东胜气田刘家沟组易漏地层随钻防漏技术研究
投稿时间:2022-02-11  修订日期:2022-07-15  点此下载全文
引用本文:李德红,罗宏志,李明忠,等.东胜气田刘家沟组易漏地层随钻防漏技术研究[J].钻探工程,2022,49(5):111-117.
LI Dehong,LUO Hongzhi,LI Mingzhong,et al. Technology of prevention leak while drilling for leaky formation in Liujiagou Formation in Dongsheng Gas Field[J]. Drilling Engineering, 2022,49(5):111-117.
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作者单位E-mail
李德红* 中石化华北石油工程有限公司河南 郑州 450006 wplidh6804@163.com 
罗宏志 中石化华北石油工程有限公司河南 郑州 450006  
李明忠 中石化华北石油工程有限公司河南 郑州 450006  
王翔 中国石油化工股份有限公司华北油气分公司石油工程技术研究院河南 郑州 450006  
张军义 中石化华北石油工程有限公司河南 郑州 450006  
王健 中国石油化工股份有限公司华北油气分公司石油工程技术研究院河南 郑州 450006  
张辉 中国石油化工股份有限公司华北油气分公司石油工程技术研究院河南 郑州 450006  
基金项目:中国石油化工股份有限公司项目“鄂北致密气提速提效提产技术集成推广应用研究”(编号:P20001)
中文摘要:东胜气田刘家沟组钻井井漏频发,钻井液漏失量大,井漏治理效率低,导致钻井周期长。借助地质和测井资料、电镜扫描等方法,分析刘家沟组裂缝宽度,明确裂缝型井漏机理。统计刘家沟组漏失数据,基于漏失速率与压差关联性,经数据拟合建立漏失压力预测模型,绘制东胜气田漏失压力横向分布剖面,为钻井防漏技术优化提供定量依据。基于循环压耗、激动压力计算模型,形成井筒压力预测方法,分析循环排量、机械钻速、下钻速度和钻井液性能对井筒压力影响规律,进而优化钻井参数。优选刚性颗粒、纤维材料和片状变形材料,优化粒径级配和组分配比,开发随钻预承压堵漏体系,砂床承压能力可以达到7 MPa以上。经现场应用,东胜气田水平井漏失率由57%降至25.7%,平均单井钻井液漏失量减少80.6%,平均单井漏失次数减少88.1%,助力钻井周期缩短。
中文关键词:钻井井漏  诱导裂缝  漏失压力  井筒压力  随钻防漏  刘家沟组  东胜气田
 
Technology of prevention leak while drilling for leaky formation in Liujiagou Formation in Dongsheng Gas Field
Abstract:Circulation loss in Liujiagou formation in Dongsheng Gas Field occurs frequently with large leakage amount and low treatment efficiency, resulting in long drilling periods. With geological data, logging data and electron microscope scanning, the fracture width of Liujiagou Formation was analyzed to determine the mechanism of fracture type leakage. The leakage data of Liujiagou Formation was summarized, the prediction model of leakage pressure was established through data fitting with the help of the correlation between leakage rate and differential pressure, and the transverse distribution profile of leakage pressure in Dongsheng Gas Field was drawn so as to provide quantitative basis for the optimization of circulation loss prevention technology. The calculation model of circulating pressure consumption and induced pressure is used to develop the wellbore pressure prediction method, and the influence laws of pumping rate, drilling speed, tripping-down speed and drilling fluid properties on wellbore pressure were analyzed to optimize drilling parameters. Rigid particles, fiber materials and sheet deformation materials were selected with optimized particle size gradation and component make-up ratio to develop the pre-pressure plugging-while-drilling system which provided. sand bed pressure bearing capacity exceeding 7MPa. Field application showed that the circulation loss in horizontal wells was reduced from 57% to 25.7%, the average circulation loss per well was reduced by 80.6%, the average leakage times per well was reduced by 88.1%, shortening the drilling periods.
keywords:lost circulation  induced fracture  leakage pressure  wellbore pressure  circulation loss prevention while drilling  Liujiagou Formation  Dongsheng Gas Field
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