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SAGD直井—水平井组是钻上下2口平行水平井,其垂直间距小于5m,上水平井用于注汽,下水平井用于采油。另钻一直井,与采油水平井相连,用于辅助采油。其主要施工难点是:垂深浅,造斜井段短,轨迹控制难度大;上下2口平行水平井的水平段垂直间距小于5m,并且还要求采油水平井与直井对穿,要求轨迹控制精度高。通过采用精确轨迹控制及测量技术,磁性导向及反演推算技术,保证井眼轨迹的精确性以及直井和水平井的对接;大井眼扩眼技术是施工中采用的另一项关键技术。顺利完成的FHW200P/200I+F200VP直井—水平井组为今后同类型施工提供了经验。
The SAGD vertical well-horizontal well group drills 2 parallel horizontal wells with a vertical spacing of less than 5 m. The upper horizontal well is used for steam injection and the lower horizontal well is used for oil recovery. Another drilling has been well, connected with the horizontal wells for oil production, auxiliary. The main construction difficulties are as follows: the vertical depth is shallow, the length of the inclined section is short and the trajectory control is difficult; the horizontal interval between horizontal and vertical horizontal wells is less than 5m, and horizontal well and vertical well are also required to penetrate, requiring high precision of trajectory control . Through the use of precise trajectory control and measurement technology, magnetic guidance and inversion calculation technology, the accuracy of wellbore trajectory and the connection between vertical well and horizontal well are guaranteed. The big hole reaming technology is another key technology used in construction. The successfully completed FHW200P / 200I + F200VP vertical well-horizontal well group has provided the experience for the same type of construction in the future.