J. G. Celauro, V. A. Torrealba, Z. T. Karpyn, K. A. Klise and S. A. McKenna Pore-scale multiphase flow experiments in bead packs of variable wettability Geofluids 14
The difference in saturation conditions preceding each injection cycle affected sweep efficiency. The residual saturation after the 1st displacement was higher than the residual saturation after 2nd displacement. Sweep efficiency was high in the uniform, strongly wetting sample. The spatial distribution of wettability in mixed-wet porous samples influenced the topology of residual saturation profiles.
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