Planar and interlayer contradictions are serious in braid river sedimentary reservoirs in Unit Ng5-6 of Block Zhongyi because of the influence of sandbody growing shape and its heterogeneity on the reservoirs.
辫状河流沉积油藏中一区Ng5-6单元,受砂体发育形态和砂体非均质性的影响,平面矛盾和层间矛盾比较突出,水驱开发后期,虽然采出程度仅为39·2%,但是10%油井含水高达98%以上,挖潜难度较大。