Yonganzhen oilfield is located at faulted terrace belt of sharp slope in Dongying depression which is a half graben depression controlled by three major faults.

• 永安镇油田位于单断式箕状凹陷（东营凹陷）的陡坡断阶带，受3条大断层控制，从南向北出现了低、中、高3个台阶带。