Fig. (2) Structural section map of Chepaizi High (modified from Shengli Oilfield, 2013). Q: Quaternary system; N₁t: Taxihe formation; N₁S₃: Sha-3 section of Shawan formation; N₁S₂: Sha-2 section of Shawan formation; Sha-1: Sha-1 section of Shawan formation; E: Paleogene system; K: Cretaceous system; J: Jurassic system; C: Carboniferous system