四川盆地泸州区块深层页岩气水平井钻井关键技术

王建龙, 于志强, 苑卓, 冯冠雄, 柳鹤, 郭云鹏

王建龙, 于志强, 苑卓, 冯冠雄, 柳鹤, 郭云鹏. 四川盆地泸州区块深层页岩气水平井钻井关键技术[J]. 石油钻探技术, 2021, 49(6): 17-22. DOI: 10.11911/syztjs.2021062
引用本文: 王建龙, 于志强, 苑卓, 冯冠雄, 柳鹤, 郭云鹏. 四川盆地泸州区块深层页岩气水平井钻井关键技术[J]. 石油钻探技术, 2021, 49(6): 17-22. DOI: 10.11911/syztjs.2021062
WANG Jianlong, YU Zhiqiang, YUAN Zhuo, FENG Guanxiong, LIU He, GUO Yunpeng. Key Technologies for Deep Shale Gas Horizontal Well Drilling in Luzhou Block of Sichuan Basin[J]. Petroleum Drilling Techniques, 2021, 49(6): 17-22. DOI: 10.11911/syztjs.2021062
Citation: WANG Jianlong, YU Zhiqiang, YUAN Zhuo, FENG Guanxiong, LIU He, GUO Yunpeng. Key Technologies for Deep Shale Gas Horizontal Well Drilling in Luzhou Block of Sichuan Basin[J]. Petroleum Drilling Techniques, 2021, 49(6): 17-22. DOI: 10.11911/syztjs.2021062

四川盆地泸州区块深层页岩气水平井钻井关键技术

基金项目: 中石油渤海钻探工程有限公司科技重大工艺项目“川渝页岩气钻井提速技术研究”(编号:2020ZD16Y-02)、中油油服统筹项目“新型设施、工具、工艺配套研究”(编号:2020T-002-006-2)联合资助
详细信息
    作者简介:

    王建龙(1984—),男,天津人,2010年毕业于中国石油大学(华东)胜利学院油气储运专业,2013年获中国石油大学(华东)油气井工程专业硕士学位,工程师,主要从事钻井提速工具研发与应用工作。E-mail: 383462010@qq.com

  • 中图分类号: TE242

Key Technologies for Deep Shale Gas Horizontal Well Drilling in Luzhou Block of Sichuan Basin

  • 摘要: 四川盆地泸州区块深层页岩气水平井钻井周期长、机械钻速低、钻具振动大,特殊岩性地层可钻性差、水平段井眼易失稳、地层温度高,且摩阻扭矩大、卡钻风险高。为保证作业安全,降低钻井成本,开展了水平井井身结构优化、水平段井眼轨道优化及轨迹控制等技术研究,推荐了激进钻井方式的最优参数,优选了特殊岩性地层减振提速和高效破岩技术;结合地面降温设备先导试验,优选了钻井液体系,并优化了钻井液性能参数,最终形成了泸州区块深层页岩气水平井安全高效钻井关键技术。该技术在泸州区块 4 口井中进行了试验,试验井平均井深5 601 m,水平段长1 884 m,钻井周期平均缩短14.5%,未发生井下故障。研究结果表明,该技术满足泸州区块安全高效钻井和推广应用要求。
    Abstract: Drilling deep shale gas horizontal wells in Luzhou Block of Sichuan Basin is challenging due to long drilling cycles, low rate of penetration (ROP), high drilling tool vibration, poor drillability of special lithological formations, horizontal wellbore instability, high formation temperature, and high friction torque and sticking risk etc. To solve these problems and to ensure operation safety and save the cost, technological research was carried out on the casing program design optimization of horizontal wells, and wellbore trajectory control and optimization of horizontal sections. As a result, the optimal parameters of the radical drilling method were recommended, and shock absorption, speed-up, and high efficiency rock breaking technologies for special lithological formations were selected. In addition, drilling fluid systems and performance parameters were recommended based on pilot tests of ground cooling equipment. Thus, key drilling technologies with high operation safety and efficiency were formed for the deep shale gas horizontal wells in Luzhou Block. The key technologies were tested in four wells in Luzhou Block, the results show that the drilling cycle was reduced by 14.5% on average and no downhole failures were reported with an average well depth of 5 601 m and a horizontal section length of 1 884 m. The research result show that the technologies can meet the requirement of safe and efficient drilling as well as having a wide application scope in Luzhou Block.
  • 图  1   泸州区块典型井身结构示意

    Figure  1.   Typical casing program in Luzhou Block

    图  2   钻井液排量与井眼清洁效果

    Figure  2.   Flow rate of drilling fluid and wellbore cleaning effect

    图  3   钻井液地面降温系统流程示意

    Figure  3.   Process of drilling fluid ground cooling system

    表  1   推荐钻井参数和井眼轨迹控制方式

    Table  1   Recommended drilling parameters and wellbore trajectory control methods

    施工阶段水平段长度/
    m
    钻压/
    kN
    转速/
    (r·min–1
    排量/
    (L·s–1
    风险井眼轨迹控制方式
    钻井提速≤1 000120~15080~10032~35 旋转导向工具+直螺杆
    钻井提速与风险兼顾1 000~1 500120~150100~12030~32 较低旋转导向工具+直螺杆
    较高旋转导向工具
    风险消减≥1 500100~15080~12030~32 较低 旋转导向工具
    较高近钻头伽马+弯螺杆+水力振荡器
    下载: 导出CSV

    表  2   泸州区块深层页岩气水平井钻井关键技术试验结果

    Table  2   Test results of the key technologies for deep shale gas horizontal well drilling in Luzhou Block

    井号完钻井深/
    m
    水平段长/
    m
    钻井周期/
    d
    机械钻速/
    (m·h–1
    A井5 3351 655115.926.02
    B井5 4371 700102.926.36
    C井5 3701 625 80.026.52
    D井6 2652 550141.385.97
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-12-29
  • 修回日期:  2021-09-08
  • 网络出版日期:  2021-09-22
  • 刊出日期:  2021-11-24

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