This work explains how to evaluate the different perforation parameters of the production vertical oil wells by using well test reservoir description and perforation information. The necessary data have been collected from Hungarian oil wells including reservoir description data from the MOL Company files. Four vertical oil wells have been evaluated. The perforating guns data collected from the Schlumberger Company. Four perforating HSD guns were used with different charge and explosive load design.In this study, calculation method used to determine the perforation depth, the influence of the different composite skin effect (damage skin factor, crushed zone skin factor, and the perforation skin factor), than we evaluate the flow rate of the different kind of guns. We consider the most important parameters influence the productivity of the perforated vertical oil wells. We obtained the relationship between the perforation depth and the skin factor, the perforation depth and the flow rate, the skin factor and the flow rate, and we identify the different flow rate. After giving the detailed figures and results, we evaluate the results of the perforation work.In this work we proved that there is calculation method by which the flow rate of the vertical oil well can be estimated before the perforating. To have the best flow rate we should choose the right design of the perforation gun. Hungarian oil wells will improved their productivity by using high shut density guns. Flow rate evaluation needs a good knowledge of rock properties, and flow properties.