Логин:
Пароль:
Регистрация
Забыли свой пароль?

Mesozoic-Cenozoic deposits of the East Siberian and the Chukchi Seas and the prospects of their oil and gas potential based on sequence stratigraphic analysis

UDK: 553.98
DOI: 10.24887/0028-2448-2020-4-17-23
Key words: stratigraphy, sequence, system tracts, sea-level change, petroleum systems
Authors: V.N. Stavitskaya (Arctic Research Center LLC, RF, Moscow), O.S. Makhova (Arctic Research Center LLC, RF, Moscow), A.B. Popova (Arctic Research Center LLC, RF, Moscow), N.A. Malyshev (Rosneft Oil Company, RF, Moscow), V.E. Verzhbitskiy (Rosneft Oil Company, RF, Moscow), I.V. Mazaeva (RN-Exploration LLC, RF, Moscow), M.V. Skaryatin (RN-Exploration LLC, RF, Moscow), E.A. Bulgakova (RN-Exploration LLC, RF, Moscow), S.A. Zaytseva (RN-Exploration LLC, RF, Moscow)

Today the Eastern Russian Arctic is the least studied region of the world. Anyway there are some sedimentary basins with thick deposits and probable high oil and gas potential. Sedimentary basins mostly filled with Aptian-Cenozoic sediments. In some areas the presence of an older Paleozoic cover is assumed. Terrigenous clinoform complexes of Cretaceous and Cenozoic age are the main target of this study. The sequence stratigraphic analysis is the most suitable method for detailed understanding of the internal geological structure of clinoform complexes today. This analysis was based on reference seismic profiles located in the Northern part of the East Siberian and Chukchi seas. The interpretation was carried out with the use geological and geophysical data for wells of the US sector of the Chukchi sea, Aion-1, ACEX, as well as using the results of the outcrops studies of the continental margins of the Eastern Arctic seas and the islands. Detailed study let to identify sequence boundaries, transgressive and maximum flooding surfaces and system tracts. Using the results of interpretation of reference seismic profiles, Wheeler (chronostratigraphic) diagrams were constructed and synchronous regional events, transgressions and regressions, were identified. Transgressive and regressive cycles in deposits were established. The Cretaceous clinoform complex has a predominantly regressive structure, and the Cenozoic clinoform complex includes two transgressive and regressive cycles. Regressive and transgressive trends allowed to clarify the stratigraphic position of sections. Four major transgressive and regressive cycles divided by regional boundaries were established for the entire sedimentary section. The lower boundary corresponds to a global flooding in Thanetian age (the Paleocene). The coastline moved inside mainland for hundreds kilometers. The second boundary is also consistent with a global flood, set in Lutetian time (middle Eocene), and then the trend became a regressive one. The next regional boundary corresponds to the erosional stage in Barton time (middle Eocene) and marks the end of regression and the beginning of transgression. The upper boundary corresponds to the stage of flooding, established in the Priabonian time (late Eocene). Later the trend of sedimentation became regressive up to the present time. As a result, a comprehensive analysis allowed Rosneft Oil Company to clarify the age and conditions of formation of Mesozoic and Cenozoic sediments, as well as the forecast of the presence and distribution of elements of hydrocarbon systems (detecting the intervals of regional reservoirs, source rocks, seals).

References

1. Malyshev N.A., Obmetko V.V., Borodulin A.A., Hydrocarbon potential of the Eastern Arctic sedimentary basins (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2010, no. 1, pp. 20–28.

2. Popova A.B., Makhova O.S., Malyshev N.A. et al., Construction of an integrated seismic-geological model of the East Siberian Sea shelf (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 4, pp. 30–34.

3. Hubbard R.J., Edrich S.P., Rattey R.P., Geologic evolution and hydrocarbon habitat of the “Arctic Alaska Microplate”, Marine and Petroleum Geology, 1987, V. 4 (1), pp. 2–34. 

4. Van Wagoner J.C. et al., An overview of the fundamentals of sequence stratigraphy and key definitions, Society of Economic Paleontologists and Mineralogists, 1988, V. 42.

5. Posamentier H.W.,  Allen G.P.,  Siliciclastic sequence stratigraphy – Concepts and applications, SEPM Concepts in Sedimentology and Paleontology, 1999, V. 7.

