About “Paleozoic roots” of the oils of the eastern Ciscaucasia
https://doi.org/10.18599/grs.2022.2.17
Abstract
The paper considers geochemical data on the biomarker composition of oils from the fields of the TerekCaspian oil and gas basin. Samples of oils from the fields of the main oil and gas bearing regions of the Eastern Ciscaucasia – Terek-Sunzha zone, Prikumsky swell, Piedmont Dagestan and the Middle Caspian Sea were studied. To determine the “geochemical” age of oils, the ratios of regular steranes in saturated oil fractions were analyzed. It was found that the value of the biomarker parameter St28/St29, which determines the geological age of the original organic matter for oils, varies widely – 0.36–1.47. The most “ancient” age (Devonian-Carboniferous) was determined for the oils of the Prikumsky swell and the water area of the Middle Caspian; in the Terek-Sunzha zone and Piedmont Dagestan, an increase in the proportion of St28 sterane is recorded in oils, which indicates a younger generation age (up to the Paleogene). The data obtained can be used to clarify the history of the formation of hydrocarbon accumulations in this region.
About the Authors
N. Sh. Yandarbiev
Lomonosov Moscow State University
Russian Federation
Russian Federation
Nurdin Sh. Yandarbiev – PhD (Geology and Mineralogy), Associate Professor, Petroleum Geology Department
60/2, Leninsky ave., Moscow, 119234
R. F. Sachsenhofer
Montanuniversitaet Leoben
Austria
Austria
Reinhard F. Sachsenhofer – Professor, Head of Petroleum Geology
5, Peter-Tunner st., Leoben, 8700
A. N. Stepanov
Gubkin Scientific and Technical Society of Oil and Gas Workers in Volgograd
Russian Federation
Russian Federation
Andrey N. Stepanov – PhD (Geology and Mineralogy), Chairman of the Board
of 220, 6, Kanunnikov st., Volgograd, 400001
D. N. Yandarbieva
Lomonosov Moscow State University
Russian Federation
Russian Federation
Diana N. Yandarbieva – Graduate student, Petroleum Geology Department
60/2, Leninsky ave., Moscow, 119234
References
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Review
For citations:
Yandarbiev N.Sh., Sachsenhofer R.F., Stepanov A.N., Yandarbieva D.N. About “Paleozoic roots” of the oils of the eastern Ciscaucasia. Georesursy = Georesources. 2022;24(2):186-191. (In Russ.) https://doi.org/10.18599/grs.2022.2.17
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