苏14-19-34井组水平井轨迹控制技术研究与应用

Research and application of horizontal well trajectory control technology in the Su 14-19-34 well group

摘要:

随着苏里格气田的深度开发，大井丛、三维水平井施工逐渐增多，增大了轨迹控制难度。丛式三维水平井存在防碰风险高，斜井段长导致摩阻和扭矩大滑动钻进困难，水平段长及产层不稳定导致钻压传递困难和井壁失稳、井壁清洁困难等问题。针对这些问题，通过优化剖面设计和钻具组合，采用盐水钻井液体系、螺杆优选及现场技术管理和操作人员精心应对，形成了配套的技术对策，有效地实现了钻井工程的安全高效。

Abstract:

With the deep development of Sulige Gas Field， the construction of large well clusters and three-dimensional horizontal wells is increasing gradually， which increases the difficulty on trajectory control. Drilling cluster type three-dimensional horizontal wells faces many issues， such as high collision risk； difficulty in slide-drilling due to large friction torque with the long build-up well section； and difficult WOB transfer， wellbore instability and cleaning difficulty due to the long horizontal section and unstable production layer. In view of these problems， a complete set of technical countermeasures have been formed through optimization of the drilling design and the drilling stem， adoption of the salt water drilling fluid system， optimization of the mud motor， and field technical management and the driller’s careful response， which has led to the safe and efficient completion of drilling works.