Combined Spatially Resolved and Non-resolved 1H-NMR Relaxation Analysis to Assess and Monitor Wettability Reversal in Carbonate Rocks

Wettability is a petrophysical property that directly affects oil recovery by controlling the location, flow and distribution of<br>fluids inside the reservoir. In this study it has been verified that a polar interaction mechanism to change wettability of a<br>carbonate rock from water-wet to oil-wet by acid adsorption onto the rock surface can be obtained by injecting adequate<br>chemicals, and in particular oleic acid dissolved in non-polar oil, like Soltrol® 170 used for laboratory experiments.