LG地区X井快速钻井配套工艺技术  

A complete set of fast drilling technology used on the well X in the LG area

作　　者：晏凌[1] 胡卫东[1] 陈怀高[1] 刘德平[1] 陈云坤[1] 

机构地区：[1]中国石油天然气集团公司川庆钻探工程公司

出　　处：《天然气工业》2009年第10期57-58,64,共3页Natural Gas Industry

基　　金：中国石油天然气集团公司重点科学试验项目(编号:07G2030206)的研究成果

摘　　要：LG地区X井是中国石油天然气集团公司布置在该构造上的一口风险探井,存在井深、岩石可钻性差,参考资料较少,钻遇异常高压可能性大,井底温度高,纵向上地层压力系统多,硫化氢含量普遍较高等钻井工程风险。针对深井安全钻井的难点,开展了气体钻井、螺杆带PDC钻头、防斜钻井等综合配套技术试验研究,并提出如下建议:①在井下出现油、气、水显示,已危及钻井安全,或供气量不够、井底沉砂超过20m,接单根困难以及有阻卡现象,应及时转换为钻井液钻井;②采用空气锤不仅能够保证良好的井身质量,而且能保持较高的机械钻速,应继续在311.2mm井段中推广应用钟摆、满眼钻具防斜技术;③加强总结,不断完善LG构造上的深井、超深井安全快速钻井配套技术。The well LG-1 is the first key exploratory well at LG structure.It is featured by great well depth,poor rock drillability,inadequate reference data,high possibility of abnormally high pressure formations,high bottom-hole temperature,multiple formation pressure systems along the vertical direction,and high H2S content.To overcome the problems challenging the safe deep drilling,comprehensive research and tests have been done on gas drilling,compound drilling with PDM and PDC bits,and deflection-preventive drilling.Some suggestions have been provided as follows:a.during gas drilling,if there is oil,gas or water show,which is endangering the drilling safety,or if the gas rate is insufficient,causing a thickness of over 20 m of the settled sands at the bottomhole and resulting in difficult connection or sticking,gas drilling should be turned to mud drilling;b.the air hammer can not only ensure high wellbore quality,but help maintain a high ROP,and the pendulum and packed hole techniques should also be kept in service at the 311.2 mm-diameter hole section;c.lessons and experiences should be learned continuously to improve the safe and fast drilling technology for deep and ultra-deep wells at the LG structure.

关 键 词：深井 探井 勘探 碳酸盐岩 气体钻井 螺杆钻具 PDC钻头 

分 类 号：TE242[石油与天然气工程—油气井工程]