Differentiated assessment of the oil and gas potential of the sides of the Vilyui syneclise

The urgency of the issue of increasing the volume of the hydrocarbon raw material base in the Vilyui syneclise was noted. The lithological and stratigraphic characteristics of the Upper Paleozoic-Mesozoic syneclise deposits and are briefly given. The main oil and gas complexes are identified. Based on a model of the history of sedimentary rock subsidence in the Vilyui syneclise, the gradations of catagenesis and the intensity of oil and gas generation on the Permian and Lower Jurassic oil source deposits were determined. The potential of oil and gas generation of the Permian and Lower Jurassic oil source deposits was quantified. Taking into account the accumulation coefficient, it is concluded that deposits with total reserves of up to 10 billion tons of conditional hydrocarbons can be found on the territory of the Vilyui syneclise. The territory of the north-western side of the Vilyui syneclise was identified as the most promising for the discovery of gas fields. It is assumed that two types of traps on pinching-out structures may develop here. Based on the identification by V. D. Nalivkin (1971) of the confinedness of oil fields with inherited structures, the slopes of the Suntar, Munsky, and Yakut arches adjacent to the Vilyui syneclise as promising territories for the discovery of oil deposits were identified. The direct and indirect indicators of the oil cintent prospects of these territories are given. The need to queue up first-priority geological exploration in the recommended territories in the Vilyui syneclise was emphasized.