静52-H1Z鱼骨型水平井钻井技术

为了开发古潜山地层难动用储量、提高单井产量和油层采收率、降低水平井综合开发成本，静52-H1Z井在水平井段设计施工20个分支。针对悬空侧钻、主井眼重入、井身轨迹控制和地层的可钻性差等多个技术难点，提出了复合井眼悬空侧钻技术、主井眼管柱重入技术、井身轨迹控制技术和钻井提速技术等方法，在现场应用中取得了显著效果，大大缩短了钻井周期，保证了安全快速完井。静52-H1Z鱼骨型20分支水平井的顺利完钻，为国内油田鱼骨型水平井朝着更多分支方向的发展积累了丰富的?验，提供了有力的技术准备；同时，也标志着中国石油水平井钻井技术向国际领先水平再次迈进一步。

The drilling technology for fishbone jing 52-H1Z horizntal well

In order to develop the difficult-to-produce reserves in paleo-buried-hill formation, increase single well output and oil recovery of oil reservoir, reduce the cost for comprehensive development of horizontal wells, and improve economic benefits, 20 branch wells are designed and constructed in the horizontal section of Jing 52-H1Z well. In order to tackle the difficulties including the sidetracking, the reentrance of the main hole, the well bore trajectory control, and the poor drillability of the formation, some technologies are put forward, such as the sidetracking technology of compound holes, the pipe string reentrance technology of main holes, the well bore trajectory control technology, and the drilling speed increasing technology. All the technologies have been applied to the field successfully, greatly shortening the drilling cycle and guaranteeing the safe and fast completion of the well. The successful drilling of the 20 fishbone branch wells provide rich experience and powerful technical support for the fishbone horizontal wells in domestic oilfields to develop into more branch wells. Meanwhile, it marks that the horizontal well drilling technology of China National Petroleum Corporation （CNPC） is more approaching the world’s advanced level.