The present study deals with petrophysical analysis and electrofacies zonation of the Nullipore carbonate
reservoir rocks of Ras Fanar filed, Gulf of Suez-Egypt. The wire line logs of 14 wells, the available
capillary pressure data, and the special core analyses of some cored intervals, as well as the coralline
algae content, were analyzed and interpreted together for reservoir evaluation and zonation. Three electrolithofacies
zones (I, II, and III) are detected. However, zone (II) is considered the most important, in
terms of the high porosity (18%) and hydrocarbon saturation (80%), which it attains. The petrophysical
analysis of the Nullipore reservoirs shows two lobes (A and B) of good hydrocarbon potentialities,
extending along northwest-southeast direction. However, “B” lobe attains better reservoir quality than
“A” lobe. Net pay cutoff values of 14% and 65% are taken for porosity and water saturation, respectively.