Two types of fan deltaic sequences have been identified in Bijia fault block,Binnan Oilfield,i e.near source sequence and far source sequenec.

• 滨南油田毕家断块扇三角洲分为粗粒突变型（近源型）和细粒渐变型（远源型）两种层序。由第四砂层组到第一砂层组，表现为由浅水到半深水的逐渐演化过程。