Distribution and Composition of Nitrogen-Containing Compounds in Petroleum from the Lower and Middle Jurassic Deposits in West Siberia

The distribution and composition of low-molecular nitrogen-containing components in petroleum from the Lower and Middle Jurassic complex of West Siberia were investigated. The dependence of the quantitative content and qualitative composition of hetero-organic compounds of nitrogen on the geological-geochemical bedding conditions was revealed. It was established that the group and individual composition of nitrogencontaining compounds of the Lower and Middle Jurassic petroleum is typical also for petroleum from the Cretaceous and Upper Jurassic deposits of the West Siberian oil-and-gas province. No evident differences in the distribution of predominant types of low-molecular nitrogen-containing compounds were revealed in the investigated kinds of petroleum.