Hydrocarbon Systems and Assessment of The Probability of Discovery of Oil and Gas Accumulations in The Bering Sea

Summary To study the hydrocarbon systems, geochemical and lithological studies were carried out and modeling technologies were used using Schlumberger “PetroMod” software systems, small-scale modeling of sedimentary basins of this region and their hydrocarbon systems was carried out. As a result of research and modeling, a forecast of the distribution of potentially non-gas source strata of the Paleogene and Neogene was made. The prognosis of the OM maturity levels of the oil and gas source strata of the Anadyr oil and gas region, carried out in the process of modeling hydrocarbon systems, based on the results of studying the reservoir temperatures and the reflectivity of vitrinite in the wells of its mainland, showed that in the most curved sections (basins) of the sedimentary basin of the same name, all potential oil and gas source strata have reached sufficient maturity for the generation of hydrocarbons. At the same time, the degree of OM catagenesis in the Eocene-Oligocene oil and gas source strata generally does not exceed the stages of predominant generation of liquid hydrocarbons. At the same time, the potential oil and gas source strata of the Miocene reached the level of the oil window in relatively small areas of the oil and gas bearing region. In general, the most bowed sections (hollows) of the Anadyr sedimentary basin, in which mature oil and gas source deposits are located, can be considered as potential sources of hydrocarbon generation.