Approaches to 3D Seismic Data Interpretation in the Study of the Pre-Jurassic Complex of Western Siberia (Frolovskaya Megadepression)

The pre-Jurassic complex (PJC) of the Frolovskaya mega-depression in Western Siberia is a promising direction for expanding the resource base: 68 fields are currently on the state balance, holding geological reserves of approximately 965 million tonnes of oil equivalent. This paper summarizes experience in interpreting wide-azimuth 3D seismic data to study the structure and petroleum potential of the complex over an area characterized by 10 surveys (covering more than 2800 km²), 90 exploration wells, and over 500 production wells. It is shown that a reliable structural model of the PJC is achieved through full-azimuth anisotropic depth migration, which improves the focusing of dipping reflections and the suppression of multiples under conditions of erosional relief and a weathering crust. For areas of acid volcanic rocks development of Late Permian–Early Triassic age, a relationship has been established between lithological composition (tuffs, rhyolites, metarhyolites) and elastic properties: the most promising reservoirs are porous tuffs with reduced acoustic impedance, traceable from simultaneous seismic inversion data; reservoirs with a complex pore-space type are not reliably distinguished by elastic properties. Beyond the volcanic areas, a probabilistic forecast of the compositional makeup of the PJC’s near-top section is proposed, using Gaussian discriminant analysis applied to P-impedance and Vp/Vs maps, based on a core elasticproperty database (more than 360 samples, 10 petroclasses). The integration of seismic exploration, petrophysics, and probabilistic modeling reduces drilling geological risks and improves the efficiency of exploration operations.

1. Alexeev A.D., Nemova V.D., Sapogova E E., Rostovtseva Yu.V. (2025). Study of natural reservoirs of the volcanogenic-sedimentary pre-Jurassic complex of the West Siberian petroleum-bearing basin. Russian Journal of Earth Sciences, 25, ES4014. (In Russ.) DOI: 10.2205/2025es001043

2. Akhiarova, E.R. (2023). Methodology for dynamic analysis of seismic data to study the structure of the pre-Jurassic complex of the Nyurolian structural-facies zone of Western Siberia. Cand. geol. and mineral. sci. diss. (In Russ.)

3. Boyarkin R. Yu., Kerusov I.N., Khisamutdinova A.I. (2024). Construction of volumetric fields of diffracted waves in the region of reflection angles tuned to the interval of the pre-Jurassic complex of Western Siberia. Geofizika, 6, pp. 2–10. (In Russ.) DOI 10.34926/geo.2024.44.31.001

4. Gubin I.A., Kanakova K.I. (2013). Seismo-geological model and prediction of oil and gas potential of Paleozoic deposits in the southern part of the Goreloyarsky dome-shaped meso-high (Verkhnekombar area, Tomsk region). Oil and Gas Geology, 5, pp. 56–64. (In Russ.)

5. Geology and oil and gas potential of the Khanty-Mansi Autonomous Okrug: atlas (2004). Khanty-Mansiysk: IzdatNaukaServis, 148 p. (In Russ.)

6. Grinevsky A.S., Khisamutdinova A.I., Boyarkin R.Yu., Kerusov I.N., Miroshnichenko D.E., Alekseeva P.A., Kucheryavenko D.S. (2021). Opportunities of wide-azimuth seismic exploration for studying the prospects of the Middle Jurassic and pre-Jurassic complexes of the West Siberian petroleum province. Geology, Geophysics and Development of Oil and Gas Fields, 5(353), pp. 30–39. (In Russ.) DOI 10.33285/2413-5011-2021-5(353)-30-39

7. Davletova L.I., Boyarkin R.Yu., Mikerov G.A., Kerusov I.N., Khisamutdinova A.I., Miroshnichenko D.E. (2020). Study of tectonic faults in the pre-Jurassic complex of Western Siberia using the diffraction imaging method. Expozitsiya Neft Gas, 2, pp. 16–19. (In Russ.)

8. Decision of the 6th Interdepartmental Stratigraphic Meeting on consideration and adoption of refined stratigraphic schemes of Mesozoic deposits of Western Siberia (2004). Ed. F.G. Gurari, N.K. Mogucheva, B.N. Shurygin et al. Novosibirsk: SNIIGGiMS, 114 p. (In Russ.)

9. Dobryden S. V., Efimov V. A., Kondakov A. P., Turenko S. K. (2024). Petrophysics of the volcanogenic-sedimentary sequence of the Krasnoleninsky arch: monograph. Tyumen: TIU, 162 p. (In Russ.)

10. Kerusov I.N., Boyarkin R.Yu., Khisamutdinova A.I. (2023). Interpretation of seismic diffracted waves for the study of the pre-Jurassic complex in a sector of the Frolovskaya mega-depression. GeoEurasia-2023. Geological Exploration Technologies: Science and Business: Proceedings of the VI International Geological and Geophysical Conference. Tver, Vol. II (III), pp. 131–134. (In Russ.)

11. Kontorovich V.A., Kontorovich A.E., Ayunova D.V., Ibragimova S.M., Burshtein L.M., Kalinin A.Yu., Kalinina L.M., Kanakova K.I., Kostyreva E.A., Solovyev M.V., Filippov Yu.F. (2024). Geological structure and oil and gas potential of Paleozoic deposits in the southeastern regions of Western Siberia. Russian Geology and Geophysics, 65(1), pp. 72–100. (In Russ.) DOI 10.15372/GiG2023181

12. Korovina T.A., Kropotova E.P., Minchenkov N.N. et al. (2009). PreJurassic basement (PSSE) in Western Siberia – an object of new concepts on the nature of oil and gas potential (from research experience and practical development of Rogozhnikov LU). Ways to realize the oil and gas and mineral potential of KhMAO – Yugra. Twelfth scientific-practical conference. KhantyMansiysk, Vol. 1, pp. 214–218. (In Russ.)

