This work studies the geochemical features of the composition of kerogens from Jurassic deposits in the north of Western Siberia. The patterns of changes in the pyrolytic and isotopic characteristics of organic matter were established, information was obtained on its genetic type, maturity and residual oil and gas generation potential of organic matter. In the Jurassic deposits, the main oil-producing complexes were identified (Bazhenov horizon), as well as horizons capable of producing predominantly gaseous hydrocarbons due to their high maturity (Malyshevsky, Leontievsky, to a lesser extent Levinsky, Kiterbyutsky).
