摘要
通过将超疏水的纳米颗粒吸附在岩心表面，可以在岩心表面形成一层致密的纳米颗粒吸附层，吸附纳米颗粒后的岩心表面具有类荷叶表面的微纳米双重结构特征，纳米颗粒吸附层的存在可以将原来强亲水的岩心表面转化为强疏水状态，纳米颗粒分散液具有较为明显的减阻性能，岩心流动实验结果表明，经纳米颗粒分散液处理后的岩心最大降压幅度可达159％，平均降压幅度为73．4％。研究结果对纳米颗粒吸附法降压增注技术的开发具有重要意义。
Through adsorbing ultra hydrophobic nanoparticles on the surface of the core, a dense layer of nanopartieles adsorbed layer can be formed on the core surface, and after adsorpting nanoparticles, core surface had a miero nano dual structure cha,＇acteristic of the lotus leaf-like surface and then the wettability of core surface carl be changed from hydrophilic to strong hydrophobic. Nanoparticle dispersion has significant drag reduction performance Core displacement experimental results showed that the largest drag reduction extent could be up to 159%, and the average extent could be to 73.4%. The results have important significance to the studies of the HNPs drag reduction technology.
基金
国家自然科学基金项目（No.50874071）,国家863计划项目（2008AA062201）,上海市科委重点科技攻关计划项目（071605102）,上海高校创新团队建设项目,上海市教委科研创新项目（11CXY32）,上海领军人才基金项目.
关键词
岩心表面
纳米颗粒吸附层
表面特性
降压减阻
core surfaces
HNPs adsorption layer
surface properties
drag reduction
