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冀东NP280 Es31井壁稳定钻井液技术

吴晓红 陈金霞 王现博 阚艳娜 丁乙 罗平亚

吴晓红,陈金霞,王现博,等. 冀东NP280 Es31井壁稳定钻井液技术[J]. 钻井液与完井液,2023,40(6):725-732 doi: 10.12358/j.issn.1001-5620.2023.06.005
引用本文: 吴晓红,陈金霞,王现博,等. 冀东NP280 Es31井壁稳定钻井液技术[J]. 钻井液与完井液,2023,40(6):725-732 doi: 10.12358/j.issn.1001-5620.2023.06.005
WU Xiaohong, CHEN Jinxia, WANG Xianbo, et al.Drilling Fluid Technology for Stabilizing the Borehole Penetrating the Shasanyi Sub-member in Block NP-280 in Jidong Oilfield[J]. Drilling Fluid & Completion Fluid,2023, 40(6):725-732 doi: 10.12358/j.issn.1001-5620.2023.06.005
Citation: WU Xiaohong, CHEN Jinxia, WANG Xianbo, et al.Drilling Fluid Technology for Stabilizing the Borehole Penetrating the Shasanyi Sub-member in Block NP-280 in Jidong Oilfield[J]. Drilling Fluid & Completion Fluid,2023, 40(6):725-732 doi: 10.12358/j.issn.1001-5620.2023.06.005

冀东NP280 Es31井壁稳定钻井液技术

doi: 10.12358/j.issn.1001-5620.2023.06.005
基金项目: 国家自然基金-面上项目“深井、超深井水基钻井液失水造壁性与流变性调控机理研究” (52274008);国家重点研发计划课题“井筒稳定性闭环响应机制与智能调控方法”(2019YFA0708303)。
详细信息
    作者简介:

    吴晓红,高级工程师,1982年生,现在从事钻井液技术研究工作。电话13513338493;E-mail:jdzc_wuxh@petrochina.com.cn。

  • 中图分类号: TE254.6

Drilling Fluid Technology for Stabilizing the Borehole Penetrating the Shasanyi Sub-member in Block NP-280 in Jidong Oilfield

  • 摘要: 针对冀东油田南堡280区块多口井钻遇至沙三1亚段(Es31)时发生井壁失稳,研究表明区块内泥岩遇水易产生水化作用,其漏失段间裂缝发育,裂缝多为中高角度裂缝,原裂缝宽度(0.1~100 μm)受压力等诱导因素后变大导致成为致漏性裂缝漏失频繁,同时也会诱发大规模的掉块从井壁上剥落进而导致了井下的坍塌卡钻等井下复杂问题。对南堡280区块破碎地层进行井壁稳定机理、评价方法的相关研究,以原三开抗高温抑制钻井液为基础,进行室内优化实验,构建了适合诱导性裂缝地层的强封堵性井壁稳定钻井液,现场应用表明该钻井液体系可有效防止Es31地层的坍塌失稳问题,具有重大的推广应用意义。

     

  • 图  1  沙河街组全岩矿物组成

    图  2  沙河街组黏土矿物组成

    图  3  工区岩样微观结构图

    图  4  NP283成像测井图

    图  5  NP2-66井裂缝开度图

    图  6  NP280区块各井裂缝宽度分布比例图

    图  7  刚性封堵剂单剂优选实验结果

    图  8  刚性封堵剂复配优选实验结果

    图  9  不同浓度刚性封堵剂复配优选实验结果

    图  10  模拟岩心3D模型图

    图  11  基浆承压能力提高量

    图  12  井浆承压能力增量

    图  13  改进前后钻井液作用下硬度

    图  14  钻井液作用下的地层坍塌压力分布

    表  1  微纳米封堵剂优选实验结果

    封堵剂AV/
    mPa·s
    PV/
    mPa·s
    YP/
    Pa
    YP/PV/
    Pa/mPa·s
    FLHTHP/
    mL
    基浆3323100.4342.4
    1% FT-3423826120.4622.1
    1% EP-23524110.4591.8
    2% EP-23925120.4801.3
    3% EP-24226130.5001.6
    1% CMJ-23625110.4401.9
    1%乳化沥青3826120.4622.0
    1% 氨基聚醇3524110.4582.2
    1%白沥青3725120.4801.9
    下载: 导出CSV

    表  2  NP280钻井液改进前后钻井液性能对比

    实验条件ρ/
    g·cm-3
    FV/
    s
    AV/
    mPa·s
    PV/
    mPa·s
    YP/
    Pa
    YP/PV/
    Pa/mPa ·s
    FLHTHP/
    mL
    pH
    井浆
    (改进前)
    1.41574735150.38510.88.7
    井浆
    (改进后)
    1.42575236150.4207.68.8
    老化16 h
    (改进前)
    1.41565138180.37511.28.8
    老化16 h
    (改进后)
    1.41565237150.4057.88.9
    老化24 h
    (改进前)
    1.41565239180.36011.88.8
    老化24 h
    (改进后)
    1.41565437170.4608.18.9
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-05-20
  • 修回日期:  2023-06-05
  • 录用日期:  2023-06-20
  • 刊出日期:  2023-12-30

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