钻井液与完井液2025，Vol.42Issue(3)：296-301,6.DOI:10.12358/j.issn.1001-5620.2025.03.003
东海超深大位移井油基钻井液技术
Oil-Based Drilling Fluid Technology for Ultra-Deep Extended Reach Wells in East China Sea
摘要
Abstract
Difficulties such as borehole wall instability,poor hole cleaning,drag encountered frequently during tripping due to high friction and torque,and difficult reaming,have been encountered in drilling operation in the Baoyunting block and the Pinghu block in east China Sea,which seriously affect the drilling efficiency.By analyzing the characteristics of the variegated mudstone formation,a technology using sized particles to achieve strong plugging was applied and the emulsification stability of the oil-based drilling fluid was improved to solve the problem of borehole wall instability.By optimizing the 6/3 r/min reading of the drilling fluid on six-speed viscometer,efficient cuttings carrying was achieved and the problem of hole cleaning in extended-reach well drilling in the East China Sea was solved.An independently developed lubricant LUBE OB was used to reduce the friction coefficient of the drilling fluid under high loads and the wear of drill strings and casings.This oil-based drilling fluid technology was successfully applied for the first time in drilling the 8000 m ultra-deep extended-reach well KQT-N.The oil-based drilling fluid has strong plugging capacity,high cuttings carrying efficiency and high lubrication performance,the use of which has reduced the time required for reaming in extended-reach wells in the East China Sea from 16.7%to 2.0%,greatly improving the drilling efficiency and providing technical support and guarantee for the safe and efficient development of the oil and gas fields in the East China Sea.关键词
超深大位移井/井壁失稳/润滑减阻/东海油气田/油基钻井液Key words
Ultra-deep extended-reach well/Borehole wall instability/Lubrication and drag reducing/The oil and gas fields in east China Sea/Oil-based drilling fluid分类
石油、天然气工程引用本文复制引用
佘运虎..东海超深大位移井油基钻井液技术[J].钻井液与完井液,2025,42(3):296-301,6.基金项目
中央引导地方科技发展专项"应用于深层油气田开发的大尺寸长裸眼井段钻井液技术研究"(2022BGE249). （2022BGE249）
