征1-斜5井钻井液技术

摘要

Zheng 1-X 5 well was located at central uplift belt in Zheng 1 block in Junggar Basin.The difficulty of drilling fluid technology was great because of complex geologic structure .According to petrography character in different interval, poly inhibition and formation sealing drilling fluid and aluminium and amine lubrication and anti-caving drilling fluid was applied .The well was drilled successfully with the help of corresponding onsite maintaining and managing technics.The down-hole troublesome condition of blockage during tripping and bit balling in Tuguluqun Formation,sloughing in Jurassic and borehole stability during the course of directional drilling .The ROP was high than drilling adjacent wells,and the goal of drilling with high quality and safety was achieved.%征1-斜5井位于准噶尔盆地中央隆起带中部征1区块。该区块地层岩性复杂，钻井液技术难度大。针对不同井段地层岩性，使用聚合物抑制封堵钻井液体系和铝胺润滑防塌钻井液体系，辅助相应的现场钻井液维护处理工艺，保证了施工的顺利进行，解决了吐谷鲁群地层水化引起的起下钻遇阻及泥包钻头、侏罗系坍塌掉块及长裸眼定向过程中井壁失稳的难题；机械钻速较邻近同井深直井高，达到了优快钻井的目的。