The main fault in Dawa oilfield is a long-term active fault, companying with SWW direction faults in Eocene and NWW-EW direction faults in Neocene.

• 大洼主干断裂是一个基底断裂，是一个古近纪长期活动的生长断裂，它控制着清水洼陷的沉积；