Abstract: In order to evaluate the adaptability of nanometer microspheres to the Pubei Test Block, laboratory experiment study based on the nanometer microspheres profile controlling and flooding mechanism was carried out. The experimental results showed that nanometer microspheres dissolved in oilfield sewage owned a good dispersion, and its median grain diameter can meet the plugging requirement. When the solution concentration was 2 000 mg/L, nanometer microspheres hydration swelling effect was the best, and its multiple expand reached 5.7 after thirty days. The final oil recovery was raised by 10% by nanometer microspheres profile control and displacement. It was concluded that nanometer microspheres could plug the high permeability layer of nonhomogeneous formation. The experimental results can provide theoretical bases and technological support for enhance oil recovery of low permeability reservoir．

Key words: Nanometer microspheres, Hydration swelling, Sealing characteristics, Oil displacement profile control agent

摘要： 为探究纳微米微球调驱剂与葡北油田L区块的适应性,在纳微米微球深部调驱机理的基础上,开展了纳微米微球室内性能评价实验。结果表明,纳微米微球在油田回注污水中具有较好的分散性,其水化膨胀后的粒径中值满足对L区块地层的封堵要求。当纳微米微球质量浓度为2000mg/L时,水化膨胀效果最好,其水化膨胀30d后的膨胀倍率达到5.7。纳微米微球调驱实验使最终采收率提高了10%,说明纳微米微球可以对非均质地层中的高渗层进行封堵。

关键词: 纳微米微球, 水化膨胀, 封堵性, 调驱剂