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2003年石南21井区头屯河组油藏以反九点井网注水投入开发,取得较好效果,随着开发的进行,因层间非均质性较强,剖面动用不均的现象凸显,故在有利区域进行了加密调整。运用状态对比方法,从产液产油能力、产油量水平递减、含水变化情况、剖面动用情况以及最终的水驱效果,对石南21A1加密区的生产效果进行了分析。结果表明:加密后生产效果变好,水驱最终采收率可提高近7%。
In 2003, the Toutunhe Formation reservoir in Shiyan 21 well area was flooded with water injected from the 9 o’clock well pattern and achieved good results. As the development progressed, the phenomenon of uneven interlayer utilization due to strong interlayer heterogeneity Highlight, so in the favorable area for encryption adjustment. By using state contrast method, the production efficiency of heaped 21A1 shoal was analyzed from the capacity of oil production, the decrease of oil production, the change of water cut, the profile utilization and the final water flooding effect. The results show that after the encryption, the production effect becomes better and the ultimate recovery ratio of waterflood can be increased by nearly 7%.