According to the genetic sequence interfaces and regional tectonic movement

Tertiary strata in Nanpu depression can be divided into 7 super-sequences

missing only the 2nd super-sequence by comparison with other basins in Bohai Gulf. Each of these super-sequences generally constitutes a complete source-reservoir assemblage.The deep lacustrine mudstone in the middle sequence set is a relatively good source rock

and the wedge-shaped

coarse-grain sedimentary system in the lower sequence set is a good reservoir rock. So

the most prospective position for deep hydrocarbon reservoir exploration might be the part of coarse-grain deposition system in the lower position

which is extending to the central part of the basin.