Fig. 3. Mean water saturations (a) at which u₁₁(0) reaches its minimum, S_m and (b) at which u₁₁(0) equals its value in saturated formation, S_c, as functions of the conductivities' ratio, K_r = K_g2/K_g1, for selected values of the cross-correlation coefficient, r_fa. P* = 0.2, K_g1 = 1 cm h^–1, ₁ = 0.01 cm^–1, = 0.25, = 5, µ = 1, and = 1.