摘要
钻成1 500 m水平段的超深井,是开发塔中上奥陶统良里塔格组灰岩油气的关键钻井技术,针对斜深超过8 000 m塔中862H井起下钻、旋转钻井中各井段摩阻扭矩变化的特点,在水平井段优化钻具组合使用水力振荡器,使钻柱在复合钻进、滑动钻进作业中大幅降低扭矩与摩阻。通过对此井长直段、增斜段、水平井段的摩阻扭矩进行数据分析研究,找出了此类超深水平井的各井段摩阻扭矩变化规律,并提出产生附加扭矩的钻柱临界钻压的计算方法,该研究成果对国内超深水平井大规模实施具有指导性意义。
Drilling ultradeep horizontal wells with horizontal intervals about 1500 m long is a critical technology for development of limestone reservoir in upper Ordovician Lianglitage formation at Central Tarim. Well TZ862 H exceeded 8000 m MD,the variations of drag and torque at different well sections during trips and rotary drilling were analyzed,and the hydraulic oscillator was used to optimize BHA for drilling through horizontal interval,the drag and torque were largely reduced during both compound drilling and sliding drilling. A method of calculating critical WOB on drill string exerted with additional torque was put forward during the study. This study will be a guide for large scale drilling of ultradeep horizontal wells in China.
出处
《钻采工艺》
CAS
北大核心
2017年第2期5-7,共3页
Drilling & Production Technology
关键词
摩阻
扭矩
水力振荡器
摩擦系数
临界钻压
drag
torque
hydraulic oscillator
friction coefficient
critical WOB
