Previous | Close | Next
Figure F58. Water saturation from Archie's equation and LWD porosity and resistivity logs. Shaded intervals correspond to hole enlargements, where the measured density is erroneously low and the calculated water saturation is unreliable. Rw = formation water resistivity, m = cementation coefficient, R0 = computed formation resistivity for 100% water saturation, Rt = measured resistivity, Sw = water saturation, RAB = resistivity-at-the-bit image obtained by the GeoVISION tool.
Previous | Close | Next | Top of page