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Journal V.23.No.2.2021
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Generation potential, distribution area and maturity of the Barents-Kara Sea source rocks

A.V. Stoupakova, M.A. Bolshakova, A.A. Suslova, A.V. Mordasova, K.O. Osipov, S.O. Kovalevskaya, T.O. Kolesnikova, G. Shevchenko, I. Masterkov, A.A. Tsigankova, A.A. Gilmullina

Original article

DOI https://doi.org/10.18599/grs.2021.2.1

6-25
rus.

open access

Under a Creative Commons license
Identification of the source rock potential and distribution area is the most important stage of the basin analysis and oil, and gas reserves assessment. Based on analysis of the large geochemical and geological data base of the Petroleum geology department of the Lomonosov Moscow State University and integration of different-scale information (pyrolysis results and regional palaeogeographic maps), generation potential, distribution area and maturity of the main source rock intervals of the Barents-Kara Sea shelf are reconstructed. These source rocks wide distribute on the Barents-Kara Sea shelf and are characterized by lateral variability of generation potential and type of organic matter depending on paleogeography. During regional transgressions in Late Devonian, Early Permian, Middle Triassic and Late Jurassic, deposited source rocks with marine organic matter and excellent generation potential. However in the regression periods, during the short-term transgressions, formed Lower Carboniferous, Upper Permian, Induan, Olenekian and Late Triassic source rocks with mixed and terrestrial organic matter and good potential.

Upper Devonian shales contain up to 20.6% (average – 3%) of marine organic matter, have an excellent potential and is predicted on the Eastern-Barents megabasin. Upper Devonian source rocks are in the oil window on the steps, platforms and monoclines, while are overmature in the basins. Lower Permian shale-carbonate source rock is enriched with marine organic matter (up to 4%, average – 1.4%) and has a good end excellent potential. Lower Permian source rocks distribute over the entire Barents shelf and also in the North-Kara basin (Akhmatov Fm). These rocks enter the gas window in the Barents Sea shelf, the oil window on the highs and platforms and are immature in the North-Kara basin. Middle Triassic shales contain up to 11.2% of organic matter, there is a significant lateral variability of the features: an excellent generation potential and marine organic matter on the western Barents Sea and poor potential and terrestrial organic matter in the eastern Barents Sea. Middle Triassic source rocks are in the oil window; in the depocenters it generates gas. Upper Jurassic black shales are enriched with marine and mixed organic matter (up to 27,9%, average – 7.3%) and have an excellent potential. On the most Barents-Kara Sea shelf, Upper Jurassic source rock are immature, but are in the oil window in the South-Kara basin and in the deepest parts of the Barents Sea shelf.
 

Barents-Kara Sea shelf, source rocks, organic matter, generation potential, maturity, paleogeorgraphy, basin analysis

 

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Antonina V. Stoupakova
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Maria A. Bolshakova
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Anna A. Suslova
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Alina V. Mordasova
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation
e-mail: a.mordasova@oilmsu.ru

Konstantin O. Osipov
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Svetlana O. Kovalevskaya
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Tatiana O. Kolesnikova
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Gleb A. Shevchenko
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Igor A. Masterkov
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Anastasia A. Tsygankova
Lomonosov Moscow State University
1, Leninskie gory, Moscow, 119234, Russian Federation

Albina A. Gilmullina
University of Bergen
41, Allégaten, Bergen, Norway

 

For citation:

Stoupakova A.V., Bolshakova M.A., Suslova A.A., Mordasova A.V., Osipov K.O., Kovalevskaya S.O., Kolesnikova T.O., Shevchenko G., Masterkov I., Tsigankova A.A., Gilmullina A.A. (2021). Generation potential, distribution area and maturity of the Barents-Kara Sea source rocks. Georesursy = Georesources, 23(2), pp. 6–25. DOI: https://doi.org/10.18599/grs.2021.2.1

 

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