The drag reduction characteristics of hydrophobic nanoparticles adsorption core surface and the prediction of slip lengths

摘要

The slip model of micro channel in reservoir adsorbed by hydrophobicnanoparticles(HNPs) was established. The drag reduction characteristics were verified by the coreslice adsorption experiment and core displacement experiment respectively. Results show that acompact HNPs adsorption layer can be built on the surfaces of the micro channel and the wettabilityof the surfaces can be changed from hydrophilic into strong hydrophobic.