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有机缓释微乳酸高效解堵剂的制备及性能研究

何立成 蓝强 黄维安 王雪晨 尚术芳 李秀灵

何立成,蓝强,黄维安,等. 有机缓释微乳酸高效解堵剂的制备及性能研究[J]. 钻井液与完井液,2022,39(2):259-264 doi: 10.12358/j.issn.1001-5620.2022.02.021
引用本文: 何立成,蓝强,黄维安,等. 有机缓释微乳酸高效解堵剂的制备及性能研究[J]. 钻井液与完井液,2022,39(2):259-264 doi: 10.12358/j.issn.1001-5620.2022.02.021
HE Licheng, LAN Qiang, HUANG Wei’an, et al.Preparation and properties of slow-release organic acid micro-emulsion with high efficient plugging removal[J]. Drilling Fluid & Completion Fluid,2022, 39(2):259-264 doi: 10.12358/j.issn.1001-5620.2022.02.021
Citation: HE Licheng, LAN Qiang, HUANG Wei’an, et al.Preparation and properties of slow-release organic acid micro-emulsion with high efficient plugging removal[J]. Drilling Fluid & Completion Fluid,2022, 39(2):259-264 doi: 10.12358/j.issn.1001-5620.2022.02.021

有机缓释微乳酸高效解堵剂的制备及性能研究

doi: 10.12358/j.issn.1001-5620.2022.02.021
基金项目: 中石化工程公司课题“有机缓释酸解卡剂的研制与应用”(SG19-78K)和中石化课题“复合盐水微乳液研究与应用”(JP20004)部分研究内容
详细信息
    作者简介:

    何立成,高级工程师,1972年生,毕业于石油大学(华东)钻井专业,现在从事钻井工程及科研管理工作

    通讯作者:

    蓝强,高级工程师,E-mail:mlanqiang@163.com

  • 中图分类号: TE257.6

Preparation and Properties of Slow-release Organic Acid Micro-emulsion with High Efficient Plugging Removal

  • 摘要: 针对油田常用酸化方法存在酸液剖面不均匀和二次伤害的问题,优选有机酸和无机酸形成复合酸,优选表面活性剂和助表面活性剂,制备出有机缓释酸微乳液,其最优配方为:AQAS∶AEO=1∶1, 正丁醇∶正辛醇 =1∶1,水相∶油相=3∶7,助表面活性剂︰表面活性剂=1∶2,乙酸∶氢氟酸=4∶1。该体系的泥饼清除率超过85%,在低渗岩心中解堵效果显著,其渗透率恢复值超过100%。

     

  • 图  1  不同酸液条件下AQAS+AEO表面活性剂复配的微乳液拟三元相图

    注:C、O、S分别表示酸相、油相、表面活性剂,其值均为每相占三相总和的比例

    图  2  微乳酸M-1的外观(左)及染色法鉴定微乳酸结构(右)

    图  3  不同酸形成的微乳酸(左)及   染色法鉴定微乳酸结构(右)

    图  4  M-1体系在不同含水量下的电导率值

    图  5  酸液对岩屑的溶蚀实验

    图  6  高温高压动态泥饼的清除效果

    图  7  现场钻井液污染前(左)、污染后(中)和有机缓释微乳酸解堵后(右)的岩心照片

    表  1  不同配方酸液对岩屑的溶蚀率

    岩屑编号有机酸液配方溶蚀率/%
    1 h2 h3 h4 h
    1#12%CH3COOH+2%HF3.56.19.611.8
    12%CH3COOH+4%HF5.28.612.514.6
    16%CH3COOH+2%HF7.610.314.517.7
    16%CH3COOH + 4%HF10.514.918.422.9
    12%CH3COOH + 2%HCl2.85.37.510.1
    12%CH3COOH + 4%HCl3.98.210.512.3
    16%CH3COOH + 2%HCl7.012.413.716.2
    16%CH3COOH + 4%HCl9.515.617.220.1
    2#12%CH3COOH+2%HF33.337.742.544.6
    12%CH3COOH+4%HF36.839.544.149.4
    16%CH3COOH+2%HF47.952.254.758.1
    16%CH3COOH + 4%HF56.259.361.566.9
    12%CH3COOH + 2%HCl22.429.938.643.7
    12%CH3COOH + 4%HCl24.732.941.649.1
    16%CH3COOH + 2%HCl25.135.045.356.6
    16%CH3COOH + 4%HCl28.839.648.964.6
      注:1#岩屑矿物:38%石英、13%钾长石、22%方解石、
    12%白云石、2%黄铁矿、5%重晶石、8%黏土;2#岩屑矿物:8%石英、3%钾长石、81%方解石、5%白云石、1%黄铁矿、2%黏土
    下载: 导出CSV

    表  2  工作液对渗透率的影响实验结果

    工作液实验
    条件
    渗透率/
    mD
    渗透率恢复值/
    %
    现场钻井液污染前0.1732
    污染后0.062936.32
    微乳酸M-1解堵后0.2588149.42
    下载: 导出CSV
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  • 收稿日期:  2021-10-29
  • 修回日期:  2021-12-12
  • 录用日期:  2021-10-29
  • 刊出日期:  2022-06-23

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