圆柱靶小半径三维绕障定向井钻井技术在萨中区块的应用

Application of 3D bypass anti-collision technology in cylindrical target directional well with small radius in Sazhong block

大庆油田萨中区块井网密集,为确保新钻调整井轨迹躲避老井,使定向井井眼轨迹精准命中目的层,要求钻小半径、圆柱靶区定向井。通过对剖面设计优化、钻具组合的优化、总结不同区块的地层对井眼轨迹的影响规律等一系列措施,建立起了一套较为完善的圆柱靶、小半径三维绕障定向井钻井技术,并取得了较好的钻井效果。

As the well pattern of Sazhong block in Daqing oilfield is dense, in order to gurantee new wells trajectory, avoid old wells and make wellbore trajectory accurately into the target layer, the cylindrical target directional well with small radius should be required. Through optimization of profile design and bottom hole assembly (BHA), the effect regularity on wellbore trajectory has been summarized and a set of drilling technology for cylindrical target directional well with small radius has been established. The application results indicate good drilling effects have been achieved.