空气钻井井斜控制问题的探讨  

DISCUSSION ON THE WELLBORE DEVIATION CONTROLLING IN AIR DRILLING

作　　者：项德贵[1] 葛云华[1] 孙梦慈[2] 于文华[2] 赖晓晴[1] 陈志学[2] 

机构地区：[1]中国石油勘探开发研究院 [2]玉门油田分公司勘探事业部

出　　处：《钻采工艺》2005年第5期1-3,13,共4页Drilling & Production Technology

摘　　要：玉门青西油田地层岩性不均,岩性变化频繁,地层极硬,研磨性极强,可钻性差,机械钻速较低,造成全井钻井速度较慢。为了提高机械钻速,在窿9井等4口井试验了空气钻井,大幅度地提高机械钻速,但出现空气钻井井斜不易控制的问题。文中阐述和分析了影响空气钻井可控因素和不可控因素对井斜影响的机理;阐述了空气锤防斜技术,分析了空气锤在窿15井试验未起到防斜的原因,对今后空气钻井的设计和施工具有一定的指导意义。The penetration rate is rapidly increased by air drilling, but the wellbore deviation is not controlled easily. The paper introduces controlled and uncontrolled factors of influencing deviation in air drilling including BHA, bit weight, speed of rotation, formation anisotropism and stratigraphic dip etc. parameter, analyses control deviation technique of air hammer, discusses the reason of the deviation uncontrolled by air hammer in well Long 15. On the basis of the air drilling experiment in Qingxi oilfield, the result shows that fanning the bottom can achieve the goal of reduced deviation. It is a guide for design and operation of air drilling in future.

关 键 词：青西油田 空气钻井 井斜 钻具组合 空气锤 地层可钻性 

分 类 号：TE242.6[石油与天然气工程—油气井工程]