中浅层水平井井眼轨道优化设计与现场施工

Optimized Design of Trajectory for Middle-shallow Horizontal Well and the Site Construction

摘要:

针对大庆油田中长、长水平段水平井钻井施工和下套管过程中摩阻、扭矩大，导致钻井速度慢，而井眼浸泡时间长易导致井壁失稳而进一步减缓施工速度，从而形成恶性循环，对钻完井施工影响极大的问题，从井眼轨道的合理设计进行了模拟计算，针对不同的剖面类型、造斜率和靶前距进行优化设计，确定合理的井眼轨道，以降低定向钻进和下套管过程中的摩阻和扭矩，为中长、长水平段水平井的顺利施工提供技术支持。

Abstract:

Low drilling efficiency was caused by large friction and high torque in drilling and casing running process in middle-long and long horizontal wells in Daquing oilfield and the borehole wall collapsing led by long time contact with drilling fluid further slowed down the construction speed. The stimulation was made to rationally design the well trajectory according to different profile types, build-up rates and frontal distances to hitting target to reduce the friction and torque in drilling and casing running process and provide technical support for the smooth construction of middle-long and long horizontal wells.