杜84-馆H53ch侧钻水平井扩眼技术  

REAMING TECHNOLOGY USED IN SIDETRACKED HORIZONTAL WELLBORE OF THE WELL DU84-GUAN H53ch

作　　者：王廷瑞[1] 丁文正[2] 曹生[2] 张世军[2] 荣振[2] 李壮[2] 

机构地区：[1]西南石油大学 [2]中国石油辽河石油勘探局

出　　处：《天然气工业》2008年第9期62-63,66,共3页Natural Gas Industry

基　　金：中国石油天然气集团公司重大科技攻关项目“提高侧钻井质量、降低成本技术”中的研究成果

摘　　要：杜84-馆H53ch是国内实施的第一口在水平段开窗的侧钻水平井。由于在水平段套管内侧钻尚属首次,开窗及定向均比较困难,受水平窗口、地层、摩阻、施工参数影响,弯螺杆前面的钻头方向不断处于变化之中,导致钻出的井眼呈多台阶形状,进而使实施过程中的起下钻摩擦阻力明显增加。为解决测井和后期下套管遇阻问题,提出通过扩眼来消除由于弯螺杆弯方向变化形成的多台阶井眼。着重分析了造成侧钻水平井寿命短的主要原因,探讨了扩眼技术在杜84-馆H53ch井的应用及主要工艺措施。实测结果表明:该摩擦阻力高于正常水平井的两倍以上,严重影响了后期作业的实施。扩眼施工后,整个测井和下套管施工安全顺利,无任何阻、卡现象发生。整个固井施工也未出现任何漏失或憋堵现象,电测显示,固井质量良好。In China the well Du84-Guan H53ch is the first horizontal wellbore sidetracked from the parent horizontal section.Due to the first try of the kind in China,both sidetracking window milling and orientation were challenging,which were affected by horizontal window,formations,friction,and operational parameters.In addition,the bit angle was changing before the bent-housing PDM,forming a wellbore with multiple stages,making tripping friction remarkably increased.In order to ensure successful running of logging tools and casings,reaming was recommended to change the multi-stage profile formed.In this paper the main causes of the shortened life of sidetrack wellbore were analyzed,the application of reaming technology on the well Du84-Guan H53ch was probed and major procedures were discussed.The frictional force actually measured in that well was more than twice of that in average horizontal wells.However,after reaming,the logging and casing running later performed were both successful,no sticking or resistance.And no fluid loss or pump pressure buildup took place during cementing.The logs showed a good cementing quality.

关 键 词：水平井 侧钻 扩眼 固井质量 套管 

分 类 号：TE243[石油与天然气工程—油气井工程] TE245