变径稳定器在鄂北水平井钻井应用研究
投稿时间:2021-03-18  修订日期:2021-11-26  点此下载全文
引用本文:李德红,罗宏志,李季,等.变径稳定器在鄂北水平井钻井应用研究[J].钻探工程,2022,49(2):123-128.
LI Dehong,LUO Hongzhi,LI Ji,et al. Application of variable diameter stabilizers in drilling of long horizontal sections in north Ordos[J]. Drilling Engineering, 2022,49(2):123-128.
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作者单位邮编
李德红 中石化华北石油工程有限公司河南 郑州 450006 450006
罗宏志 中石化华北石油工程有限公司河南 郑州 450006 450006
李季 中石化华北石油工程有限公司河南 郑州 450006 450006
温伟 中石化华北石油工程有限公司河南 郑州 450006 450006
李明忠 中石化华北石油工程有限公司河南 郑州 450006 450006
宋文宇 中石化华北石油工程有限公司河南 郑州 450006 450006
王超 中石化华北石油工程有限公司河南 郑州 450006 450006
王旭升 中石化华北石油工程有限公司河南 郑州 450006 450006
中文摘要: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。
中文关键词:变径稳定器  活塞  钻具组合  井斜  造斜率  水平井
 
Application of variable diameter stabilizers in drilling of long horizontal sections in north Ordos
Abstract: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.
keywords:variable diameter stabilizer  piston  BHA  well inclination  build rate  horizontal well
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