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海外河油田目前均处在高采出程度、高含水开发后期,长期注水冲刷形成的高渗水通道,导致大量注入水低效、无效循环。在注采井网完善的条件下,常规注水措施效果逐年变差,再次提高水驱动用程度的可能性基本没有,亟需开展转换开发方式提高采收率技术的研究。针对油田开采过程中出的主要问题,为改善水驱效果,提出了“2+3”采油技术思路。在海外河开展了“2+3”采油矿场试验,取得了很好的增油降水效果。
Overseas Hetian oilfield are currently in the high-recovery, high water-cut development, the long-term infiltration flushing formed by the seepage channel, resulting in a large number of injected water ineffective, ineffective cycle. Under the condition of perfecting the injection and production well pattern, the effect of conventional water injection measures becomes worse year by year, and there is almost no possibility of raising the degree of water drive again. Therefore, it is urgent to carry out the research on the technology of conversion and development to enhance oil recovery. In view of the main problems in the oilfield mining process, the idea of “2 + 3 ” oil production technology was put forward to improve the waterflooding effect. In the overseas river to carry out “2 +3 ” oil field test, and achieved good oil precipitation effect.