随着油田进入特高含水期,水淹比例不断增大,剩余油更加分散,挖潜难度增大,因此开展特高含水期水淹规律及挖潜策略研究,对油田稳产及后续开发意义重大。在渤海S油田特高含水期的新钻调整井、测井、生产动态监测资料的基础上,剖析了油田特高含水期平面及纵向的水淹类型及特征,总结了剩余油富集模式。结果表明,特高含水期砂体注采对应关系、储层质量差异、夹层、储层韵律及重力对剩余油的形成与分布具有直接的控制作用；在此基础上将水淹模式归纳为注采不完善型、合采被干扰型、顶部富集型、夹层控制富集型,并依据水淹模式,开展了水平井精细挖潜,矿场应用效果良好。研究成果对特高含水期油田精细挖潜具有指导意义。

As the oilfield enters the ultra-high water cut period, the proportion of water flooding is increasing, the remaining oil is more dispersed, and the difficulty of tapping potential is increasing. Therefore, it is of great significance to study the water flooding law and tapping potential strategy in the ultra-high water cut period for the stable production and subsequent development of the oilfield. Based on the new drilling adjustment wells, logging and production dynamic monitoring data of S oilfield in the ultra-high water cut period, the plane and vertical water flooding types and characteristics of the oilfield in the ultra-high water cut period are analyzed, and the remaining oil enrichment mode is summarized. The results show that the corresponding relationship between injection and production of sand body, reservoir quality difference, interlayer, reservoir rhythm and gravity have a direct control effect on the formation and distribution of remaining oil in ultra-high water cut stage. On this basis, the water flooding mode is summarized as imperfect injection and production type, combined production disturbed type, top enrichment type and interlayer controlled enrichment type. According to the water flooding mode, the fine potential tapping of horizontal wells is carried out, and the field application effect is good. The results have guiding significance for the fine potential tapping of oilfields in ultra-high water cut stage.