G0-7 三维水平井井组工厂化钻井工艺

Factory drilling technology for G0-7 3D horizontal well group

王万庆 石仲元 付仟骞

WANG Wanqing SHI Zhongyuan FU Qianqian

川庆钻探工程公司长庆钻井工程总公司，陕西西安　710018 川庆钻探工程公司长庆井下技术作业公司，陕西咸阳　712000

Changqing Drilling Engineering Corporation, Chuanqing Drilling Engineering Company, CNPC, Xi’an 710018,China Changqing Downhole Service Company, Chuanqing Drilling Engineering Corporation, CNPC, XianYang 712000, China

G0-7 三维水平井组部署在长庆油田苏里格气田东南部，由1 口直井、2 口定向井、2 口常规水平井、4 口三维水平井组成，采用工厂化钻井作业“一字型”施工模式，3 部钻机同时施工，每部钻机施工1 口常规井和2 口水平井。针对丛式井组施工难点，从防碰绕障、井身剖面优化、井眼轨迹控制、降摩减阻等方面制定一系列措施，形成“预分法”井眼防碰绕障、三维井剖面优化、三维井井眼轨迹控制及CQ-SP2 钻井液体系等特色技术。该丛式井组水平井平均机械钻速达9.68 ｍ / ｈ，同比提高18.19％，平均钻井周期为55.67 d，比原有模式施工周期缩短8.82%。该井组工厂化作业顺利完成为长庆油田部署三维水平井井组工厂化作业提供了有力技术支撑。

The G0-7 3D horizontal well group is planned in the southeast part of Sulige Gasfield of Changqing Oilfield, composed by 1 straight well, 2 directional wells, 2 conventional horizontal wells and 4 3D horizontal wells. The factory drilling operation was adopted – three rigs started drilling at the same time and each drilled one conventional well and two horizontal wells. In view of difficulties in drilling of cluster well group, a series of measures were formulated in terms of anti-collision and avoiding barriers, wellbore profile optimization, wellbore trajectory control, reducing friction and drag, and special techniques were developed like ‘pre-split’ anti-collision and avoiding barriers, 3D well profile optimization, 3D well wellbore trajectory control and CQ-SP2 drilling fluid system, etc. The penetration rate of this cluster well group was 9.68 m/h in average, up by 18.19% on year-on-year basis, and average drilling period was 55.67 d, shortened by 8.82% compared with the original drilling mode. The successful factory drilling operation of this well group provides a strong technical support for factory drilling operation of 3D horizontal wells planned by Changqing Oilfield.

10.13639/j.odpt.2015.02.008