The article describes the results of studies aimed at replenishing the resource base of the northwestern part of the Tomsk region and clarifying the ideas about the formation of deposits in the Traigorod-Kondakovskoye oil field. The possibilities of the applied basin modeling at the full cycle of exploration stages demonstrated. The research is divided into two stages. The first stage has a sub-regional coverage and includes an area of 25,000 km2. The site is confine to the Alexandrovsky arch, covers a part of the Koltogorsko-Nyurolsky trench and the eastern pericline of the Nizhnevartovsky arch. The basin submersion is reconstructed here and the thermal history is restored. The heterogeneity of the heat flow at the bottom of the sedimentary cover over the area is explained by tectonic processes and complicated by massive granite intrusion. At the first stage, a 3D model of the formation oil and gas basin were created and the tasks were the restoration of the generation history and the ideas about the migration routes of hydrocarbons formation. At the second stage, on the base of the sub-regional (parent) model, a local (daughter) model of the Traigorod-Kondakovskoye field formation was built on the area of 480 km2 covered by 3D seismic. The substantiation of the necessity is given and the description of the results of additional special geochemical studies of fluids and oil source rocks, carried out before the start of building a detailed model of the local stage, is presented. The following are the main parameters and the differences between the local and the parent model. Conclusions are made on the possibility of applying an assessment of faults permeability influence to the deposits formation. The forecast of trap saturation and resource potential assessment reduced the risks of exploration; recommendations for further geological study of the subsurface are proposed.
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