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

孟祥海 黎 慧 张云宝 邹 剑 郑双益 代磊阳

MENG Xianghai，LI Hui，ZHANG Yunbao，ZOU Jian，ZHENG Shuangyi，DAI Leiyang

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

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.