North Geisum oil field is located southeast of the Zeit bay at the offshore southern part of Gulf of Suez; it covers an area of about 30 km2 where many hydrocarbon traps producing oil from different reservoirs of different geological ages (Lower Cretaceous to the Miocene) are encountered.
Kareem Formation in North Geisum oil field has been divided into two members (from top to bottom) Shagar and Rahmi members.
This study aims to evaluation of reservoir properties is the estimation of hydrocarbons in the porous zones encountered in the Miocene sequence Shagar Cap, Shagar Sand, Rahmi Clastics, Rahmi Sand beds from North Geisum oil field penetrated by four wells in the study area as revealed using schlumberger software, Interactive PetrophysicsTM (IP), Then data represented through vertical and horizontal distribution.
Vertical distribution of the petrophysical parameters were represented by a number of litho-saturation crossplots of the Kareem members for each well to show the vertical variation of the lithology, porosity and their hydrocarbon contents. Horizontal distribution of the petrophysical parameters such as shale volume (Vsh), fluid saturations (Sh), total and effective porosities (Φt and Φe) were represented by a number of isoparametric maps.
The estimated petrophysical parameters of the reservoir throughout the study area range between about 12% and 22.5 % for effective porosity, 5 % and 22 % for shale volume and between 55 % and 84% for hydrocarbon saturation. This indicates that Shagar and Rahmi sands in this field can be considered as good reservoirs with high potential for oil production