浅析渠平三井水平段卡钻事故

Brief Analysis on Sticking Drilling Accident in Horizontal Section in Quping Three Well

在井深钻进至2971.05m,接单根时,上提显卡(最高78t,钻遇14m左右"膏质盐岩"或团块状盐岩)。经过13天的打捞,7次倒扣。最后打水泥塞侧钻,对接渠二井没有成功,其原因分析为:盐二井侧钻溶腔因上部顶板垮塌造成淤积堵塞,无法连通建立生产循环。故又打水泥塞侧钻,对接渠盐二井成功,达到预期目的。此次的成功对接,为今后处理水平井的事故积累了宝贵经验。

When the well depth is 2971.05 m,and when the single root is connected,the upper lift card（the highest 78t,the drill meets 14 m ＂paste salt rock＂ or mass of salt rock）.After 13 days of salvage,7 back-buckles,and finally cement plug side drills,the connection between two well failed.The reasons of this are that the salt two wells are blocked by the collapse of the upper roof,which can not be connected to the production cycle.Therefore,the cement plug is drilled,and the two wells are connected successful and the target is achieved.The successful connection has accumulated valuable experience for the future treatment of horizontal wells.