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第46 卷第

6 期煤炭科学技术Vol?

46 No?

6 2018 年6月Coal Science and Technology Jun.

2018 深部煤层气 T 型井钻井技术 杨刚1 ?孟尚志1 ?李斌1 ?李孝勇2 ?张林强1 ?马腾飞1 ?陈小波1 (1.中联煤层气有限责任公司 北京 100016?2.上海巨龙石油技术有限公司 上海 201100) 摘要:为解决常规侧钻窗口大、曲率半径大?水力喷射径向水平井钻头尺寸小、煤层中进尺短等问 题?研发了以柔性钻具为核心的 T 型水平井技术?其侧钻窗口仅

20 cm?曲率半径 1.

8、2.5 m?借助叠加 式斜向器可以实现多目的层分支水平井??139.7 mm 套管内侧钻 ?112 mm 井眼?实现了大尺寸超短半 径水平井钻进? 井壁稳定性分析论证了清水+2%KCl 可以满足深部煤层造斜段及水平段钻进要求? 摩阻转矩分析表明?旋转钻进、起钻及下钻

3 种工况下柔性钻具不会发生弯曲破坏?可以安全钻进

100 m? 水力参数分析表明?泵排量 0.5~ 0.7 m3 / min 可以同时满足井眼清洁和快速破岩要求? 在临 兴-神府气田试验成功了国内第一口深部煤层气

6 分支 T 型水平井?2 个煤层内各部署

3 个分支?目 的煤层深约

1 900 m?煤层中累计水平进尺达

478 m?其中

4 个分支水平进尺超

100 m? 关键词:T 型钻井技术?侧钻?柔性钻具?叠加式斜向器?深部煤层气 中图分类号:TD712?P618 文献标志码:A 文章编号:0253-2336(2018)06-0189-06 Drilling technology of T-shaped well in deep coalbed methane YANG Gang1 ? MENG Shangzhi1 ? LI Bin1 ? LI Xiaoyong2 ? ZHANG Linqiang1 ? MA Tengfei1 ? CHEN Xiaobo1 (1.China United Coalbed Methane Co.? Ltd.? Beijing 100016? 2.Shanghai Julong Oil Technology Co.? Ltd.? Shangshai 201100) Abstract:In order to solve problems?such as the large window and curvature radius in conventional sidetrack drilling? small drilling bit in radial horizontal well with hydraulic jetting? and short drilling footage in coal seam? T-shaped horizontal drilling technology with flexible drilling tools has been developed. Its resultant window is only

20 cm and curvature radius ranges from 1.8/ 2.5 m. Using the superposition whip stock? multilayers can be targeted by multi-branch horizontal drilling once. With ?112 mm of sidetrack hole in ?139.7 mm casing? the drilling of horizontal well with ultrashort radius and large size is realized. The wellbore stability analysis demonstrates that the stability of the drilling of kick-off and horizontal sections can be guaranteed with only clean water +2% KCl. According to the torque analysis? the flexible drilling tools would not be destroyed with bending failure during rotatory drilling? drilling down or pulling out the hole? which per~ mits

100 m of safety drilling. The analysis of hydraulic parameters shows that the pump delivery of 0.5~0.7 m3 / min can meet the require~ ment of borehole cleaning and fast rock cracking. An industrial test in Linxing-Shenfu gas field using this technology has been conducted. It is the first deep CBM T-shaped well with six branches? three branches in each of two layers of coal seam. At present? the target depth is around

1 900 m with total horizontal footage is up to

478 m? among which the horizontal footage of four branches has exceeded

100 m. Key words:T-shaped drilling technology? side tracking? flexible drilling tools? superposition whip stock? deep coalbed methane 收稿日期:2018-03-10?责任编辑:赵瑞DOI:10?

13199 / j? cnki? cst? 2018? 06?

032 基金项目:国家科技重大专项资助项目 (2016ZX05066) 作者简介:杨刚(1986―)?男?山东青州人?工程师?博士? Tel:010-84527681?E-mail:yanggang9@ cnooc.com.cn 引用格式:杨刚?孟尚志?李斌?等? 深部煤层气 T 型井钻井技术[J]? 煤炭科学技术?2018?46(6):189-194? YANG Gang?MENG Shangzhi?LI Bin?et al.Drilling technology of T-shaped well in deep coalbed methane[J]? Coal Science and Technology? 2018?46(6):189-194?

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