文章摘要
自组装颗粒深部调堵体系的性能评价
Performance Evaluation of Self-assembled Particles System for In-depth Profile Control
  
DOI:
中文关键词: 覆膜颗粒  自组装体  深部调堵  封堵率  封堵机理
英文关键词: coated particles  self-assembled particles  in-depth profile control  plugging rate  plugging mechanism
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作者单位
孟祥海,黎 慧,张云宝,邹 剑,郑双益,代磊阳 中海石油(中国)有限公司天津分公司天津 塘沽 300452 
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中文摘要:
      为提高颗粒堵剂深部封堵作用,研究了一种双层覆膜的微米级自组装颗粒深部调堵剂的微观形貌、悬浮性能、封堵性能,并分析了该堵剂的封堵机理。研究结果表明:所制备的自组装颗粒为粒径 56.5~ 270.5 μm的圆球型颗粒,在聚合物溶液中具有良好的悬浮性能,质量分数 5%的自组装颗粒在 0.3%聚合物溶液中静置 20 h的悬浮率大于 90%;65℃下注入 1 PV 的自组装颗粒悬浮体系(质量分数为 5%自组装颗粒+0.2%聚合物)后对渗透率9000×10-3~ 15000×10-3μm2的岩心的封堵率均在 90%以上。自组装颗粒在封堵岩心中的分布状态表明:自组装颗粒具有填充封堵、黏接架桥封堵、黏连填充封堵功能。图 13表2参 12
英文摘要:
      In order to improve the in-depth profile control action of particulated plugging agent,the particle size,microstructure,suspension performance,plugging rate and blocking mechanism of the micro-scale self-assembled particles(MSSAP)with double layer coating,were studied by laboratory experiments. The results showed that the size of the prepared spherical self-assembled particles were 56.5—270.5 μm,and it had a good suspension performance in the polymer solution,suspension rate reaching 90% in a 0.3% polymer solution for 20 h. Block experiment showed that its plugging rate was above 90% after injection of self-assembled particles system(5% MSSAP + 0.2% polymer)at 65℃ into the cores with permeability of 9000 × 10-3—15000 × 10-3 μm2. The distribution state of MSSAP particles in the core after sealing showed that the plugging mechanism of the MSSAP were plugging,adhesive bridge blocking and adhesive filling.
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