涪陵页岩气田三维水平井井眼轨迹控制技术

为满足地理环境条件和页岩气高效开发需要,涪陵页岩气田采用"井工厂"模式开发,多采用中、长半径三维水平井。针对原井眼轨道设计不利于三维水平井优快定向钻井、三维井眼轨迹控制难度大、三维井眼摩阻扭矩大等技术难点,通过优化设计,应用三维水平井井眼轨迹控制、三维井眼降摩减阻等技术,以提高三维水平井机械钻速,缩短定向钻井周期。现场应用表明,涪陵页岩气田三维水平井二开定向周期缩短46.36%,三开定向周期缩短5.76%,成效显著。 

3D Trajectory Control Technology for Horizontal Wells in the Fuling Shale Gas Field

In order to accommodate the realities of the geographical environment and goals of developing shale gas in a highly efficient way, the Fuling Shale Gas Field has adopted the "well factory" mode that includes drilling 3D horizontal wells with both medium and long. The original profile design was not appropriate for drilling horizontal wells efficiently, and it is difficult to control 3D well trajectory, due to high drag and torque. Through the optimization of the profile design, combined with 3D horizontal well trajectory control technology and drag reducing technology, the rate of penetration for 3D horizontal wells has been raised, and the drilling cycle shortened. Field application results demonstrate that this technology is remarkably efficient in the Fuling Shale Gas Field, where it reduces the operation time of the second section of 3D horizontal wells by 46.36% and that of the third section by 5.76%.