13. Krasnoschekova L.A., Vologdina I., Garcia Balza A.S. (2024). Weathering crust of the pre-Jurassic complex of the Kalinovo hydrocarbon field in the Tomsk region: composition and structure features. Proceedings of Tomsk Polytechnic University. Engineering of GeoResources, 335(6), pp. 160–174. (In Russ.) DOI: 10.18799/24131830/2024/6/4699

14. Kuryshcheva N.K. (2005). Forecasting and mapping of oil and gas accumulations in the upper part of the pre-Jurassic complex based on seismogeological data in the Shaime petroleum-bearing district and adjacent areas. Cand. geol. and mineral. sci. diss. Tyumen. (In Russ.)

15. Lebedev M.V., Sokolovskaya O.A., Yanevits R.B. (2014). Methodology and results of reservoir prediction in the weathering crust of the SeveroVaryeganskoye field. Geology, Geophysics and Development of Oil and Gas Fields, 3, pp. 4–12. (In Russ.)

16. Kharakhinov V.V. (2019). Oil and gas geodynamics of the West Siberian sedimentary megabasin. Oil and Gas Geology, 2, pp. 5–21. (In Russ.) DOI: 10.31087/0016-7894-2019-2-5-21

17. Khisamutdinova A.I., Alekseeva P.A., Romanchuk A.F., Miroshnichenko D.E., Kerusov I.N., Bakulin A.A., Kucheryavenko D.S., Kiryanova T.N. (2021). Structure and reservoir prediction of the pre-Jurassic complex in one of the areas of the Elizarovsky depression of the Frolov megabasin based on 3D seismic data in the absence of well information. Oil and Gas Geology. Theory and Practice, 6(4). (In Russ.) http://www.ngtp.ru/rub/2021/38_2021.html

18. Khisamutdinova A.I., Grinevsky A.S., Romanchuk A.F., Miroshnichenko D.E., Kaskov N.R., Shorokhova A.P., Bakulin A.A. (2024). Structure and prospects of the pre-Jurassic complex of the northern part of the Frolov megabasin (Elizarovsky depression) based on 3D seismic data. Conference proceedings “Geosciences: modern challenges and solutions”, St. Petersburg, pp. 301–305. (In Russ.)

19. Khromova I.Yu., Kunin K.N., Kashcheev D.E., Khromove E.V, Bakulin A.A. (2015). Creation of a productivity model of pre-Jurassic complex deposits at one of the fields in Western Siberia. Russian SPE Technical Conference. Moscow: SPE. (In Russ.)

20. Latyshev A., Panchenko I., Smirnova M., Kulikov P., Trushkova Y., Sapogova E., & Bakulin A. (2025). The Permian-Triassic volcanic activity in the West Siberian basin: A buried silicic LIP coeval to the Siberian Traps. Gondwana Research, 141, pp. 246–264. https://doi.org/10.1016/j.gr.2025.02.019

21. Medvedeva T.Yu., Tsymbalyuk Yu.A. (2016). Creation of geological and geophysical models of the Jurassic basement of Western Siberia for identifying new oil and gas prospective areas based on innovative technologies for processing and interpretation of geological and geophysical data. Geological report under State Contract. Tyumen: ZapSibNIIG. (In Russ.)

22. Rostovtseva Yu.V., Nemova V.D., Nemchenko N.V., Tomasenko S.V., Pustylnikova V.V. (2025). Petrogenetic typification of acidic volcanics of the roof of the oil-bearing pre-Jurassic complex of a field in the Elizarovsky depression of the West Siberian Plate. Russian Journal of Earth Sciences, 25, ES4013. (In Russ.) DOI: 10.2205/2025es001042

23. Shadrina S.V. (2009). On the question of the geodynamic setting of magmatite formation in the Rogozhnikov LU based on new geochemical data. Ways to realize the oil and gas and mineral potential of HMAO – Yugra. XII scientific-practical conference. Khanty-Mansiysk, pp. 219–223. (In Russ.)

24. Shadrina S.V., Kritskiy I.L. (2012). Reservoir formation in volcanogenic rocks under the influence of hydrothermal solutions. Oil Industry, 8, pp. 18–21. (In Russ.)

25. Shadrina S.V. (2018). Composition, structure, age of rocks of the preJurassic basement of the northeastern margin of the Krasnoleninsky arch. Oil and Gas Geology, 4, pp. 27–33. (In Russ.)

26. Shmakov V.D., Kaskov N.R., Bakulin A.A., Shorokhova A.P. (2023). Geological structure and reservoir productivity of Pre-Jurassic basement rocks of the Sredne-Nazymskoye oil field (Western Siberia): new data. Georesursy = Georesources, 25(3), pp. 111–118. (In Russ.) https://doi.org/10.18599/grs.2023.3.14

27. Smirnova M.E., Panchenko I.V., Kulikov P.Y., Latyshev A.V., Tokmakova A.I., Trushkova Yu. I., Sapogova E.E., Bakulin A.A., Shmakov V.D. (2024). Structure, petrotypes and reservoir properties of altered Permian-Triassic rhyodacites in the grabens of the Frolov megabasin of Western Siberia. Litologiâ i poleznye iskopaemye, 2, pp. 245–276. (In Russ.) DOI: 10.31857/ S0024497X24020065

28. Stoupakova A.V., Sokolov A.V., Soboleva E.V., Kiryukhina T.A., Kurasov I.A., Bordyug E.V. (2015). Geological survey and petroleum potential of Paleozoic deposits in the Western Siberia. Georesursy = Georesources, 2(61), pp. 63–76. http://dx.doi.org/10.18599/grs.61.2.6