Experimental Study of the Microscopic Visualization of Gas Clogging during Groundwater Recharge

Clogging is one of the most important factors that restricts development and popularization artificial groundwater recharge technology. Gas clogging an but often overlooked form clogging. In this study, a high-speed image acquisition system was used to obtain high-resolution images migration water gas in pore. The bypass flow, trapped bubbles H-shaped pore channel, blind end, corner were directly observed their mechanisms analyzed. influences structure content on degree quantified. pore–throat size has certain controlling effect movement liquid phases. As diameter increases, decreases, relative permeability (krw) increases. ratio exhibits negative correlation with phase, sorting coefficient positive krw. more significant at low gas-to-liquid ratios (<1:2). These results provide theoretical support for scientific quantitative evaluation prediction occurrence projects.