渤海L油田不同开发方式下注采井钻遇隔夹层位置优选实验研究
Petroleum Geology and Engineering(2019)
Abstract
针对隔夹层发育的海上L油田剩余油挖潜难点,通过提取典型井组地质参数,分别设计注入井单独钻遇隔夹层和生产井单独钻遇隔夹层2种情况下的6种注采井间隔夹层分布模型,对每种隔夹层分布模型均开展水驱和早期注聚实验,一共完成12个二维平板可视化模型实验.实验结果表明,在基础井网下,对于注水井钻遇隔夹层和生产井钻遇隔夹层,其隔夹层相对长度为井距2/3的布井模型的采收率指标均最高.注聚井组筛选应优先考虑2种情况:第一种为注水井钻遇隔夹层且隔夹层相对长度为井距1/3的模型,注聚采收率增幅可达18.2%;第二种为生产井钻遇隔夹层且隔夹层相对长度为井距2/3的模型,注聚采收率增幅可达19.0%.
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