Off-line-pyrolysis of kerogen from domanik deposits of the Timan-Pechora basin

We have studied the composition of aliphatic and aromatic fractions of kerogen pyrolysis products from Timan-Pechora basin domanik rocks characterized by different levels of thermal maturity of its organic matter. We determined regularities of changing pyrolysate composition with the growth of OM catagenesis, which were confined in the reduction of concentrations of n-alkanes and n-alkenes-1, n-alkylnaphthalenes and n-alkylbenzenes. By the middle of the main phase of oil formation the sulphur structures completely disappear from the kerogen matrix. In the most mature specimens of domanik kerogen the content of aliphatic hydrocarbons is comparable to their content in immature kerogen of Upper Jurassic shales from the East European platform, reflecting a good residual hydrocarbon potential of organic matter of catagenetically altered domanik deposits.