386 PETROPHYSICS: RESERVOIR ROCK PROPERTIES _-_-- - - /--e 0 -= I - OIL, Kro ---- WATER, Krw I - OIL, Kro ---e WATER, Krw (b) Figure 6.10. Typical oil-water relative permeabilility curves for (a) water-wet and (b) oil-wet systems, respectively.