董7井井壁稳定钻井液技术  

DRILLING FLUID TECHNOLOGY OF SIDEWALL STABILITY FOR DONG 7 WELL

作　　者：邱春阳[1] 刘学明[1] 王兴胜[1] 王宝田[1] 

机构地区：[1]中国石化集团胜利石油工程有限公司钻井工程技术公司

出　　处：《天然气勘探与开发》2014年第4期77-81,13,共5页Natural Gas Exploration and Development

基　　金：中国石化先导项目(SG12030)"准噶尔盆地西山窑组井壁稳定技术应用研究";胜利石油管理局项目(GKZ1211)"准噶尔盆地钻井液技术研究与应用"部分内容

摘　　要：通过探讨钻井液抑制机理和封堵机理,优选了抑制剂和封堵剂,研发了铝胺抑制防塌钻井液体系,该体系抑制性好,封堵性强,在董7井进行了现场应用。通过采用合理密度支撑-"多元协同"抑制-物化封堵防塌技术,解决了上部地层泥页岩易水化分散及侏罗系地层井壁失稳的难题,顺利穿过高压盐水层,完成了钻探目的和地质任务,为该区块其它井的施工提供了有力的技术保障。We explored both inhibition and plugging mechanisms of drilling fluid,optimally selected the inhibitor and plugging agent,and developed an aluminum amine anti-sloughing drilling fluid system.This system has good inhibition and strong plugging performance,and was applied to Dong 7 well.By using reasonable density support,multivariate cooperation inhibition,physicochemical plugging anti-sloughing technology,some difficulties,such as likely hydration and dispersion of mud shale in upper formation,and sidewall instability in Jurassic formation,can be solved.Moreover,it may successfully drill through brine layers with high pressure and further complete a drilling,providing a powerful technical support for other wells in the same block.

关 键 词：董7井 铝胺 井壁稳定 煤层 抑制 封堵 

分 类 号：TE254[石油与天然气工程—油气井工程]