陆相页岩水平井钻井施工存在的问题及措施
Oil-Gasfield Surface Engineering(2013)
Abstract
泌页HF1井设计井深3 661 m,水平段1 000 m,三开井身结构.该井在施工过程中出现了侧钻未成功、钻头泥包、井壁失稳及划出新眼等复杂情况与问题.划眼时具体的应对措施是:二开每钻进100 m短起下钻,并坚持利用顶驱倒划眼,破坏岩屑床和井眼清洁;三开每钻进200 m短起下钻,下钻将旋转导向的支撑伸缩臂收回,倒划眼起钻时将支撑伸缩臂张开,有利于破坏岩屑床和井下安全.泌页2HF井的钻井施工达到了安全、快速完钻的效果,建议水平段利用旋转导向的伸缩臂进行倒划眼,以达到破坏岩屑床和实现井下安全之目的.
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