广安002-Z2鱼刺状多级分支水平井钻井技术

广安002-Z2是一口4井眼、2分支鱼刺井,在主井眼采用斜向器侧钻第1分支井,在第1分支井中采用悬空裸眼侧钻第2分支井,主导眼采用筛管完井,分支井采用裸眼完井。在斜向器回收未成功的情况下,采用绕障钻通主导眼实现压力连通。该井成功采用多种侧钻技术顺利完钻,累计水平段长达2031.71m,钻遇3个储层,大大地增加了天然气产量。该技术具有广阔的推广应用价值。

DRILLING TECHNOLOGY OF HORIZONTAL FISHBONE MULTILATERAL WELL IN GUANG AN 002-Z2 WELL

Guang'an 002-Z2 well has four wellbores, including a main guide hole, two branch fishbone wells and a connecting well. The first level branch was sidetrack drilled by a whipstock from the original hole. And the second level branch was then sidetrack drilled through the suspension open hole in the first lateral well. The main guide hole adopted screen completion, and the lateral well used open hole completion.When whipstock could not be recovered, a connecting well was drilled at the entrance of first level branch to connect the main guide hole. This well was successfully drilled by using several sidetrack drilling technologies. The total length of horizontal borehole of the well was 2031.71m. This horizontal fishbone multilateral well can greatly increase the natural gas production compared to the normal horizontal well. It is valuable to extend this drilling technology of horizontal fishbone multilateral well.