石油钻采工艺2025，Vol.47Issue(4)：407-415,422,10.DOI:10.13639/j.odpt.202505006
河套盆地光明构造超深井钻井提速关键技术
Key technologies for drilling speed enhancement in Hetao Basin ultra-deep wells with Guangming Structure
摘要
Abstract
The ultra-deep wells in the Guangming Structure of the Hetao Basin commonly face technical challenges including complex pressure systems,narrow safe mud density windows,poor well stability,low rock drillability in localized formations,and high well control risks.These issues often lead to complex downhole events such as kicks,losses,collapses,and stuck pipe,resulting in low drilling efficiency and prolonged cycle times.On this basis,Abnormal-pressure mechanisms were clarified,and a three-pressure(pore-fracture-collapse)profile was built with a multi-factor geomechanical model.This guided the optimization of casing programs,eliminating the historic upper lost-circulation,lower influx problem in the same open-hole section.Using rock-mechanical-property profiles,customized PDC bits and high-torque screw acceleration tools were selected,and drilling parameters were optimized to raise ROP.Based on the understanding of formation dip angle and the anti-inclination effect of large-sized well pendulum drilling tool combination,the anti inclination and fast drilling technology of vertical drilling tool matching screw is recommended.Based on stability analysis of high-pressure water-bearing formations and contamination tests,the innovative managed-pressure water-out safe drilling technique was introduced,sharply reducing both mud losses and loss events.Considering salt/gypsum distributions and creep laws,an oil-based mud system was chosen,supported by managed-pressure drilling and salt/gypsum-safe techniques,effectively controlling sticking and tight-spot risks.The combined technology was field-tested in three wells.Average drilling cycle dropped from 322 days to 195 days,a 39.44%reduction,markedly accelerating efficient exploration and development.The effort also provides valuable experience for future ultra-deep drilling acceleration across the Hetao Basin.关键词
超深井/钻井提速/井身结构/盐膏层/高压水层/井壁稳定/安全钻井/光明构造Key words
ultra-deep well/drilling speed optimization/well structure/salt-gypsum formation/high-pressure water zone/well stability/safe drilling practices/Guangming Structure分类
能源科技引用本文复制引用
吴刚,钟小军,范一文,赵昆,张波,钟文建..河套盆地光明构造超深井钻井提速关键技术[J].石油钻采工艺,2025,47(4):407-415,422,10.基金项目
中国石油重大科技专项"超深层碎屑岩油气规模增储上产与勘探开发技术研究"(编号:2023ZZ14). （编号:2023ZZ14）
