茂加65-82井双分支超短半径水平井钻完井技术  

Drilling and Completion Technology for a Two-Branch Multi-Lateral Ultra-Short Radius Horizontal Well:Maojia 65-82,Daqing Oilfield

作　　者：杨决算 郑瑞强 

机构地区：[1]中国石油大庆钻探工程有限公司钻井工程技术研究院,黑龙江大庆163413

出　　处：《石油钻探技术》2016年第1期63-66,共4页Petroleum Drilling Techniques

基　　金：中国石油天然气集团公司重大科技专项"大庆油田原油4000万吨持续稳产关键技术研究"之课题"喇萨杏油田厚油层顶部挖潜工艺技术研究"(编号:2011E-1206)资助

摘　　要：为了进一步完善超短半径水平井钻完井技术,提高单井产油量,大庆油田设计施工了茂加65-82双分支超短半径水平井。针对2个分支井眼曲率半径不一致导致井眼轨迹控制难度大、分支井眼与窗口密封难度大等技术难点,根据茂加65-82井原井眼情况,对双分支水平井眼的井身结构、井眼轨道进行了优化设计,并在钻头体与导向管之间设计了倾角,以满足造斜要求,顺利完成了曲率半径分别为5.9和3.2m的上下分支水平井眼,井眼轨迹达到了设计要求。茂加65-82侧钻双分支水平井初期日产油量2.5t,与原井产油量相比提高了8.3倍,目前日产油量1.0t,已累计增油380t。茂加65-82双分支超短半径水平井的顺利钻成为大庆油田剩余油挖潜提供了一种新的技术手段。To further improve ultra-short radius horizontal well technology,the Daqing Oilfield team designed a two-lateral ultra-short radius horizontal well for Maojia 65-82.They designed it with two branches to improve the yield of a single well.In order to overcome the difficulties of well trajectory control and difficulties of sealing branch holes and windows due to different curvature radius in the two branched holes,the inclination angles between the drill bit and the guide pipe were designed to meet the requirement of buildup.They combined the optimum design for the casing program which was completed incorporating well profiles and well trajectory optimum design based on the original borehole conditions of the well.As a result,the upper and lower branches with radius of curvatures of 5.9mand 3.2m were completed successfully in the Well Maojia 65-82.The initial daily oil production in the Maojia 65-82 was 2.5t,which is8.3times higher than that of the original borehole.At present,daily oil production is 1.0tand cumulative oil production is 380 t.The completion of the multilateral ultra-short radius horizontal well Maojia 65-82 with two branches may provide a new method for exploitation of residual oil in the Daqing Oilfield.

关 键 词：超短半径水平井 分支井 钻井设计 井身结构 井眼轨迹 茂加65-82井 

分 类 号：TE243.9[石油与天然气工程—油气井工程]