【摘要】 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。探讨了该单元在水驱和聚合物驱期间所表现的动态特征和影响开发效果的因素,注聚后进行了一系列的注采调整技术研究和实践,结果表明,合理地采取一些注采调整方法可以促使辫状河流沉积油藏中一区Ng5-6单元等二类注聚单元见效并达到较好的注聚增油效果。更多还原

【Abstract】 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. At the late stage of water flooding, although the recovery percent is 39.2%, water content is as high as 98% in 10% of wells, it is hard to tap the potential. Dynamic characters of water flooding and polymer flooding in the unit and the factors influencing development effect are discussed, and the techniques of adjustment of injection-production mode and operation used after polymer flooding are also discussed. The result shows that response of polymer flooding in Unit Ⅱin Unit Ng 5-6 in Block Zhongyi and better effect of polymer flooding and oil recovery are obtained by injection-production adjustment.更多还原