Dongpu depression, a oil-gas bearing basin, is situated in the southwest Bohaiwan basin.Puwei sag is a subunit that is tectonically located in the north central upheave of Dongpu depression.

东濮凹陷湾西南部的一个含油气盆地，濮洼陷构造位置上处于东濮凹陷起带北部，为一负向次级构造单元。