Quantifying the flow dynamics of supercritical CO2–water displacement in a 2D porous micromodel using fluorescent microscopy and microscopic PIV

摘要: Abstract The multi-phase flow of liquid/supercritical CO2 and water (non-wetting wetting phases, respectively) in a two-dimensional silicon micromodel was investigated at reservoir conditions (80 bar, 24 °C 40 °C). fluorescent microscopy microscopic particle image velocimetry (micro-PIV) techniques were combined to quantify the dynamics associated with displacement by (drainage) porous matrix. To this end, seeded tracer particles, tagged dye each phase imaged independently using spectral separation conjunction imaging. This approach allowed simultaneous measurement spatially-resolved instantaneous velocity field quantification spatial configuration two fluid phases. results, acquired sufficient time resolution follow dynamic progression both provide comprehensive picture physics during migration front, temporal evolution individual menisci, growth fingers within microstructure. During that process, jumps 20–25 times larger magnitude than bulk measured these bursts occurred in-line against direction. These unsteady events support notion pressure Haines pore drainage as previously reported literature [1–3]. After passage shear-induced detected trapped ganglia form circulation zones near CO2–water interfaces well thin films surfaces micromodel. our knowledge, results presented herein represent first quantitative spatially temporally resolved velocity-field measurements high for injection