Hydrodynamics of gas-liquid displacement in porous media: Fingering pattern evolution at the breakthrough moment and the stable state

Momentum transport of morphological instability in fluid displacement with changes in viscosity

“…Interfacial instabilities in fluid displacements have attracted attention in diverse applications, such as chromatographic processes, 1,2 transport processes of stomach acid, 3 coating processes, 4 enhanced oil recovery processes, 5,6 and CO 2 sequestration. 7,8 Saffman-Taylor instability is a viscosity difference-driven instability that occurs when a less viscous fluid displaces a more viscous fluid. 9 As the viscosity difference increases, the stable interface grows in a finger-like pattern, referred to as viscous fingering (VF).…”

Flow Patterns and Pore Structure Effects on Residual Oil during Water and CO2 Flooding: In Situ CT Scanning

“…The displacement experiment is an effective method for exploring both flow patterns and the efficiency of utilization by employing microfluidic models, − real sandstone models, ,,, and technologies such as nuclear magnetic resonance, − laser confocal techniques, − and CT scanning technology. − CT scanning technology has emerged as a significant method used in various fields, including but not limited to enhanced oil recovery (EOR), − carbon dioxide storage, , environmental remediation, , and reservoir modeling at the pore scale. − The nondestructive and high-accuracy evaluation offered by CT scanning technology places it at the forefront of the choices for the study of the flow pattern and distribution of residual oil. For example, Zhang et al utilized in situ CT scanning and QEMSCAN to acquire multicomponent 3D digital models and investigate the impact of wetting on microscale residual oil.…”