边底水驱水平井开发油藏调剖物理模拟实验研究
Oil Drilling & Production Technology(2007)
Abstract
冀东油田高浅北区是以水平井开发为主的常温常压、边底水块状构造常规稠油油藏。由于储层疏松,边底水的长期冲刷造成储层非均质性加重,油藏含水上升快,采出程度低。为探索水平井调剖的可行性及常规定向井与水平井调剖提高采收率优劣,在纵向非均质模型上进行了三维物理模拟研究。通过布置高精度的压差传感器和饱和度探针,对比不同注入方式下压力变化情况与流体在模型中的渗流情况。结果表明,注入参数相同时,水平井调剖、水平井采出提高采收率18.3个百分点,常规定向井调剖、水平井采出提高采收率8.1个百分点。说明在该类油藏,水平井比常规定向井调剖能更好地提高油藏采收率。
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Key words
edgy and bottom reservoir,recovery rate,horizontal well,profile control,physical simulation,conventional directional well
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