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适用于万米深井的大温差水泥浆

刘景丽 刘平江 任强 刘岩 彭松 曹洪昌 张文阳 程小伟

刘景丽,刘平江,任强,等. 适用于万米深井的大温差水泥浆[J]. 钻井液与完井液,2023,40(6):778-786 doi: 10.12358/j.issn.1001-5620.2023.06.012
引用本文: 刘景丽,刘平江,任强,等. 适用于万米深井的大温差水泥浆[J]. 钻井液与完井液,2023,40(6):778-786 doi: 10.12358/j.issn.1001-5620.2023.06.012
LIU Jingli, LIU Pingjiang, REN Qiang, et al.A cement slurry for large temperature difference in wells of ten thousand meter depth[J]. Drilling Fluid & Completion Fluid,2023, 40(6):778-786 doi: 10.12358/j.issn.1001-5620.2023.06.012
Citation: LIU Jingli, LIU Pingjiang, REN Qiang, et al.A cement slurry for large temperature difference in wells of ten thousand meter depth[J]. Drilling Fluid & Completion Fluid,2023, 40(6):778-786 doi: 10.12358/j.issn.1001-5620.2023.06.012

适用于万米深井的大温差水泥浆

doi: 10.12358/j.issn.1001-5620.2023.06.012
基金项目: 中国石油天然气集团有限公司科技重大项目“万米超深层钻探关键工程技术与装备研制”(2023ZZ20)。
详细信息
    作者简介:

    刘景丽,高级工程师,1980年生,毕业于辽宁大学应用化学专业,现在主要从事油井水泥外加剂研发工作。电话 15076693117,E-mail:99692598@qq.com。

  • 中图分类号: TE256

A Cement Slurry for Large Temperature Difference in Wells of Ten Thousand Meter Depth

  • 摘要: 针对超深井长封固固井中,顶部底部水泥浆温差大,顶部低温段水泥浆超缓凝、水泥石强度发展缓慢的问题,采用水溶液聚合法制备了一种MgAl-EDTA-LDH(EDTA插层型水滑石)大温差早强剂,并配套形成了一套大温差水泥浆体系。实验结果表明,该大温差早强剂具有一定的缓凝效果,当其加量为2.0%,复配4.0%缓凝剂时,在240 ℃下其稠化时间可达509 min。该水泥浆在60 ℃养护1 d和30 ℃下养护6 d的抗压强度均大于7 MPa,最大温差为210 ℃。大温差早强剂在不影响水泥浆稠化可调性的前提下,有利于低温段水泥浆柱的强度发展,耐热温度达300 ℃以上,适用于大温差固井需求。

     

  • 图  1  大温差早强剂的XRD分析曲线

    图  2  大温差早强剂的热重曲线

    图  3  大温差早强剂与不同外加剂复配水泥浆稠化曲线

    图  4  大温差早强剂对水泥浆稠化时间的影响

    图  5  3-6#配方在60 ℃下的水泥石XRD测试

    图  6  3-6#配方在60 ℃下的水泥石TG测试

    图  7  3-6#配方在60 ℃下养护1 d的水泥石微观形貌图

    图  8  大温差早强剂作用机理示意图

    表  1  大温差早强剂与外加剂配伍性评价

    配方分散剂降失水剂缓凝剂实验条件t稠化/min
    1-1#DRS-1SG33SGH-9L140 ℃×70 MPa×70 min293
    1-2#USZDRF-3LGH-8L160 ℃×80 MPa×80 min393
    1-3#USZG33SGH-8L180 ℃×90 MPa×90 min275
    1-4#DRS-1SDRF-3LGH-9L205 ℃×130 MPa×70 min438
    1-5#USZG33SGH-9L215 ℃×130 MPa×110 min506
    1-6#ZF-1ZJ-5ZH-6240 ℃×110 MPa×130 min441
      注:水泥浆基础配方为100%水泥+30%石英砂+5%微硅+(0~2%)大温差早强剂+(0.4%~0.6%)分散剂+(1.5%~2.0%)降失水剂+(2%~4%)缓凝剂+1.5%高温悬浮稳定剂+H2O(W/S=0.44)。
    下载: 导出CSV

    表  2  大温差水泥浆综合性能评价

    配方缓凝剂
    ZH-6/%
    大温差
    早强剂/%
    流动度/
    cm
    FL/
    mL
    Δρ/
    g·cm−3
    nK/
    Pa·sn
    2-1#3.0024.0370.010.840.61
    2-2#3.00.124.0390.010.830.67
    2-3#3.00.524.0360.010.860.64
    2-4#3.01.023.5430.010.840.63
    2-5#3.02.023.0400.020.870.67
      注:水泥浆基础配方为100%水泥+30%石英砂+5%微硅+0.4%分散剂ZF-1+2%降失水剂ZJ-5 +1.5%高温悬浮稳定剂BH-ZW-1+H2O(W/S=0.44)。
    下载: 导出CSV

    表  3  大温差水泥浆性能评价实验

    配方实验条件ZH-6/
    %
    大温差
    早强剂/%
    t稠化/
    min
    3-1#120 ℃×60 MPa×60 min1.50.3308
    3-2#140 ℃×70 MPa×70 min1.60.6319
    3-3#160 ℃×80 MPa×80 min1.80.8364
    3-4#180 ℃×90 MPa×90 min2.51.2444
    3-5#205 ℃×130 MPa×70 min3.01.5438
    3-6#215 ℃×130 MPa×110 min3.51.8442
    3-7#240 ℃×110 MPa×130 min4.02.0509
      注:水泥浆基础配方:100%水泥+30%石英砂+5%微硅+0.4%分散剂ZF-1 +2%降失水剂ZJ-5+1.5%高温悬浮稳定剂BH-ZW-1+H2O(W/S=0.44)。
    下载: 导出CSV

    表  4  大温差水泥浆体系抗压强度测试结果

    配方静止温度下
    p24 h /MPa
    不同温差不同养护时间的水泥石抗压强度/MPa
    返高温度90 ℃返高温度60 ℃返高温度30 ℃
    1 d2 d3 d1 d2 d3 d6 d
    3-1#26.5919.2321.9822.3118.5419.6620.1315.21
    3-2#25.1315.6217.3419.7411.0313.2815.4512.65
    3-3#23.8713.5815.2716.8810.6711.3414.8610.54
    3-4#21.0312.1514.0716.919.6410.9112.748.75
    3-5#19.8912.3714.5114.8210.8911.3613.649.01
    3-6#20.4611.8713.9814.7511.3713.8414.218.69
    3-7#17.739.1210.1211.057.598.979.617.35
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-07-19
  • 修回日期:  2023-09-02
  • 网络出版日期:  2023-11-16
  • 刊出日期:  2023-12-30

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