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川南页岩气水平井钻井技术难点与对策 被引量:32

Difficulties and Countermeasures in Horizontal Well Drilling for Shale Gas in Southern Sichuan
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摘要 川南页岩气工区地质条件复杂,井漏频发,卡钻、埋旋转导向工具问题时有发生,且钻井周期长,严重制约着提速提效。针对这些问题,从该工区储层特征和岩石力学特性入手,分析了页岩气水平井钻井技术难点,研究形成了以大尺寸井眼"减振+扶正"提速、长水平段随钻清砂防卡、强化参数提速、固化堵漏、简易控压钻井为核心的技术对策。该技术措施在川南64口页岩气水平井进行了应用,机械钻速提高,钻井周期缩短,取得了显著的综合效果。研究成果对该工区类似井及其他地区类似储层条件的页岩气水平井钻井具有借鉴作用或参考价值。 Shale gas drilling in southern Sichuan has been challenged by complex geological conditions,frequent lost circulation,stuck pipe and buried rotary steering tools and long drilling cycle,which severely hinder the penetration rate and efficiency enhancement.In order to solve these problems,the difficulties in drilling shale gas horizontal wells were analyzed according to reservoir characteristics and rock mechanical properties,which then formed the technical countermeasures by using“damping+centralizing”to increase drilling rate in big size holes,sand removal and anti-sticking while drilling at long horizontal section,parameter enhancement to increase drilling rate,solidification plugging,as well as simply managed pressure drilling.After the application of these technical measures,the ROP was increased,the drilling cycle was shortened,with remarkable comprehensive results.The research results can provide a reference for drilling shale gas horizontal wells in this area or other areas with similar reservoir conditions.
作者 李传武 兰凯 杜小松 韩明甜 刘春林 LI Chuanwu;LAN Kai;DU Xiaosong;HAN Mingtian;LIU Chunlin(HSSE Division,Sinopec Zhongyuan Oilfield Service Corporation,Puyang,Henan,457001,China;Southwest Drilling Company,Sinopec Zhongyuan Oilfield Service Corporation,Chengdu,Sichuan,610052,China;Field headquarter of South Sichuan,Sinopec Zhongyuan Oilfield Service Corporation,Longchang,Sichuan,641000,China)
出处 《石油钻探技术》 CAS CSCD 北大核心 2020年第3期16-21,共6页 Petroleum Drilling Techniques
基金 中石化中原石油工程有限公司科研项目“难钻地层钻头与工具协同提速技术研究”(编号:2017108) “西南工区页岩气井安全优快钻井集成配套技术应用研究”(编号:2019101)联合资助。
关键词 页岩气 水平井 机械钻速 钻井周期 随钻清砂 控压钻井 川南 shale gas horizontal well penetration rate drilling cycle sand removal while drilling managed pressure drilling the Southern Sichuan
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