摘要
塔深1井五开从6800m钻进到完钻井深8408m,所钻油藏岩性以白云岩为主,岩性复杂,给井斜控制带来了极大困难,曾多次采用各种常规的防斜打直技术,都没有取得成功。后使用弯螺杆动力钻具MWD随钻测斜纠斜技术,通过控制钻压、螺杆弯度、工具面,定向与复合钻进来对井斜进行控制,用正确方法精心调整反扭角、选用抗高温高压MWD和动力钻具、下钻分段循环降温等措施克服了超深井段给工具使用带来的问题,有效地控制住了井斜,优质高效地完成了钻井任务。应用结果表明,MWD加弯螺杆动力钻具纠斜是一种高效、安全、简单实用的纠斜方法,不仅在井斜控制困难时有使用价值,在常规钻井中推广使用也能有效提高效率和控制井斜。
The fifth spudding of Well Tashen-1 is drilled from 6800 m to 8408 m when completed. The formation mainly consists of dolomite and features in complex lithology, which makes it difficult to control well deviation. All conventional deviation control technologies to drill vertically have been applied for many times, but they do not work at all. Later, bent screw drills and MWD (measurement while drilling) technology for deviation measuring and straightening are applied. The difficulties in using tools to drill ultra-deep well sections are solved, based on controlling the drilling pressure, the screw rod camber, and the tool surface, controlling well deviation through directional and compound drilling, adjusting untwist angle correctly, using MWD and dynamic drilling tool resistant to high temperature and high pressure, drilling down in segmentation and reducing temperature in circulation. Well deviation is controlled effectively, as well as drilling tasks are fulfilled with high quality and high efficiency. Application results show that the anti-deviation with MWD and bent screw drills features in high efficiency, safety, simplicity and practicality. It is not only practical in dealing with difficult well deviation control, but can also be applied to conventional drilling to improve the efficiency and control deviation.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2007年第3期111-113,共3页
Oil Drilling & Production Technology
基金
中国石化集团公司项目"塔深1井钻井工程"
编号GC-2005-204-ZT025
关键词
井斜
弯螺杆
纠斜力
反扭角
钻压
高温高压
超深井
well deviation
bent screw drill
anti-deviation force
untwist angel
drilling pressure
high temperature and high pressure
ultra-deep well
