

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.

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