THE THEORY OF NAPHTHIDOGENESIS: A QUANTITATIVE MODEL OF THE CATAGENETIC EVOLUTION OF AQUATIC ORGANIC MATTER
A.E. Kontorovich1,2, L.M. Burshtein1, V.R. Livshits1,3
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Tyumen State Oil and Gas University, Tyumen, Russia
3Novosibirsk State University, Novosibirsk, Russia
Keywords: Kerogen, Bazhenov Formation, hydrocarbon generation, carbon-rich sedimentary formations
Abstract
This study discusses the evolution of the composition of dispersed organic matter from the Bazhenov Formation (West Siberian petroleum basin) and the products of its catagenetic transformation on the basis of the balance and kinetic approaches to modeling of the catagenetic transformation of organic matter and its individual components, primarily kerogen. The results show that the variations in the elemental composition of kerogen and the extent of generation of both hydrocarbons and nonhydrocarbons can be quantitatively described using a simplified kinetic model. Preliminary estimates of the model parameters are given for the averaged Bazhenov-type kerogen. It is shown that numerical modeling of the catagenetic transformation of dispersed organic matter confirms the validity of the recognition of the main phase (zone) of oil generation and the main phase (zone) of gas generation.
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