石油钻采工艺2011，Vol.33Issue(3)：1-4,4.
巴楚探区深井钻井难点分析与技术对策
Technical countermeasures and analysis on deep well drilling difficulties in Bachu exploration block
摘要
Abstract
Bachu Block is an important exploration and development area of Sinopec in Northwest China, with vast area to be explored, large depth of the well, and few completed wells, and few offset well materials can be taken as the reference in drilling operation, the formation features and drilling difficulties were analyzed in the paper, including palaeogeography, complex and hard lithology, gypsum, mudstone and high pressure salt water existing in some formations, resulting in low penetration rate, tight hole, drill pipe stuck, and hole wall sloughing, etc. The difficulties also lead to high trouble rate and longer drilling cycle. In order to solve these problems, the upper formations were drilled with KCl-polymer drilling fluids, and lower formations were drilled with KCl-polysulfonate drilling fluid. And plugging material screening, bottom hole assembly optimization, and bits optimization for deep formation drilling were also taken as the countermeasures. Through onsite applications, the penetration rate raised significantly, which provided a good example of drilling in mis area. The suggestion was also proposed to use a compound drilling mode, gear-down turbine, little bent screw and borehole reforming tools to raise the drilling rate.关键词
巴楚探区/深井/钻井/防阻卡/井壁稳定/提速Key words
Bachu exploration block/ deep well/ drilling/ pipe stuck prevention/ wellbore stabilization/ penetration rate raising分类
能源科技引用本文复制引用
王兴武,赵国顺,孙雪,马文英,陈迎伟,宁长征..巴楚探区深井钻井难点分析与技术对策[J].石油钻采工艺,2011,33(3):1-4,4.基金项目
国家863计划课题“超深井钻井技术研究”(编号:2006AA06A109)部分内容. （编号:2006AA06A109）
