西藏尼玛盆地超2000m油气调查井施工技术实践

Practice of Construction Technology for More than 2000m Oil and Gas Investigation Well in Tibet Nima Basin

尼1井为油气调查井,完钻深度2001.10 m,该井为西藏地区最深小口径地质岩心钻井。通过对施工设备选型、钻井结构设计、取心工艺、冲洗液护壁及钻遇复杂地层处理方案等进行论述,总结在高海拔地区钻探施工经验,分析存在的不足,为今后西藏该地区钻探施工提供一定的参考。

Being the deepest small diameter geological core well in Tibet area, Ni - 1 is an oil and gas investigation well with the final depth of 2001. lm. The discussion is made on the construction equipments selection, borehole structure de- sign, coring technology, flushing fluid wall protection and treatment scheme for drilling in complex formations, the drilling construction experiences in high altitude area are summed up with the analysis on the existing shortcomings, which can pro- vide some experience for future drilling construction in ~his area of Tibet.