Petrophysical Charaterizations of Some Reservoir Formations in Ghani Oilfield, Libya

Abstract

This study has been conducted on three types of reservoir rocks for core analysis of samples denoted by R-1, R-2 and R-3 of Ghani oil field from three reservoir include Farrud, Facha and Mabruk formations respectively. This analysis includes determination of physical characteristics e. g. porosity ( ), permeability (k), formation factor (FF) and resistivity index (RI). The purpose of this study is to how core petrophysical data might be most investigating effectively applied to the petrophysical prediction of petrophysical properties from core samples analysis. For Farrud reservoir of R-1 shows that the relation between degree of saturation ( ) and relative oil permeability(Kro) equal the relative permeability of water(Krw) at which the intersection point between the two curves ; whereas, the flow with the same rate. FF and RI are vary with and the RI is a function of . The gas-oil relative permeability have been expressed graphically. Whereas, the intersection point between the two curves (Kro) equal the (Krg), at which both oil and gas are flow with the same rate. A similar results were obtained from Facha reservoir, R-2. The petrophysical properties of core samples for R-3 of Mabruk Formation have been performed including , k, and . The comparison between the three reservoirs by correlation between the average values such as , k, grain density and RI; shows that the average of Mabruk reservoir k greater than the other two reservoirs, while the other properties seem to be close together.