A Novel Tripod Methodology of Scrutinizing Two-Phase Fluid Snap-Off in Low Permeability Formations from the Microscopic Perspective

According to the requirements of carbon-neutral development, this study explores comparison and new discussion replacing nitrogen with carbon dioxide in conventional two-phase microfluid flow. Thus, application various fields can be more precise convenient. This research uses an artificially continuously tapering micro model mimic natural rock channel low permeability formation, where liquid imbibition process is entirely under surface tension-dominant. The tested capillary number decreased 8.49 × 10−6, thinnest observed film was reduced 2 μm. results two gas groups (nitrogen dioxide) show that CO2 fluid microscopic porous media would have tendency snap off leave fewer residual bubbles blocked between constrictions. However, N2 forms smaller isolated after snap-off. By combining experimental data numerical output theoretical evolution equation by Beresnev Deng Quevedo Tiznado et al., interface radius, temporal pressure, velocity profiles for axisymmetric models are presented validated. Those findings create a paradigm future studies multiphase enhance deeper understanding geological underground properties greenhouse storage utilization formations.