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准噶尔盆地硬脆性页岩强化致密封堵水基钻井液技术

刘均一 柴金鹏 李光泉 王宝田

刘均一,柴金鹏,李光泉,等. 准噶尔盆地硬脆性页岩强化致密封堵水基钻井液技术[J]. 石油钻探技术,2022, 50(5):50-56 doi: 10.11911/syztjs.2022022
引用本文: 刘均一,柴金鹏,李光泉,等. 准噶尔盆地硬脆性页岩强化致密封堵水基钻井液技术[J]. 石油钻探技术,2022, 50(5):50-56 doi: 10.11911/syztjs.2022022
LIU Junyi, CHAI Jinpeng, LI Guangquan, et al. Enhanced tight plugging water-based drilling fluid technology for hard and brittle shales in Junggar Basin [J]. Petroleum Drilling Techniques,2022, 50(5):50-56 doi: 10.11911/syztjs.2022022
Citation: LIU Junyi, CHAI Jinpeng, LI Guangquan, et al. Enhanced tight plugging water-based drilling fluid technology for hard and brittle shales in Junggar Basin [J]. Petroleum Drilling Techniques,2022, 50(5):50-56 doi: 10.11911/syztjs.2022022

准噶尔盆地硬脆性页岩强化致密封堵水基钻井液技术

doi: 10.11911/syztjs.2022022
基金项目: 中国石化集团科技攻关项目“新型高性能环保水基钻井液技术研究”(编号:JP18038-12)部分研究内容
详细信息
    作者简介:

    刘均一(1988—),男,山东淄博人,2010年毕业于中国石油大学(华东)石油工程专业,2016年获中国石油大学(华东)油气井工程专业博士学位,高级工程师,主要从事油田化学与环保新技术方面的研究工作。E-mail:danielliu1988@126.com

  • 中图分类号: TE254+.6

Enhanced Tight Plugging Water-Based Drilling Fluid Technology for Hard and Brittle Shales in Junggar Basin

  • 摘要:

    为解决准噶尔盆地硬脆性页岩地层井壁失稳的问题,在分析准噶尔盆地硬脆性页岩矿物组成与组构特征的基础上,根据多元协同井壁稳定理论,提出了以多尺度致密封堵为核心的协同稳定井壁技术对策,构建了多尺度致密封堵水基钻井液YHDF-1和YHDF-2。矿物组成和组构特征分析结果得知,准噶尔盆地硬脆性页岩地层井壁失稳与“微裂缝–裂隙–孔隙”的多尺度特征密切相关,加强封堵微纳米尺度缝隙,提高抑制页岩表面水化的能力,发挥合理密度钻井液有效应力支撑井壁的作用,才能协同强化稳定井壁。性能评价结果表明,多尺度致密封堵水基钻井液YHDF-1和YHDF-2可耐150 ℃高温,其400 mD砂盘的PPA滤失量分别为17.8和13.2 mL,可使页岩的渗透率降低90%以上。钻井液YHDF-1和YHDF-2分别在准噶尔盆地的D-72井和D-12井进行了现场试验,钻井过程中均未出现井壁失稳现象,试验井段平均井径扩大率均小于10.0%,电测均一次成功。研究和现场试验结果表明,多尺度致密封堵水基钻井液YHDF-1和YHDF-2具有优异的封堵防塌性能,可以解决准噶尔盆地硬脆性页岩地层井壁失稳的问题。

     

  • 图 1  硬脆性页岩的微观结构

    Figure 1.  Microstructure of hard and brittle shales

    图 2  硬脆性页岩的氮气吸附孔径分布曲线

    Figure 2.  Pore size distribution curve of nitrogen adsorption in hard and brittle shales

    图 3  钻井液渗透性封堵性能评价结果

    Figure 3.  Evaluation results of permeability and plugging performance of drilling fluids

    图 4  压力传递曲线

    Figure 4.  Pressure transmission test curves

    表  1  准噶尔盆地清水河组、头屯河组页岩全岩矿物分析结果

    Table  1.   Whole-rock mineral analysis results of shales from Qingshuihe Formation and Toutunhe Formation in Junggar Basin

    地层全岩矿物含量,%脆性
    指数
    石英斜长石方解石白云石菱铁矿赤铁矿黏土矿物
    清水
    河组
    30 8 2313530.4839
    32 9 242510.5424
    34 7 154490.5763
    头屯
    河组
    341510334310.6667
    3313 835380.6111
    291110528350.4833
    下载: 导出CSV

    表  2  准噶尔盆地清水河组、头屯河组页岩黏土矿物分 析结果

    Table  2.   Clay mineral analysis results of shales of Qingshuihe Formation and Toutunhe Formation in Junggar Basin

    地层黏土矿物相对含量,%
    高岭石绿泥石伊利石伊/蒙混层间层比
    清水河组1029775
    1019870
    2019775
    头屯河组2378865
    2398665
    2359070
    下载: 导出CSV

    表  3  钻井液流变性和滤失性评价结果

    Table  3.   Evaluation results of rheology and filtration of drilling fluids

    配方测试
    条件
    表观黏度/
    (mPa·s)
    塑性黏度/
    (mPa·s)
    动切力/
    Pa
    静切力/
    Pa
    API滤失量/mL高温高压滤失量/mLpH值
    YHDF-1老化前78.063.514.53.5/8.51.611
    老化后64.054.010.02.5/7.51.45.810
    YHDF-2老化前78.064.014.06.0/12.02.011
    老化后74.063.011.05.0/9.51.46.410
    注:老化条件为在温度150 ℃下滚动16 h,高温高压滤失量测试条件为150 ℃/3.5 MPa。
    下载: 导出CSV
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  • 收稿日期:  2021-12-07
  • 修回日期:  2022-04-04
  • 网络出版日期:  2022-11-04

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