This study aimed to exploring and examining the Reservoir Modeling of the Nahr umr Formation at Luhais oil field. Based on the interpretation of the open hole data from wells (Lu-05, Lu-06, Lu-07, Lu-10, Lu-18, and Lu-20) .Which have been calculated Shale Volume, total porosity, Primary and secondary porosity, water and hydrocarbon saturation and Bulk water oil volume. Depends on the calculated of petrophysical properties, Nahr umr Formation can be divided into two members(in the Upper Shale member and in the Lower Sandstone member) according to the main lithology (Shale Volume), The contact between both is marked N/2. Each of these members is further subdivided into units (a, b, c, d, and e Units) in the upper Shale member, and (A1, B1, C1, D1, E1, F1, G1, H1, I1, and J1 Units) in the Lower Sand member. Three-dimensional reservoir model of oil saturation was constructed using the Petrel Software, (2009). Distribution of these petrophysical properties for each reservoir unit within the studied field has been done. The results showed that the best reservoir units are the C1, E1 and G1 reservoir unit. Its worth mentioned here that the heterogeneity of the thicknesses of these units and its individual direction. In addition, observed that the oil saturation increases towards the north of the field at the well (Lu-07) and the center of the field at the well (Lu18).
