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双河油田特高含水期剩余油分布具有“薄、散、小、差、低”的特点,为适应特高含水期剩余油挖潜的需要,注采井网必须精细化研究和管理。在搞清剩余油分布及合理优化井网技术界限基础上,通过局部完善井网、细分开采、层系转换、复杂结构井技术,辅助封堵、补孔、调剖等各种措施,进行井网优化组合挖潜剩余油。典型开发单元Ⅷ-Ⅸ油组井网优化组合实践表明,水驱油田特高含水期在井网不具备大规模加密调整条件下,井网重新优化组合是进一步改善水驱开发效果、提高采收率的有效途径。
The distribution of remaining oil in Shuanghe Oilfield is characterized by “thin, loose, small, poor and low”. In order to meet the need of tapping the remaining oil in the ultra-high water cut stage, the well pattern must be finely researched and managed. On the basis of clarifying remaining oil distribution and rationalizing the well pattern technology boundaries, various measures such as partially complementation well pattern, subdivision mining, bedding pattern conversion, complex structure well technology, auxiliary sealing, hole filling and profile control are carried out Well pattern optimization combined to tap the remaining oil. Typical development unit Ⅷ-Ⅸ oil well combination optimization shows that the ultra-high water cut period in the water-driven oilfield does not have a large-scale well-adjusted encryption conditions, re-optimization of the well pattern is to further improve the waterflood development and improve recovery Rate of effective way.