ОСОБЛИВОСТІ НАФТОГАЗОНОСНОСТІ НАДР РЕГІОНІВ УКРАЇНИ ТА ПЕРСПЕКТИВИ ЇХ ОСВОЄННЯ. СХІДНИЙ НАФТОГАЗОНОСНИЙ РЕГІОН

The peculiarities of the oil and gas content of subsoil for the Eastern Region of Ukraine are considered. Important criteria related to the conditions of generation, migration, accumulation and preservation of the hydrocarbons are characterized. Their importance is shown in the forecasts of new oil and gas fields. The ranges of industrial oil and gas content of the subsoil have been determined and their connection with industrial hydrocarbon reserves in productive complexes has been established. As a result, priority intervals in productive complexes for priority geological exploration were allocated. The main one for new discoveries in the region, looking at the balance reserves of industrial categories, remain the Upper Visean complex at depths of 3–4 km. The significant (48%) residual hydrocarbon potential of the region expands the priority range of depths of this complex from 4 to 7 km. Mostly gas-condensate deposits of 43 Dnieper-Donets Basin fields lie deeper than 5 km, more than half of which are located in the Upper Visean complex, in particular, in the sediments of ХІІ and ХІІа microfaunistic horizons of Glinsk-Solokhivsk oil and gas bearing district. It is in this part of the Dnieper-Donets Basin that the main patterns of oil and gas content of deeply submerged geological formations were revealed for the first time: the secondary nature of reservoirs, the discovery of the phenomenon of superreservoirs and the associated significant hydrocarbon production. Promising zones of intensive oil and gas accumulation associated with both hydrocarbons of traditional reservoirs and central-basin gas in dense reservoirs have been identified. The main direction of geological exploration in the region is associated with the megacomplex of the Lower Carboniferous at depths of more than 4 km in the Central segment of the Dnieper-Donets Basin. Promising territories within of oil and gas promising lands of the region require increased attention and study by parametric drilling and seismic exploration. This will favour the increase in industrial hydrocarbon reserves. The Eastern region will remain the leading in terms of hydrocarbon production in the near future. According to the features of geological structure, the full development of the oil and gas bearing complexes and variety of hydrocarbon trap types the region is unique with high potential opportunities.