变径稳定器在鄂北水平井钻井应用研究  

Application of variable diameter stabilizers in drilling of long horizontal sections in north Ordos

作　　者：李德红 罗宏志 李季 温伟 李明忠 宋文宇 王超 王旭升 LI Dehong;LUO Hongzhi;LI Ji;WEN Wei;LI Mingzhong;SONG Wenyu;WANG Chao;WANG Xusheng(SINOPEC Huabei Oilfield Service Corporation,Zhengzhou Henan 450006,China)

机构地区：[1]中石化华北石油工程有限公司,河南郑州450006

出　　处：《钻探工程》2022年第2期123-128,共6页Drilling Engineering

摘　　要：鄂北大牛地、东胜气田施工水平井水平段长度在1000~2000 m之间,以稳斜钻进为主,为保证稳斜效果,降低轨迹调整频次,减少滑动钻进进尺,主要采用双扶稳斜钻具组合,起到了较好的稳斜效果。但鄂北致密砂岩储层的非均质性强,水平段经常钻遇泥岩夹层而调整轨迹,造成双扶稳斜钻具组合在轨迹调整中存在造斜率低、无法快速调整达到地质目的的问题。通过分析不同钻具组合作用效果,配套应用变径稳定器,控制其井下工作状态,改变外径尺寸,使钻具组合、结构和作用效果发生变化,满足轨迹控制需求,实现整体水平段稳斜钻进,并兼顾轨迹调整快速灵活的目的。在鄂北大牛地和东胜气田水平井水平段应用变径稳定器10余口井,平均机械钻速10.18 m/h,水平段提速24.6%,应用效果良好,实现了提高水平段钻井施工效率的目的,为鄂尔多斯盆地长水平段提速提效提供了有利借鉴。The horizontal section of the horizontal well in Daniudi and Dongsheng gas fields in northern Ordos is between 1000~2000m,and inclination-hold drilling is dominated. In order to ensure the inclination-maintaining effect,reduce the frequency of trajectory adjustment and reduce the slide drilling footage,the drilling assembly with the double stabilizers for inclination maintaining was mainly used to keep the inclination,and achieved good effect. However,the tight sandstone reservoirs in northern Ordos is highly heterogeneous,and the horizontal section often cuts through mudstone interlayers to make it necessary to adjust the trajectory,which led to the low build rate of the BHA assembly with the double stabilizers for inclination in the trajectory adjustment;thus,quick adjustment cannot be made to achieve the geological purpose. With analysis of the performance of different BHAs,the variable diameter stabilizers were applied to control their downhole working conditions. Through change of the outer diameter,they can change the drilling string,and its structure and effect to meet trajectory control,and realize inclination drilling along the whole horizontal section with quick and flexible trajectory adjustment. In Daniudi and Dongsheng gas fields in northern Ordos,the variable diameter stabilizers were applied to more than 10 wells in horizontal section drilling with the average ROP of 10.18m/h,and an increase of 24.6% in drilling rate for the horizontal section. The field results were good with improved drilling efficiency at horizontal sections,and can provide beneficial reference for improving drilling speed and efficiency at long horizontal section drilling in Ordos Basin.

关 键 词：变径稳定器 活塞 钻具组合 井斜 造斜率 水平井 

分 类 号：TE243[石油与天然气工程—油气井工程] P634[天文地球—地质矿产勘探]