点坝内部构型控制的剩余油分布物理模拟

his paper aimed to summerize the remaining oil distribution patterns controlled by lateral accretion shale beddings within point-bar of meandering river reservoir, using the method of waterflooding physical simulation. The simulation results show that remaining oil distribution is controlled by three factors, i.e., horizotal spacing of lateral accretion shale beddings, reservoir permeability difference and water injection mode. In general, remaining oil enriches in the middle and upper part of lateral accretion sandbody in point-bar, especially the well-controlled lateral accretion sandbodies are more enriched; The larger the horizontal spacing of lateral accretion shale beddings, the stronger refluxing effect of injectant, the bigger recovery degree; and the smaller the horizontal spacing, the more enrichment space of remaining oil. As to the well-controlled lateral accretion sandbody, sweeping degree is lower when the injection direction is reverse to the tendency of lateral accretion shale bedding, and the remaining oil is more enriched. The lager reservoir permeability difference, more obvious the priority sweeping of the bottom of point-bar, and the more enrichment space of remaining oil. Remaining oil distibution patterns from physical simulation experiment can be used to product the remaining oil of the similar oilfield more efficiently.