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由于水平井增产效果较好,越来越被人们所认识,水平井数量逐渐增加,因此,水平井大小修施工技术是摆在修井行业中的重点工作。由于井眼曲率及井斜角加大,在水平井底部易于形成“砂床”而卡死钻具,同时钻具受“钟摆力”的作用底部磨擦阻力加大,拐点处套管与钻具摩擦阻力随钻具负荷的增加而加大等诸多问题,给水平井施工就造成了一定难度,有效解决这些问题,是我们水平井施工的有效保证,以杜84—兴H450水平井施工为例,简要介绍施工过程中取得的一点经验,谨供修井行业技术人员参考。
Because of the better effect of horizontal well stimulation and more and more people being aware of it, the number of horizontal wells is gradually increasing. Therefore, the horizontal well repair technology is the key work in the well servicing industry. Due to the increase of wellbore curvature and well inclination angle, it is easy to form a “sand bed” at the bottom of the horizontal well to seize the drilling tool, meanwhile the drilling tool is affected by the “pendulum force”, the friction resistance at the bottom increases, The frictional resistance between pipe and drilling tool increases with the increase of the burden on the drilling tool, which will cause some difficulties for the horizontal well construction. Effective solution to these problems is an effective guarantee for the construction of our horizontal well. With Du 84-H450 horizontal well Construction as an example, a brief introduction to the experience gained in the construction process, I would like to refer to the well service industry technical staff.