In order to achieve the maximum hydrocarbon recovery, it is vital to reliably predict future production figures, select both reasonable production rates and recovery techniques during oilfields life. For this purpose AB “Geonafta” geologists and reservoir engineers make geological fields models and reservoir simulations using respective software Geographix and Eclipse-100. With the aid of those models new production wells are designed, production scenarios are planned, pressure drive mechanisms are derived and the necessity of injection wells is determined, etc. The results of modeling help to choose the intensification methods for each well, as well as to improve the overall production from the oil-field and to reevaluate the geological and recoverable reserves of the oilfield.