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压差激活密封剂的制备、密封性能及机理研究

幸雪松 许林 冯桓榰 刘书杰 许明标 陈侃

幸雪松, 许林, 冯桓榰, 刘书杰, 许明标, 陈侃. 压差激活密封剂的制备、密封性能及机理研究[J]. 钻井液与完井液, 2019, 36(6): 789-794. doi: 10.3969/j.issn.1001-5620.2019.06.023
引用本文: 幸雪松, 许林, 冯桓榰, 刘书杰, 许明标, 陈侃. 压差激活密封剂的制备、密封性能及机理研究[J]. 钻井液与完井液, 2019, 36(6): 789-794. doi: 10.3969/j.issn.1001-5620.2019.06.023
XING Xuesong, XU Lin, FENG Huanzhi, LIU Shujie, XU Mingbiao, CHEN Kan. A Differential Pressure Activated Sealant: Preparation, Sealing Performance and Working Mechanisms[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(6): 789-794. doi: 10.3969/j.issn.1001-5620.2019.06.023
Citation: XING Xuesong, XU Lin, FENG Huanzhi, LIU Shujie, XU Mingbiao, CHEN Kan. A Differential Pressure Activated Sealant: Preparation, Sealing Performance and Working Mechanisms[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(6): 789-794. doi: 10.3969/j.issn.1001-5620.2019.06.023

压差激活密封剂的制备、密封性能及机理研究

doi: 10.3969/j.issn.1001-5620.2019.06.023
基金项目: 

“中海油井完整性技术体系研究(二期)—海上气井完整性检测与封堵技术研究”(YXKY-2017-ZY-09);浙江省教育厅一般科研项目“新型压差激活密封剂的微缺陷自适应修复行为研究”(Y201840431);舟山市科技计划项目“海洋油气井密封损伤的压力控释靶向修复技术研发”(2019C21006)

详细信息
    作者简介:

    幸雪松,高级工程师,现在主要从事钻完井设计及管理工作。E-mail:xingxs@cnooc.com.cn

    通讯作者:

    许林,博士,现从事油田化学、计算化学等领域研究。E-mail:xuhu_11@yeah.net

  • 中图分类号: TE257.6

A Differential Pressure Activated Sealant: Preparation, Sealing Performance and Working Mechanisms

  • 摘要: 压差激活密封剂是一种具有自适应密封、施工简单、费用低等特点的新型密封体系,对于油气井管柱完整性的快速修复具有重要意义。笔者以羧基丁腈胶乳(XNBRL)、MgCl2、OP-10、VIS-B为原料,设计四因素四水平正交实验,考察了胶乳浓度、激活剂浓度、剪切速率、停搅时间对压差激活剂固相颗粒生长及微结构的影响,评价了压差激活剂的动态密封性能,分析了压差激活密封机理。结果表明,压差激活密封剂固相颗粒形貌规则,具有层级体型结构,粒径小于400 μm ;粒径生长影响顺序为:停搅时间>胶乳浓度>激活剂浓度>剪切速率;制备密封剂可在50℃、7.5 MPa压差下对0.5 mm×0.8 mm×10 mm微缺陷成功实施封堵;根据微粒形貌、分子聚集态结构及其射流场剪切形变行为,提出了密封流体在微缺陷压差作用下的液固转化力学-化学耦合构效模型,初步揭示了压差激活密封剂的自适应修复机理。

     

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出版历程
  • 收稿日期:  2019-09-08
  • 刊出日期:  2019-12-30

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