The aim of this study is to investigate the structural regime and reservoir characteristics of Bahariya Formation in Aghar oil field, North Western Desert, Egypt. The available data include twenty five seismic sections, well logging data of five wells and core data of two wells. The structural analysis involves the construction of structure contour maps, in terms of time and depth, on the tops of Baharyia and Alamein formations. These maps show three structural closures on the top of Baharyia Formation, due to folding, that are dissected by faults of ENE-WSW trend. These faults constitute a graben and two step-like faults. Two structural closures are encountered on the top of Alamein Dolomite, which is dissected by a larger number of faults having the same trend as that of Baharyia Formation. The well logging analysis of Baharyia Formation includes digitizing, data base editing, data corrections, formation evaluation and analysis using 3 D slicing. From the statistical analysis of the horizontal permeability and vertical permeability in Ag-2x and Ag 3x wells, it is concluded that the Bahariya Formation is a good to excellent reservoir. Estimation of permeability by neural network is significantly better than either optimal transformation or conventional parametric regression method. The reservoir characteristics and structural attitude of Baharyia Formation indicate that the most favorable places for oil production are the northern and northeastern parts of the area.