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51/2″套管开窗侧钻由于受诸多条件限制,井下复杂处理难度大于普通井。其中井漏问题就是一个复杂的技术难题。其漏失机理和处理工艺与常规井有较大不同,处理不当极易引起井下复杂及故障,严重影响侧钻井施工安全和质量,也会延长侧钻井周期,大幅度增加钻井成本。文章从51/2″套管内开窗侧钻特点、井漏原因、影响因素、预防思路等入手,结合现场应用做了较全面的分析。对小井眼安全施工有较好地指导意义。
51/2 “casing window-opening side-drills, due to a lot of conditions, the complexity of underground processing is more difficult than that of ordinary wells, of which the well-leakage problem is a complicated technical problem.The leakage mechanism and treatment process are quite different from conventional wells, Inappropriate and easily lead to complex and fault downhole, seriously affecting sidetrack construction safety and quality, but also to extend the side of the drilling cycle, a substantial increase in drilling costs.This article from 51/2 ”casing window fenestration characteristics, causes of leakage, the impact Factors, prevention ideas to start with the field application to do a more comprehensive analysis. Slimhole safety construction has a good guiding significance.