الفهرس 
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Abstract
The Cenomanian Bahariya reservoir is an attractive petroleum exploration target in north Western Desert. The present work deals mainly with the interpretation of geological and petrophysical data to evaluate the hydrocarbon potential of the Bahariya reservoir in the Um Baraka oil field. This achieved by constructing subsurface maps (isopache, Sandstone isolith, Siltstone isolith, Limestone isolith, Triangle facies, Clastic/Non Clastic ratio and Sand/Shale ratio) to show the areal variation of the lithostratigraphic unit and interpretation of environmental condition of the study area. All the results of Petrophysical parameters are represented vertically as litho saturation cross-plots and laterally in different iso-parametric maps, such as effective porosity, Shale content, net-pay thickness and hydrocarbon saturation variation maps. These maps revealed that the promising hydrocarbon bearing zones are characterized by their clay content range from 1.7% to 21.4%, effective porosity ranges from 13.2% to 19.7%, net pay thickness range from 7.5 feet to 15.5 feet., and hydrocarbon saturations range from 39.3% to 68.3%.