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有机缓释微乳酸解卡剂的制备及其性能影响因素

陈明 蓝强 贾江鸿 黄维安 王雪晨 李秀灵

陈明,蓝强,贾江鸿,等. 有机缓释微乳酸解卡剂的制备及其性能影响因素[J]. 钻井液与完井液,2023,40(6):742-748 doi: 10.12358/j.issn.1001-5620.2023.06.007
引用本文: 陈明,蓝强,贾江鸿,等. 有机缓释微乳酸解卡剂的制备及其性能影响因素[J]. 钻井液与完井液,2023,40(6):742-748 doi: 10.12358/j.issn.1001-5620.2023.06.007
CHEN Ming, LAN Qiang, JIA Jianghong, et al.Preparation and affecting effects of a slow-releasing organic microemulsified acid pipe-freeing agent[J]. Drilling Fluid & Completion Fluid,2023, 40(6):742-748 doi: 10.12358/j.issn.1001-5620.2023.06.007
Citation: CHEN Ming, LAN Qiang, JIA Jianghong, et al.Preparation and affecting effects of a slow-releasing organic microemulsified acid pipe-freeing agent[J]. Drilling Fluid & Completion Fluid,2023, 40(6):742-748 doi: 10.12358/j.issn.1001-5620.2023.06.007

有机缓释微乳酸解卡剂的制备及其性能影响因素

doi: 10.12358/j.issn.1001-5620.2023.06.007
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:

    陈明,高级工程师,1979年生,毕业于石油大学(北京)石油工程专业,现在从事钻井工程设计方面的研究工作

    通讯作者:

    蓝强,研究员。E-mail:mlanqiang@163.com

  • 中图分类号: TE254 TE285

Preparation and Affecting Effects of a Slow-Releasing Organic Microemulsified Acid Pipe-Freeing Agent

  • 摘要: 针对当前钻井用解卡剂存在反应速度过快,容易发生漏失,从而导致解卡失败的问题,优选表面活性剂和酸液类型及其配比,制备出有机缓释微乳酸解卡剂最优配方:AQAS∶NP=2∶1,正丁醇∶正辛醇 =1∶1,水相∶油相=23∶77,助表面活性剂∶表面活性剂=1∶3,乙酸∶氢氟酸=3∶1,体系为W/O型微乳酸,该配方酸液的包埋率为23%。在地层影响因素中,温度对其性能的影响显著,在高温高压下,酸液释放速度迅速增加;在钻井液处理剂因素中,加重剂、黏土和超细碳酸钙对微乳酸影响最大,微乳酸完全破乳,形成悬浊液。通过现场5口井试验发现,该解卡剂可解除黏附卡钻、沉砂卡钻和掉块卡钻多种类型卡钻事故,一次解卡成功率为100%。

     

  • 图  1  AQAS+NP复合表面活性剂制备的微乳液拟三元相图

    图  2  染色法鉴定缓释微乳酸的结构

    图  3  压力对有机缓释微乳酸解卡剂稳定性的影响

    注:从左到右压力依次为1、3、5、7、9 MPa。

    图  4  不同温度压力对泥饼清除能力的影响

    图  5  不同pH值对有机缓释微乳酸解卡剂的影响

    图  6  加入不同盐溶液后微乳酸的粒径分布图

    图  7  LV-PAC对微乳酸形成的影响

    图  8  K-PAM对微乳酸形成的影响

    图  9  不同固相颗粒对微乳酸形成机制的影响

    表  1  压力对有机缓释微乳酸解卡剂电导率和岩屑溶蚀率(6 h)的影响   

    P/
    MPa
    电导率/
    µs·cm−1
    溶蚀率/
    %
    P/
    MPa
    电导率/
    µs·cm−1
    溶蚀率/
    %
    0.1110124.95100729.5
    189626.27105630.8
    392827.8997531.6
    下载: 导出CSV

    表  2  不同溶液对有机缓释微乳酸解卡剂岩屑溶蚀率的影响

    NaCl/%不同时间下的溶蚀率/%
    1 h2 h3 h4 h
    019.921.924.226.2
    2.529.631.433.635.8
    下载: 导出CSV

    表  3  LV-PAC对有机缓释微乳酸解卡剂岩屑溶蚀率的影响

    LV-PAC/
    %
    不同时间下的溶蚀率/%
    1 h2 h3 h4 h
    019.921.924.226.2
    0.421.423.625.026.2
    下载: 导出CSV
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  • 收稿日期:  2023-06-11
  • 修回日期:  2023-07-20
  • 刊出日期:  2023-12-30

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