• 责任者：Li Zengle (Research Institute of Drilling Engineering Technology ; Daqing Drilling and Exploration Engineering Corporation ; Daqing 163413 ; China)
• 刊名：Exploration Engineering
• 出版年：2013
• 卷期：40(10)
• 关键词：水平井 ; horizontal wells ; 井眼轨迹 ; hole trajectory
• 页码：p.43-45
• 图表：2 tables, 5 refs.
• 分类号：2000
• issnNo：ISSN1672-7428
• isbnNo：CN11-5063/TD

     Low drilling efficiency was caused by large friction and high torque in drilling and casing running process in mid- die-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.