The Pechora Sea shelf – clusters of hydrocarbon potential of Timan-Pechora province

UDK: 553.98
DOI: 10.24887/0028-2448-2021-1-12-17
Key words: Pechora Sea, 3D seismic, seismic facies, sedimentation, diagenesis, Lower Devonian, reservoir rocks, isolated reefs, hydrocarbon resources, geochemical prospecting, gravity and magnetic survey
Authors: О.А. Zakharova (Gazpromneft NTC LLC, RF, Saint-Petersburg), D.Е. Zagranovaskaya (Gazpromneft NTC LLC, RF, Saint-Petersburg), А.P. Vilesov (Gazpromneft NTC LLC, RF, Saint-Petersburg), S.N. Rasskazova (Gazpromneft NTC LLC, RF, Saint-Petersburg), V.S. Stepanova (Gazpromneft NTC LLC, RF, Saint-Petersburg)

The article is devoted to the results of hydrocarbon prospects estimating on the Pechora sea shelf within the Gazprom Neft license areas. The area was clustered according to its geological and geophysical features. More than a hundred prospective objects are defined in six oil and gas complexes. Overall estimated hydrocarbon potential is more than 2,525 billion tons. The assessment is based on integration of regional 2D seismic data, new 3D seismic data from the three license areas, as well as core and outcrops data from adjacent areas. Based on sequence stratigraphic analysis, the reservoir properties and other parameters of the prospective objects were clarified. The promising objects are rated on the basis of key geological and geophysical indicators. Moreover the location for appraisal drilling for subsequent exploration is proposed. In addition to determining oil and gas content of Triassic, Permian and Carboniferous reservoirs, it is spoken in details about prospects of deep complexes. These complexes are reef traps of the Upper Franian, terrigenous reservoirs of the Middle Devonian and Prague stage, hypergene carbonate reservoirs of the Ovinparmian horizon (Lower Devonian) and Ordovician-Silurian carbonate rocks. Aiming to discovering giant fields on the Arctic shelf one of the technological challenges has been identified – drilling in difficult climatic conditions to prospective horizons at depths of more than 4.5-5.5 km. The proposed exploration and R&D program allows to determine the optimal well location and to solve non-standard technological challenges to achieve this ambitious goal.

References

1. Prishchepa O.M., Nefedov Yu.V., Ayrapetyan M.G., Hydrocarbon potential of the Arctic shelf sector of the north Timan-Pechora petroleum province on the results of regional researches (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2020, V. 15, no. 1, URL: http://www.ngtp.ru/rub/2020/4_2020.html

2. Bazhenova T.K., Petroleum source formations of the Russian ancient platforms and their petroleum potential (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2016, V. 11, no. 4, URL: http://www.ngtp.ru/rub/1/45_2016.pdf

3. Yur'eva Z.P., Position of oil pools in the sections of the Lower Devonian deposits (the Timan-Pechora province) (In Russ.), Geologiya nefti i gaza, 2015, no. 3, pp. 3–13. 

4. Zhemchugova V.A., Maslova E.E., Naumchev Yu.V., Sedimentatsionnaya model' nizhnedevonskikh otlozheniy severo-vostoka Khoreyverskoy vpadiny (Sedimentation model of the Lower Devonian deposits of the northeast of the Khoreyver depression), Collected papers “Geologiya i mineral'nye resursy Evropeyskogo Severo-Vostoka Rossii” (Geology and mineral resources of the European North-East of Russia), Proceedings of XVII Geological Congress of the Komi Republic, Part 3, Syktyvkar: Geoprint Publ., 2019, pp. 43–45.

5. Dushin A.S., Rykus M.V., Naumov G.V., Gaymaletdinova G.F., Depositional environments, diagenetic processes and their impact on reservoir properties of Upper Silurian-Lower Devonian carbonates in R. Trebs and A. Titov fields potential (In Russ.), Neftegazovoe delo, 2015, no. 5, pp. 20–44.

