塔里木深井长裸眼扩眼技术

塔里木油田地质情况复杂,为了安全钻达目的层,对于一些复杂井要进行非常规套管程序设计,必须要有相应的配套钻井工艺技术。在?215.9mm井眼采用扩眼技术就是为了使?193.7mm无接箍套管能够顺利下入设计井深,塔参-1井使用水力扩眼器在?215.9mm井眼扩眼后,成功将?193.7mm无接箍套管下至6963.24m,段长1651.24m;在秋参-1井使用偏心钻头扩眼,成功将?193.7mm无接箍套管下至6271m,段长2800m,2种扩眼方式均取得了较好的扩眼效果,着重介绍了这2种扩眼方式的施工特点和技术要点。

Reaming Technology in the Long Open Hole of the Deep Wells in Tarim

Due to the complicated geological conditions in Tarim Oilfield, non conventional casing programs are applied for some complex wells, for safe drilling into the target zones. However, suitable matching drilling techniques must be available, e.g., to run the ?193.7mm non-joint casing to the designed depth, reaming is required in the ?215.9mm hole. For example, in Well Tacan-1, hydraulic reamer was used in the ?215.9mm hole, and the ?193.7mm non-joint casing was successfully run to 693.24m, with a string length of 1651.24m; by using the eccentric bit in Well Qiucan-1, the ?193.7mm non-joint casing was smoothly run to 6271m, with a string length of 2800m. Both the two reaming methods all obtained good results, and the operation characteristics and key points in this technology were stressed in detail.