6. Haq B.U., Hardenbol J, Vail P.R., Chronology of fluctuating sea levels since the Triassic, Science, 1987, V. 235, pp. 1156–1167, DOI:10.1126/science.235.4793.1156.

7. Golionko B.G., Vatrushkina E.V., Verzhbitskiy V.E. et al., Deformations and Structural Evolution of Mesozoic Complexes in Western Chukotka (In Russ.), Geotektonika = Geotectonics, 2018, no. 1, pp. 63–78.

8. Sokolov S.D., Tuchkova M.I., Ganelin A.V., Bondarenko G.E., Layer P., Tectonics of the South Anyui Suture, Northeastern Asia (In Russ.), Geotektonika = Geotectonics, 2015, no. 1, pp. 5–30.

9. Verzhbitsky V.E., Sokolov S.D., Frantzen E.M. et al., The South Chukchi sedimentary Basin (Chukchi Sea, Russian Arctic): Age, structural pattern, and hydrocarbon potential, Tectonics and sedimentation: Implications for petroleum systems: AAPG Memoir 100, 2012, pp. 267–290.

10. Aleksandrova G.N., Geological evolution of Chauna depression (North-Eastern Russia) during Paleogene AND Neogene (In Russ.), Byulleten' Moskovskogo obshchestva ispytateley prirody. Otdel geologii, 2016, V. 91, no. 6, pp. 148–164.

11. Backman J., Moran K., McInroy D.B., Mayer L.A., Expedition 302 Scientists, Sites M0001–M0004, Proceedings of the Integrated Ocean Drilling Program, 2006, V. 302, DOI: 10.2204/iodp.proc.302.104.2006

12. Slobodin V.Ya., Kim B.I., Stepanova G.V., Kovalenko F.Ya., Raschlenenie razreza ayonskoy skvazhiny po novym biostratigraficheskim dannym (The sectional layering of the Aion well with new biostratigraphic data), Collected papers “Stratigrafiya i paleontologiya mezo-kaynozoya Sovetskoy Arktiki” (Stratigraphy and paleontology of the Mesozoic-Cenozoic of the Soviet Arctic), Leningrad: Publ. of Sevmorgeologiya, 1990, pp. 43–58.

13. Stein R., Jokat W., Niessen F., Weigelt E., Exploring the long-term Cenozoic Arctic Ocean climate history: a challenge within the International Ocean Discovery Program (IODP), Arktos, Arktos 1, 3, 2015, DOI 10.1007/s41063-015-0012-x.

Today the Eastern Russian Arctic is the least studied region of the world. Anyway there are some sedimentary basins with thick deposits and probable high oil and gas potential. Sedimentary basins mostly filled with Aptian-Cenozoic sediments. In some areas the presence of an older Paleozoic cover is assumed. Terrigenous clinoform complexes of Cretaceous and Cenozoic age are the main target of this study. The sequence stratigraphic analysis is the most suitable method for detailed understanding of the internal geological structure of clinoform complexes today. This analysis was based on reference seismic profiles located in the Northern part of the East Siberian and Chukchi seas. The interpretation was carried out with the use geological and geophysical data for wells of the US sector of the Chukchi sea, Aion-1, ACEX, as well as using the results of the outcrops studies of the continental margins of the Eastern Arctic seas and the islands. Detailed study let to identify sequence boundaries, transgressive and maximum flooding surfaces and system tracts. Using the results of interpretation of reference seismic profiles, Wheeler (chronostratigraphic) diagrams were constructed and synchronous regional events, transgressions and regressions, were identified. Transgressive and regressive cycles in deposits were established. The Cretaceous clinoform complex has a predominantly regressive structure, and the Cenozoic clinoform complex includes two transgressive and regressive cycles. Regressive and transgressive trends allowed to clarify the stratigraphic position of sections. Four major transgressive and regressive cycles divided by regional boundaries were established for the entire sedimentary section. The lower boundary corresponds to a global flooding in Thanetian age (the Paleocene). The coastline moved inside mainland for hundreds kilometers. The second boundary is also consistent with a global flood, set in Lutetian time (middle Eocene), and then the trend became a regressive one. The next regional boundary corresponds to the erosional stage in Barton time (middle Eocene) and marks the end of regression and the beginning of transgression. The upper boundary corresponds to the stage of flooding, established in the Priabonian time (late Eocene). Later the trend of sedimentation became regressive up to the present time. As a result, a comprehensive analysis allowed Rosneft Oil Company to clarify the age and conditions of formation of Mesozoic and Cenozoic sediments, as well as the forecast of the presence and distribution of elements of hydrocarbon systems (detecting the intervals of regional reservoirs, source rocks, seals).

