大港滩海大位移井井壁稳定技术研究  

The Bore-hole Stability Technique in Dagang Nearshore Oilfield

作　　者：邹灵战 汪海阁 张红军 程荣超 卓鲁斌 

机构地区：[1]中国石油集团钻井工程技术研究院,北京100195

出　　处：《重庆科技学院学报（自然科学版）》2012年第5期80-82,95,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金："长江学者和创新团队发展计划"项目(IRT0411);全国百篇优秀博士论文基金项目(200349)

摘　　要：大港油田主要采用大位移井开发滩海油气资源。在2008年埕海二区大位移井钻井中遭遇了严重的井壁坍塌,单井平均事故复杂时效达22%,严重影响大位移井的安全。通过对油页岩层理弱面强度测定、斜井井壁应力分析、井眼轨迹对坍塌压力和破裂压力的影响分析、井壁稳定的力学和化学对策的研究,指导井眼轨迹优化设计、安全泥浆密度窗口确定及钻井液性能改进,现场应用效果显著。In Dagang oilfield,ERW well is the main drilling mode.In 2008,ERW drill encountered severe well bore instability,resulting in drilling complex and failure which account for average 22 percent drilling time,which greatly impacted on the efficiency of drilling.A suit of techniques is summarized,including pore-pressure prediction,in-situ stress determination,rock tri-axial strength test,character of strength on bedding plane,side wall stress analysis,effect of well trajectory on collapse pressure and bursting pressure.The research gives advice to optimize the well trajectory,safe mud density window,property of drilling fluid,the favorable achievements has been obtained.

关 键 词：大位移井 井壁稳定 油页岩 

分 类 号：TE21[石油与天然气工程—油气井工程]