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南川页岩气田超长水平段水平井钻井关键技术

姜政华 孙钢 陈士奎 李伯尧 董红烨

姜政华,孙钢,陈士奎,等. 南川页岩气田超长水平段水平井钻井关键技术[J]. 石油钻探技术,2022, 50(5):20-26 doi: 10.11911/syztjs.2022045
引用本文: 姜政华,孙钢,陈士奎,等. 南川页岩气田超长水平段水平井钻井关键技术[J]. 石油钻探技术,2022, 50(5):20-26 doi: 10.11911/syztjs.2022045
JIANG Zhenghua, SUN Gang, CHEN Shikui, et al. Key drilling technologies for horizontal wells with ultra-long horizontal sections in Nanchuan Shale Gas Field [J]. Petroleum Drilling Techniques,2022, 50(5):20-26 doi: 10.11911/syztjs.2022045
Citation: JIANG Zhenghua, SUN Gang, CHEN Shikui, et al. Key drilling technologies for horizontal wells with ultra-long horizontal sections in Nanchuan Shale Gas Field [J]. Petroleum Drilling Techniques,2022, 50(5):20-26 doi: 10.11911/syztjs.2022045

南川页岩气田超长水平段水平井钻井关键技术

doi: 10.11911/syztjs.2022045
基金项目: 中国石化科技攻关项目“常压页岩气钻完井及配套工艺技术研究”(编号:P21087)资助
详细信息
    作者简介:

    姜政华 (1974—),男,安徽黄山人,1994年毕业于长春地质学校探矿工程专业,工程师,主要从事页岩气钻井技术研究及相关管理工作。E-mail:295844502@qq.com。

  • 中图分类号: TE243+.1

Key Drilling Technologies for Horizontal Wells with Ultra-Long Horizontal Sections in Nanchuan Shale Gas Field

  • 摘要:

    南川常压页岩气田采用超长水平段水平井开发可提高其开发效益,但存在水平段极限延伸能力预测难、井眼轨迹控制难、井眼清洁效果差、钻柱摩阻扭矩大、套管下入难和固井易漏易气窜等技术挑战。为此,进行了管柱力学和流体力学分析,明确了超长水平段钻进和下套管时钻柱的受力状态,分析了超长水平段的水力延伸能力及关键影响因素。基于分析结果和南川页岩气田钻井实践,形成了井眼轨道优化设计、低成本高效导向钻井、井眼高效清洁、套管安全下入、超长水平段泡沫水泥浆固井等关键技术。上述技术在2口水平段长度超3 500 m的水平井进行了现场应用,全部使用国产的钻头、螺杆钻具及常规LWD,2口井平均钻井完井周期较设计缩短25.4%,实钻整体靶框控制在5 m以内,优质页岩钻遇率平均在90%以上,水平段复合钻进比例平均达90.45%,最大狗腿度0.15°/30m,高效成井的同时,实现了提速降本。南川页岩气田超长水平段水平井钻井关键技术,可为国内水平段长超3 500 m水平井的钻井提速提供借鉴。

     

  • 图 1  螺杆弯角对螺杆钻具造斜率的影响

    Figure 1.  Influence of screw bend on build-up rate of PDM

    图 2  常规水泥浆失重气窜现象与泡沫水泥浆防气窜作用示意

    Figure 2.  Gas channeling in conventional cement slurry under weightlessness and the role of foamed cement slurry in preventing gas channeling

    表  1  固井下套管摩阻与水平段长度及摩阻系数的关系

    Table  1.   Relationship between friction of casing running and horizontal section length as well as friction coefficient

    水平段
    长度/m
    不同摩阻系数对应的套管下入摩阻/kN
    0. 150. 200. 250. 30
    1 000 63.96 98.40132.84167.28
    1 500 79.95123.00166.05209.10
    2 000 95.94147.60199.26250.92
    2 500113.88175.20236.52297.84
    3 000131.82202.80273.78344.76
    3 500151.16232.00312.84393.68
    4 000170.50261.20351.90442.60
    下载: 导出CSV

    表  2  不同井身剖面对应的摩阻、扭矩对比

    Table  2.   Friction and torque values of different well profiles

    井身剖面最大狗腿度/
    ((°)·(30m)−1
    地面扭矩1)/
    (kN·m)
    摩阻/kN钻具疲劳
    系数
    钻具屈曲时的钻压/kN
    起钻下钻复合钻进滑动钻进
    类双二维523.437.513.90.27320130
    五段制525.337.615.60.28280 50
    注:1)用100 kN钻压模拟地面扭矩。
    下载: 导出CSV

    表  3  水力振荡器应用情况

    Table  3.   Applications of hydraulic oscillator

    井号井段/m进尺/m井段工具入井时间/h减阻效果,%
    SYX-2HF3 268~4 3881 606造斜段,水平段175.033.2
    4 388~4 874水平段120.0
    SYX-5HF3 687~4 385 698水平段203.534.6
    下载: 导出CSV
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  • 收稿日期:  2021-09-23
  • 修回日期:  2022-04-11

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