Wettability Alteration of Sandstone by Chemical Treatments

Figure 1

Water droplets on the surface of the sandstone cores before and after treatment with FC911.

(a) Water (without chemical treatment)

(b) Water (treated with 0.1% FC911, 𝜃=65^∘)

(c) Water (treated with 0.2% FC911, 𝜃=72^∘)

(d) Water (treated with 0.3% FC911, 𝜃=80^∘)

(e) Water (treated with 0.5% FC911, 𝜃=40^∘)

(f) Water (treated with 1.0% FC911, 𝜃=40^∘)