Reservoir characterization using porosity–permeability relations and statistical analysis: a case study from North Western Desert, Egypt

Abstract

The main objective of this work is to evaluate the petrophysical characteristics of Alam-El Bueib reservoirs (AEB-3E, AEB-3D, and AEB-3A) in North Western Desert, Egypt, where they are important targets in this area. Core plugs laboratory measurements (porosity and permeability) of about 275 core samples of these reservoirs in TUT-1X well are used to achieve reservoir petrophysical evaluation. The core data analysis involves the construction of histograms, relations, and statistical analysis for porosity and permeability of these reservoirs. The statistical analysis and histograms of AEB-3E porosity indicate a good to very good homogenous reservoir with mean values 16 and 18 % for helium and fluid summation porosities, respectively. The horizontal and vertical permeability are very good with mean values 835.5 and 429.25 md, indicating high-quality reservoir. The study of AEB-3D indicates good and heterogeneous reservoir with mean values 10 %, 80.66 and 59.28 md for porosity, horizontal, and vertical permeability, respectively. AEB-3A reservoir reflects a good to very good homogeneous porosity and very good to excellent permeability with mean values 14 %, 299.75 and 184.32 md for porosity, horizontal, and vertical permeability. Concerning the three reservoirs, the helium-fluid porosity relations and the horizontal-vertical permeability relations give positive trends with strong correlation coefficients ranging from 0.51 to 0.93 which give the ability to calculate one parameter from the other.