Features of the Composition and Properties of Oils from Vendian-Lower Cambrian and Riphean Deposits in the Central Part of the Siberian Platform
A. R. AKHMEDOVA1, O. V. SEREBRENNIKOVA2, O. V. SHIGANOVA1
1Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia
2Institute of Petroleum Chemistry, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia
Keywords: Siberian platform, Eastern Siberia, crude oil, hydrocarbons, steranes, hopanes, aromatic hydrocarbons
Pages: 381-390
Abstract
The oils of the Central part of the Siberian platform are very diverse in their physicochemical properties. The studied oils were divided into four groups relying on the data on the group composition of hydrocarbons and the content of resin-asphaltene substances. Physicochemical properties of oils were determined in each group. The features of the individual composition of saturated hydrocarbons ( n -alkanes, isoprenoids, 12- and 13-monomethylalkanes, cyclopentanes, cyclohexanes, terpanes, and steranes) and aromatic hydrocarbons (alkylbenzenes, naphthalenes, fluorenes, biphenyls, phenanthrenes) were determined by means of gas-liquid chromatography and gas chromatography/mass spectrometry. The regularities of changes in the composition and physicochemical properties during the transition from group I oils characterized by rather low content of resinous and asphaltene components to the high-resinous oils of the IV group were determined. These changes are mainly related to the differences in the conditions under which the oil source rocks were accumulated and to the extent of their thermal maturity.
DOI: 10.15372/CSD2021316
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