Experimental Data on Organic Matter Maturation in a Sample of Bazhenov Shale Formation (Western Siberia)

This paper presents the results of an isothermal kinetic experiment by closed-system hydrous pyrolysis using an oil source rock sample from the Bazhenov shale formation. After 48 hours of thermal exposure at a temperature of 350degree celsius, 80% of the kerogen generation potential with respect to the initial sample was transformed into hydrocarbons. Changes in organic matter during laboratory modeling of maturation controlled by pyrolytic parameters, follow the same trends as changes in natural source rocks at different katagenesis stages. The kinetic spectra of kerogen activation energy destruction show a certain heterogeneity of organic matter inside the rock. A decrease in low-energy bonds and an increase in the maximum release of hydrocarbon compounds from 53 to 54 kcal/mol were observed at a constant frequency factor. The calculated changes in the generation of hydrocarbon compounds at different activation energies depending on the maturity level show differences from the experimental results, which indicates the influence of the maceral composition and the necessity to take the variability of individual components into account in basin modeling.