6. Vilesov A.P., Zakharova O.A., Zagranovskaya D.E. et al., The geological history and resource potential of Ovinparmian carbonate reservoirs of Dolginsko-Papaninskaya structural zone (Timan-Pechora Plate) (In Russ.), ProNeft', 2020, no. 4, pp. 24-33. 

7. Vashkevich A.A., Strizhnev K.V., Chekmarev S.I. et al., Experience of integration of potential field methods and surface geochemistry in the context of exploration planning within underexplored areas of the Bazhenov formation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 12, pp. 32–35.

The article is devoted to the results of hydrocarbon prospects estimating on the Pechora sea shelf within the Gazprom Neft license areas. The area was clustered according to its geological and geophysical features. More than a hundred prospective objects are defined in six oil and gas complexes. Overall estimated hydrocarbon potential is more than 2,525 billion tons. The assessment is based on integration of regional 2D seismic data, new 3D seismic data from the three license areas, as well as core and outcrops data from adjacent areas. Based on sequence stratigraphic analysis, the reservoir properties and other parameters of the prospective objects were clarified. The promising objects are rated on the basis of key geological and geophysical indicators. Moreover the location for appraisal drilling for subsequent exploration is proposed. In addition to determining oil and gas content of Triassic, Permian and Carboniferous reservoirs, it is spoken in details about prospects of deep complexes. These complexes are reef traps of the Upper Franian, terrigenous reservoirs of the Middle Devonian and Prague stage, hypergene carbonate reservoirs of the Ovinparmian horizon (Lower Devonian) and Ordovician-Silurian carbonate rocks. Aiming to discovering giant fields on the Arctic shelf one of the technological challenges has been identified – drilling in difficult climatic conditions to prospective horizons at depths of more than 4.5-5.5 km. The proposed exploration and R&D program allows to determine the optimal well location and to solve non-standard technological challenges to achieve this ambitious goal.

References

1. Prishchepa O.M., Nefedov Yu.V., Ayrapetyan M.G., Hydrocarbon potential of the Arctic shelf sector of the north Timan-Pechora petroleum province on the results of regional researches (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2020, V. 15, no. 1, URL: http://www.ngtp.ru/rub/2020/4_2020.html

2. Bazhenova T.K., Petroleum source formations of the Russian ancient platforms and their petroleum potential (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2016, V. 11, no. 4, URL: http://www.ngtp.ru/rub/1/45_2016.pdf

3. Yur'eva Z.P., Position of oil pools in the sections of the Lower Devonian deposits (the Timan-Pechora province) (In Russ.), Geologiya nefti i gaza, 2015, no. 3, pp. 3–13. 

4. Zhemchugova V.A., Maslova E.E., Naumchev Yu.V., Sedimentatsionnaya model' nizhnedevonskikh otlozheniy severo-vostoka Khoreyverskoy vpadiny (Sedimentation model of the Lower Devonian deposits of the northeast of the Khoreyver depression), Collected papers “Geologiya i mineral'nye resursy Evropeyskogo Severo-Vostoka Rossii” (Geology and mineral resources of the European North-East of Russia), Proceedings of XVII Geological Congress of the Komi Republic, Part 3, Syktyvkar: Geoprint Publ., 2019, pp. 43–45.

5. Dushin A.S., Rykus M.V., Naumov G.V., Gaymaletdinova G.F., Depositional environments, diagenetic processes and their impact on reservoir properties of Upper Silurian-Lower Devonian carbonates in R. Trebs and A. Titov fields potential (In Russ.), Neftegazovoe delo, 2015, no. 5, pp. 20–44.

6. Vilesov A.P., Zakharova O.A., Zagranovskaya D.E. et al., The geological history and resource potential of Ovinparmian carbonate reservoirs of Dolginsko-Papaninskaya structural zone (Timan-Pechora Plate) (In Russ.), ProNeft', 2020, no. 4, pp. 24-33. 

7. Vashkevich A.A., Strizhnev K.V., Chekmarev S.I. et al., Experience of integration of potential field methods and surface geochemistry in the context of exploration planning within underexplored areas of the Bazhenov formation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 12, pp. 32–35.


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. .