徐深21-平1井轨迹控制技术

Well Trajectory Control Technology of Xushen 21-Ping 1 Well

摘要:

徐深21-平1井完钻井深4955 m。在火山岩储层中横向穿行905 m，井眼轨迹控制精度要求高，并在登二泥岩段岩石可钻性达8级的情况下裸眼侧钻成功，为后续施工奠定了基础。简述了井身结构及轨迹剖面设计，分析了井眼轨迹控制难点，详细介绍了增斜段、侧钻段、水平段井眼轨迹控制情况。该井的成功钻探，为该区块水平井施工积累了宝贵经验。

Abstract:

With high control accuracy requirements on the wellbore trajectory, Xushen 21-Ping 1 well was completed at the drilling depth of 4955m with 905m drilling in transverse direction through the volcano rock reservoirs, and the sidetracking was successful under the condition of rock drillability of grade 8 in mudstone section, which laid the foundation for the subsequent construction. The paper sketches the well structure and trajectory profile design, analyzes the difficulties in well trajectory control and introduces in detail the wellbore trajectory control on the kick-off section, sidetrack section and horizontal section. The successful well drilling provides valuable experience for the horizontal well construction in this area.