Depositional environments of Upper Paleozoic and Mesozoic deposits basing on sedimentological studies: Russian sector of the Barents Sea

UDK: 553.98 (26)
DOI: 10.24887/0028-2448-2020-4-10-16
Key words: The Barents Sea, depositional environments, wells, core, logs, sedimentological studies, ichnofacies, structure and texture, paleogeographic reconstructions
Authors: E.O. Malysheva (RN-Shelf-Arctic LLC, RF, Moscow), E.M. Volfovich (Rosneft Oil Company, RF, Moscow), S.A. Gorbunova (RN-Shelf-Arctic LLC, RF, Moscow), O.G. Nikiforova (RN-Shelf-Arctic LLC, RF, Moscow), V.A. Nikishin (RN-Shelf-Arctic LLC, RF, Moscow

The publication deals with the results of facies analisys and depositional environments reconstructions for the Permian - Jurassic sequences within the area of the eastern Barents Sea, including it’s southern part, the Pechora Sea and adjacent onshore areas of Rosneft Oil Company license areas. The research was based on revision, cutting or slabbing and sedimentological study of the core and logs interpretation from 21 wells. Compilation of biostratigraphic information and examination of ichnofossils, structures and textures of the rocks provided facies identification and environmental interpretation. Non-marine alluvial to coastal plain, marine near shore to relatively deep water facies has been identified. Cruziana и Skolithos ichnofacies, association of Macaronichnus and association typical for brackish-water have been recognized. Permian siliciclastic interval is strongly dominated by regressive deep water to shoreface and deltaic successions. In the Triassic tidal, brackish water and non-marine with alluvial facies were widely spread on the most part of the eastern Barents Sea while northward marine influence increased. Jurassic interval, best represented by the core, is characterized by the tidal to estuary deposits in the Lower Jurassic, shoreface to open marine – in the Middle Jurassic and relatively deep water marine – in the Upper Jurassic. Identified in core and logs facies are regarded as the basis for seismic facies interpretation and space prediction of hydrocarbon bearing plays of Rosneft Oil Company.

References

1. Ustritskiy V.I., Tugarova M.A., Barents sea – Permian and Triassic reference section, encountered by the well Admiralteyskaya-1 (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2013, V. 8, no. 2, URL: http://www.ngtp.ru/rub/2/18_2013.pdf

2. Boggs S. Jr., Principles of sedimentology and stratigraphy, Pearson Prentice Hall, 2006, 662 p.

3. Boyd R., Dalrimple R., Zaitlin B.A., Classification of clastic coastal depositional environments, Sedimentary Geology, 1992, V. 80 (3–4), pp. 139–150.

4. Pemberton S.G., Spila M., Pulham A.J., Saunders T., MacEachern J.A., Robbins D., Sinclair I.K., Ichnology and sedimentology of shallow to marginal marine systems: Ben Nevis & Avalon Reservoirs, Jeanne d'Arc Basin, Geological Association of Canada Short Course Notes, 2001, V. 15, 343 p.

5. Reineck H.-E., Singh I.B., Depositional sedimentary environments: With reference to terrigenous clastics, Springer Science & Business Media, 2012, 439 p.

The publication deals with the results of facies analisys and depositional environments reconstructions for the Permian - Jurassic sequences within the area of the eastern Barents Sea, including it’s southern part, the Pechora Sea and adjacent onshore areas of Rosneft Oil Company license areas. The research was based on revision, cutting or slabbing and sedimentological study of the core and logs interpretation from 21 wells. Compilation of biostratigraphic information and examination of ichnofossils, structures and textures of the rocks provided facies identification and environmental interpretation. Non-marine alluvial to coastal plain, marine near shore to relatively deep water facies has been identified. Cruziana и Skolithos ichnofacies, association of Macaronichnus and association typical for brackish-water have been recognized. Permian siliciclastic interval is strongly dominated by regressive deep water to shoreface and deltaic successions. In the Triassic tidal, brackish water and non-marine with alluvial facies were widely spread on the most part of the eastern Barents Sea while northward marine influence increased. Jurassic interval, best represented by the core, is characterized by the tidal to estuary deposits in the Lower Jurassic, shoreface to open marine – in the Middle Jurassic and relatively deep water marine – in the Upper Jurassic. Identified in core and logs facies are regarded as the basis for seismic facies interpretation and space prediction of hydrocarbon bearing plays of Rosneft Oil Company.

References

1. Ustritskiy V.I., Tugarova M.A., Barents sea – Permian and Triassic reference section, encountered by the well Admiralteyskaya-1 (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2013, V. 8, no. 2, URL: http://www.ngtp.ru/rub/2/18_2013.pdf

2. Boggs S. Jr., Principles of sedimentology and stratigraphy, Pearson Prentice Hall, 2006, 662 p.

3. Boyd R., Dalrimple R., Zaitlin B.A., Classification of clastic coastal depositional environments, Sedimentary Geology, 1992, V. 80 (3–4), pp. 139–150.

4. Pemberton S.G., Spila M., Pulham A.J., Saunders T., MacEachern J.A., Robbins D., Sinclair I.K., Ichnology and sedimentology of shallow to marginal marine systems: Ben Nevis & Avalon Reservoirs, Jeanne d'Arc Basin, Geological Association of Canada Short Course Notes, 2001, V. 15, 343 p.

5. Reineck H.-E., Singh I.B., Depositional sedimentary environments: With reference to terrigenous clastics, Springer Science & Business Media, 2012, 439 p.


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