Microbubbles Enhanced Oil Displacement in Deep Pores

The presence of deep pores allows the fluid to stop in them, and the presence of deep pores can lead to incomplete displacement of surface stains, which can lead to undesirable consequences in both petroleum engineering and skin cleaning. As a new and safe cleaning method, microbubbles have been found to have good application potential in the oil displacement process. In this study, microfluidic chips were constructed to simulate deep pores of different sizes on the surface. Through microscopic observation, we found that the microbubbles can not only break through the limit of fluid cleaning and enter the deep pores to change their liquid stagnation state, but also have good oil carrying capacity, so that the substances of deep pore can be efficiently removed. This study elucidates the mechanism of microbubble-enhanced oil displacement in deep pores, which is helpful for understanding the good cleaning ability of microbubbles and provides a theoretical basis for the application of microbubbles in surface cleaning.