塔河油田TK634井防扩径技术

The Over-Gauge Resisting Technique for TK 634 Well in Tahe Oilfield

分析认为,TK634井三叠系、石炭系地层井眼扩径的原因是地层微裂隙发育且分散性和膨胀性粘土矿物含量高,提出了控制钻井液密度、实施屏蔽封堵护壁技术、提高钻井液化学防塌能力等防止井眼扩径的技术措施。现场应用表明,该井二开井段平均井径扩大率为0.60％,井身质量达到优质。

Micro fracture, high contents of clay with dispersant and swelling are over gauge reasons while drilling Triassic formations. According to this, this paper presents the methods for preventing from over gauge by controlling mud density, taking shielding technology, improving anti-caving ability of drilling fluids. Field applications to the second spudding got an average over gauge of 0. 06%, and achieved a high quality wellbore.