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松辽盆地陆相致密油井壁失稳机理及钻井液对策

侯杰 李浩东 于兴东 杨决算

侯杰,李浩东,于兴东,等. 松辽盆地陆相致密油井壁失稳机理及钻井液对策[J]. 钻井液与完井液,2021,38(5):598-604 doi: 10.12358/j.issn.1001-5620.2021.05.009
引用本文: 侯杰,李浩东,于兴东,等. 松辽盆地陆相致密油井壁失稳机理及钻井液对策[J]. 钻井液与完井液,2021,38(5):598-604 doi: 10.12358/j.issn.1001-5620.2021.05.009
HOU Jie, LI Haodong, YU Xingdong, et al.Mechanisms of borehole wall instability of terrestrial tight oil wells in songliao basin and drilling fluid countermeasures[J]. Drilling Fluid & Completion Fluid,2021, 38(5):598-604 doi: 10.12358/j.issn.1001-5620.2021.05.009
Citation: HOU Jie, LI Haodong, YU Xingdong, et al.Mechanisms of borehole wall instability of terrestrial tight oil wells in songliao basin and drilling fluid countermeasures[J]. Drilling Fluid & Completion Fluid,2021, 38(5):598-604 doi: 10.12358/j.issn.1001-5620.2021.05.009

松辽盆地陆相致密油井壁失稳机理及钻井液对策

doi: 10.12358/j.issn.1001-5620.2021.05.009
基金项目: 中国石油天然气集团公司“十三五”重大科技专项“大庆油气持续有效发展关键技术研究与应用”(2016E-0212)
详细信息
    作者简介:

    侯杰,1983年生,高级工程师,现在主要从事钻井液处理剂合成及井壁稳定技术研究工作。电话 18245996628;E-mail:94478333@qq.com

  • 中图分类号: 254.3

Mechanisms of Borehole Wall Instability of Terrestrial Tight Oil Wells in Songliao Basin and Drilling Fluid Countermeasures

  • 摘要: 大庆油田松辽盆地北部为陆相致密油资源,在勘探开发中存在井壁失稳难题,制约着致密油的高效开发。因此,采用扫描电镜和X-衍射分析对地层岩心的微观结构和黏土矿物成分进行分析,并对其水化特性进行研究,从而分析了大庆油田致密泥岩油地层井壁失稳机理。通过研究钻井液抑制性、封堵能力、理化参数和泥饼质量对井壁稳定性的影响,最终研发了一套氯化钾低聚胺基钻井液体系。室内实验表明,该钻井液体系的抗温达120 ℃,极压润滑性系数小于0.12,滚动回收率大于96%,能抗10%膨润土侵,在大庆油田致密油区块现场应用20口井,井壁稳定效果良好,水平段平均井径扩大率小于6%,固井优质率大于90%,起下钻、下套管作业顺利。研究成果表明,氯化钾低聚胺基钻井液体系能够有效提高松辽盆地陆相致密油地层井壁稳定性,为提高大庆油田致密油开发效率、降低井下复杂事故提供了技术支撑。

     

  • 图  1  青山口组二三段泥岩SEM图

    图  2  不同岩层岩心在清水和白油中浸泡不同时间的对比

    图  3  陆相泥岩各地层清水滚动回收率

    图  4  不同致密油层层位岩心的清水膨胀曲线

    图  5  不同井k1y1层位岩心的清水膨胀曲线

    图  6  k1n2层位岩心在不同抑制剂溶液中的滚动回收率

    图  7  k1qn2+3层位岩心在不同抑制剂溶液的滚动回收率

    图  8  不同钻井液的泥饼质量

    图  9  经过低聚醇胺类抑制剂抑制剂处理前后的泥岩滚动回收率

    表  1  氯化钾低聚胺钻井液流变性能

    T/
    t/
    h
    φ600/
    φ300
    φ200/
    φ100
    φ6/
    φ3
    Gel/
    Pa/Pa
    FLAPI/
    mL
    FLHTHP/
    mL
    常温92/6550/349/73.5/5.02.5
    1201693/6351/3410/73.5/5.02.89.2
      注:钻井液密度为1.65 g/cm3
    下载: 导出CSV

    表  2  PF140-PX井现场施工钻井液性能

    井深
    m
    ρ/
    g/cm3
    FV/
    s
    PV/
    mPa·s
    YP/
    Pa
    YP /PV/
    Pa/mPa·s
    FL/
    mL
    pHCs/
    %
    Kf
    2801.1039142.00.143.89.00.1
    6301.15512212.00.554.010.01.50.0437
    8121.2240207.50.384.010.01.80.0437
    9601.25763521.00.604.89.01.80.0612
    12421.24633912.00.314.49.01.80.0612
    14641.261064920.50.425.69.01.80.0612
    15971.29763911.00.284.09.01.80.0349
    17981.291003813.00.345.69.02.00.0437
    19981.301202513.50.546.08.52.00.0524
    20081.28764014.00.354.88.01.80.0524
    26941.25783521.00.605.29.00.80.0612
    下载: 导出CSV
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  • 收稿日期:  2021-04-15
  • 刊出日期:  2021-10-01

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