In this paper, the reasons of low recovery in Mazhai are discussed, and the potential of improving oil recovery by zonal production is shown.

• 结合马寨油田的开采特点,论述了分层开采提高采收率的潜力,通过岩心实验证明了马寨油田分层开采可以提高采收率,现场应用结果证实了该结论。