悬空侧钻技术在红河油田水平井中的应用

Application of Suspended Sidetracking Technology in Horizontal Well of Honghe Oilfield

摘要:

在水平井储层钻进中，地层发生突变导致钻头偏出产层的情况时有发生，运用悬空侧钻的方法在储层内侧钻，选择更加有利的井斜角继续在储层内钻进，是一种高效、经济的施工方法。红河油田长8储层岩性为砂、泥岩互层，水平井在施工过程中易钻遇泥岩夹层，在水平段施工过程中钻遇泥岩后退至砂岩井段应用了悬空侧钻技术，通过优选侧钻点、侧钻钻头和钻具组合，采用合理的造斜率及侧钻钻压，确保其继续在储层砂岩中钻进，侧钻过程中油气显示良好。采用悬空侧钻技术成功地找到了储层，提高了储量钻遇率，为实现预计产量提供了保障。

Abstract:

Bit deviating out from producing formation by formation discontinuity some time happens in reservoir drilling with horizontal well. It is a high efficiency and economic construction method to use suspended sidetracking technology to sidetrack inside the reservoir formation with proper deviation angle. Chang-8 reservoir of Honghe oilfield is sand and mudstone interbed, it is easy to drill into mudstone interbed for horizontal construction. Back to the sandstone section, suspended sidetracking technology was applied, by optimization of sidetracking point, sidetracking bit and bottom hole assembly and with the rational deflection rate and sidetracking pressure, continuous drilling in reservoir sandstone was ensured with good oil gas show.