Издатель: Издательский дом СВФУ , Место издания: Якутск , Год издания: 2023

The paper presents the results of a complex geochemical study on organic matter and the composition of bitumoids and their fractions of potentially oil source rocks of Permian deposits of the Predverkhoyansk and Leno-Anabar troughs. The data obtained on geochemistry showed that, according to the set of hydrocarbon-biomarkers, dispersed organic matter of Permian deposits of the marginal troughs corresponded to the initial organic matter of a mixed composition with a predominance of terrigenous components and was capable generating a large amount of liquid hydrocarbons along with gaseous ones. Based on the common genetic type of the initial organic matter of Permian deposits in the Lena-Anabar trough and the Vilyui syneclise as the similarity of the composition of bitumoids at the same catagenesis gradations, we can conclude the processes of oil and gas formation in these deposits to be the same direction. All of this allows us to approach the assessment of their oil and gas source potential from a common position. Thus, Permian deposits of the marginal troughs of the Vilyui syneclise can be considered as gas and oil source deposits, as well as the central part of the Lena-Vilyui sedimentary basin.