Description: Wetting in pores. In a water-wet case (left), oil remains in the center of the pores. The reverse
condition holds if all surfaces are oil-wet (right). In the mixed-wet case, oil has displaced water from
some of the surfaces, but is still in the centers of water-wet pores (middle). The three conditions
shown have similar saturations of water and oil.
Source: Wael Abdallah: Fundamentals of Wettability (Schlumberger)
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