中二北Ng3-4单元1972年5月投产,1979年4月注水开发,1991年6月进入特高含水期,区块综合含水高达96.3%,是孤岛油田主力单元含水最高的单元之一。作为老油田,目前该区块含水高,水淹日趋严重,剩余油高度分散,层间和层内潜力越来越小,下一步工作难度越来越大。本文通过分析描述特高含水期影响剩余油分布规律的再认识,指导现场开发挖潜。 The Zhongbei Bei Ng3-4 unit was put into operation in May 1972, and waterflooding was developed in April 1979. In June 1991, it entered the ultra-high water cut period and the integrated water content of the block reached as high as 96.3%. It is one of the units with the highest water content in the main unit of Gudao Oilfield. As the old oilfield, the current high water content in the block, water flooding is becoming more serious, the remaining oil highly dispersed, the potential of layers and layers getting smaller and smaller, the next step is more and more difficult. In this paper, through the analysis and re-understanding of the description of the laws governing the distribution of remaining oil in the ultra-high water-cut period, we guide the development of the site to tap the potential.