Experimental data on organic matter maturation investigation in one sample of the Bazhenov shale formations (Western Siberia)

Abstract

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