鄂尔多斯盆地西缘冲断带页岩气井综合治漏技术  

Comprehensive Leakage Control Technology for Shale Gas Wells in Western Margin Thrust Zone of Ordos Basin

作　　者：孙欢 朱明明 杨勇平 王伟良 王凯 赵向阳 SUN Huan;ZHU Mingming;YANG Yongping;WANG Weiliang;WANG Kai;ZHAO Xiangyang(Changqing Drilling Company,CNPC Chuanqing Drilling Engineering Company Limited,Xi’an,Shaanxi,710018,China;Drilling&Production Engineering Technology Research Institute,CNPC Chuanqing Drilling Engineering Company Limited,Xi’an,Shaanxi,710018,China)

机构地区：[1]中国石油集团川庆钻探工程有限公司长庆钻井总公司,陕西西安710018 [2]中国石油集团川庆钻探工程有限公司钻采工程技术研究院,陕西西安710018

出　　处：《石油钻探技术》2025年第1期49-54,共6页Petroleum Drilling Techniques

基　　金：中国石油集团川庆钻探工程有限公司项目“长庆非常规油气井多层系断层靶向治漏技术研究”(编号:CQ2022B-16-1-3)资助。

摘　　要：鄂尔多斯盆地西缘逆冲带区域深层页岩地层交界面存在天然裂缝,长裸眼井段多套承压薄弱层同存,承压能力弱,钻井过程中漏失频发,严重制约着钻井提速增效。研究了随钻承压护壁技术,以提高裸眼井段承压薄弱层的承压能力;采用了长裸眼漏层精准定位技术,以实现漏层的精准定位;研发了酸溶性高滤失堵漏工作液,用其封堵裂缝性恶性漏失,大幅提高钻井时效。将述技术集成形成了鄂尔多斯盆地西缘冲断带页岩气井综合治漏技术。该技术在鄂尔多斯盆地西缘冲断带14口井页岩气井进行了现场应用,专项堵漏时间缩短55.25%,钻井周期缩短15.5d。鄂尔多斯盆地西缘冲断带综合治漏技术为该盆地页岩气井的安全高效开发提供了技术支持。The western margin thrust zone of the Ordos Basin are characterized by the presence of natural fractures at the interface of deep shale formations,with multiple sets of weak pressure-bearing layers coexisting in the long open hole wellbore section,resulting in weak pressure-bearing capacity and frequent lost circulation during drilling,which seriously restricts drilling speed and efficiency.To this end,the pressure-bearing wall protection while drilling technology has been studied to enhance the pressure-bearing capacity of weak pressure-bearing layers in the open hole sections.Precision positioning technology for leak layers in long open hole sections has been employed to achieve accurate positioning of the leak layers.Acid-soluble high-filtration plugging fluid has been developed,which was highly effective in plugging severe loss caused by fractures and thus significantly improving drilling efficiency.These technologies have been integrated into comprehensive leakage control technologie for shale gas wells in western margin thrust zone of Ordos Basin.These technologies have been applied in 14 shale gas wells in the thrust zone at the western margin of Ordos Basin,reducing the special plugging time by 55.25% and shortening the drilling period by 15.5 days.The comprehensive leakage control technologies for the thrust zone at the western margin of Ordos Basin provide technical support for the safe and efficient development of shale gas wells in Ordos Basin.

关 键 词：页岩气 护壁剂 漏层定位 高滤失堵漏工作液 综合治漏 鄂尔多斯盆地 

分 类 号：TE283[石油与天然气工程—油气井工程]