Abstract: In this study, Schlumberger Petrel software was used to evaluate an oil field in the Niger Delta area of Nigeria using digitized well and wire line log data from four wells owned by Chevron Nigeria Limited. Structural and property modeling of the reservoir were carried out. The structural modeling in Petrel workflow tools process deals with 3-dimensional faults and facies modeling while property modeling involves the distribution of petrophysical parameters in the three Dimensional (3D) window. Analysis and interpretation of result showed that the permeability distribution is a direct indication of the pore connectivity within the reservoir reflecting excellent results in the areas with high permeability and vis-versa. The dominant formation orientation is within southwest-northeast dip directions. These channel deposits contain packages of inclined heterolithic stratification, formed from sandstone and conglomerate. The combination of sealed granulation seams as well as closed fractures caused problems for fluid movement horizontally through the reservoir as they create compartments which were not link with each other. Since this phenomenon could lead to a drop in pressure in the production well, alternative injection oil well could be drilled to improve production. The untapped crude oil remaining in the study area could be tapped by drilling extra oil wells.