为了提高稠油热采及小规模砂体的开发效果,大庆油田设计施工了侧钻超短半径水平井J37-26-P14井.该井完钻井深629.62 m,造斜率20°/m,曲率半径仅为3.30m,造斜段水平位移为2.90 m,总水平位移为22.70m,水平段长19.58 m.该井施工中存在剖面设计紧凑、地层可钻性差、侧钻难度大、井眼曲率大造成钻具摩阻大等技术难点,在对超短半径的井身结构及井眼轨迹剖面进行优化设计和主要技术难点进行分析的基础上,制定了相应的技术措施,确保该井顺利完钻.该井的顺利完成,为其他侧钻超短半径水平井积累了宝贵经验.详细介绍了该井的设计与施工情况.%In order to improve the development efficiency of heavy oil thermal recovery and development in small sandstone reservoir, a sidetracking ultra-short radius horizontal well named J37-26-P14 was designed and drilled in Daqing Oilfield. Its total depth is 629. 62 m,the build-up rate is 20°/m,radius of curvature is 3. 30 m,horizontal displacement in kick-off section is only 2. 90 m,overall horizontal displacement is 22. 70 m,and the horizontal length is 19. 58 m. There are a lot of difficulties in drilling,such as compacted well trajectory,hard formation with poor drillability,high difficulty in sidetracking,big borehole curvature with high friction in drilling operation. Based on the optimization of casing program and well trajectory, along with analyzing the drilling difficulties,the appropriate technical measures were developed so that this well was drilled successfully. The paper describes the design and operation of this well in detail,and provides precious experience for sidetracking ultra-short radius horizontal well in the future.
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