References

1. Malyshev N.A., Obmetko V.V., Borodulin A.A., Hydrocarbon potential of the Eastern Arctic sedimentary basins (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2010, no. 1, pp. 20–28.

2. Popova A.B., Makhova O.S., Malyshev N.A. et al., Construction of an integrated seismic-geological model of the East Siberian Sea shelf (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 4, pp. 30–34.

3. Hubbard R.J., Edrich S.P., Rattey R.P., Geologic evolution and hydrocarbon habitat of the “Arctic Alaska Microplate”, Marine and Petroleum Geology, 1987, V. 4 (1), pp. 2–34. 

4. Van Wagoner J.C. et al., An overview of the fundamentals of sequence stratigraphy and key definitions, Society of Economic Paleontologists and Mineralogists, 1988, V. 42.

5. Posamentier H.W.,  Allen G.P.,  Siliciclastic sequence stratigraphy – Concepts and applications, SEPM Concepts in Sedimentology and Paleontology, 1999, V. 7.

6. Haq B.U., Hardenbol J, Vail P.R., Chronology of fluctuating sea levels since the Triassic, Science, 1987, V. 235, pp. 1156–1167, DOI:10.1126/science.235.4793.1156.

7. Golionko B.G., Vatrushkina E.V., Verzhbitskiy V.E. et al., Deformations and Structural Evolution of Mesozoic Complexes in Western Chukotka (In Russ.), Geotektonika = Geotectonics, 2018, no. 1, pp. 63–78.

8. Sokolov S.D., Tuchkova M.I., Ganelin A.V., Bondarenko G.E., Layer P., Tectonics of the South Anyui Suture, Northeastern Asia (In Russ.), Geotektonika = Geotectonics, 2015, no. 1, pp. 5–30.

9. Verzhbitsky V.E., Sokolov S.D., Frantzen E.M. et al., The South Chukchi sedimentary Basin (Chukchi Sea, Russian Arctic): Age, structural pattern, and hydrocarbon potential, Tectonics and sedimentation: Implications for petroleum systems: AAPG Memoir 100, 2012, pp. 267–290.

10. Aleksandrova G.N., Geological evolution of Chauna depression (North-Eastern Russia) during Paleogene AND Neogene (In Russ.), Byulleten' Moskovskogo obshchestva ispytateley prirody. Otdel geologii, 2016, V. 91, no. 6, pp. 148–164.

11. Backman J., Moran K., McInroy D.B., Mayer L.A., Expedition 302 Scientists, Sites M0001–M0004, Proceedings of the Integrated Ocean Drilling Program, 2006, V. 302, DOI: 10.2204/iodp.proc.302.104.2006

12. Slobodin V.Ya., Kim B.I., Stepanova G.V., Kovalenko F.Ya., Raschlenenie razreza ayonskoy skvazhiny po novym biostratigraficheskim dannym (The sectional layering of the Aion well with new biostratigraphic data), Collected papers “Stratigrafiya i paleontologiya mezo-kaynozoya Sovetskoy Arktiki” (Stratigraphy and paleontology of the Mesozoic-Cenozoic of the Soviet Arctic), Leningrad: Publ. of Sevmorgeologiya, 1990, pp. 43–58.

13. Stein R., Jokat W., Niessen F., Weigelt E., Exploring the long-term Cenozoic Arctic Ocean climate history: a challenge within the International Ocean Discovery Program (IODP), Arktos, Arktos 1, 3, 2015, DOI 10.1007/s41063-015-0012-x.


Attention!
To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases

01.10.2020
24.09.2020
09.09.2020