Sweeping a wetting phase by non-wetting phase
Oil is non-wetting phase for the most non-petroleogenetic rocks and the initial saturation of rocks by oil is a drainage process under water sweeping
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| Fig. 1. Illustration of primary and secondary Drainage and Imbibition. |
See also
Physics / Fluid Dynamics / Percolation / Sweeping
[ Wettability ] [ Imbibition ]