One of key exploration and prospecting trends in the current stage of West Siberian Petroleum Province studies is investigations of its flanks. Western flank zone of the West Siberian megabasin is characterised by geological factors favourable for large hydrocarbon accumulations discovery. Level of geological and geophysical knowledge, features of the Jurassic interval formation, tectonic framework, and evolution of the considered basin throughout geological time are indicative of its great promise. Oil and gas deposits have already been discovered in the area and its periphery; some of them are classified large. The Talinasky field is discovered in the south, and the Yarudeisky — in the north. The deposits belong to different types, they are: combination — in Lower Jurassic sequences; and structural and lithologically screened — in Middle Jurassic. Similar deposits are expected to be found in the Lower-Middle Jurassic series of the study area. Discovery of accumulations is expected in the basal Upper Jurassic horizons, which are composed of Vogulkinsky and Trekhozerny deposits having marine genesis. Further studies of the western part of the West Siberian megabasin are essential for oil and gas exploration and prospecting.

Sergei L. Belousov ORCiD 
Expert
Tyumen Petroleum Research Center,
79/1, ul. Osipenko, Tyumen, 625000, Russia
e-mail: SLBelousov@tnnc.rosneft.ru

​Sergei V. Permyakov  ORCiD 
Chief Specialist
Tyumen Petroleum Research Center,
79/1, ul. Osipenko, Tyumen, 625000, Russia
e-mail: svpermyakov2@tnnc.rosneft.ru

Anastasiya A. Sokol’nikova ORCiD
Head of Department
Tyumen Petroleum Research Center,
79/1, ul. Osipenko, Tyumen, 625000, Russia
e-mail: aasokolnikova@tnnc.rosneft.ru

1. Lider M.R. Sedimentologiya. Protsessy i produkty [Sedimentology. Processes and products]. Moscow: Mir; 1986. 439 p. In Russ.
2. Alekseev V.P. Atlas fatsii yurskikh terrigennykh otlozhenii (uglenosnye tolshchi Severnoi Evrazii). Ekaterinburg: UGGU; 2007. 209 p. In Russ.
3. Sedimentary Environments: Processes, Facies and Stratigraphy. 3rd edition. In: Reading H.G., ed. John Wiley & Sons; 2009. 704 p.
4. Reineck H.E., Singh I.B. Depositional Sedimentary Environments (With Reference to Terrigenous Clastics). Springer-Verlag Berlin Heidelberg; 1980. 551 p. DOI: 10.1007/978-3-642-81498-3.
5. Muromtsev V.S. Elektrometricheskaya geologiya peschanykh tel — litologicheskikh lovushek nefti i gaza [Electrometric geology of sand bodies — oil and gas stratigraphic traps]. Leningrad: Nedra; 1984. 260 p. In Russ.
6. Braduchan Yu.V., Gol’bert A.V., Gurari F.G., Zakharov V.A., Bulynnikova S.P., Klimova I.G., Mesezhnikov M.S., Vyachkileva N.P., Kozlova G.E., Lebedev A.I., Nal’nyaeva T.I., Turbina A.S. Bazhenovskii gorizont Zapadnoi Sibiri (stratigrafiya, paleografiya, ekosistema, neftegazonosnost’) [Bazhenov Horizon of Western Siberia. Stratigraphy, paleogeography, ecosystem, oil bearing capacity]. Novosibirsk: Nauka; 1986. 217 p. In Russ.
7. Amon A.E., Alekseev V.P., Glebov A.F., Savenko V.A. Stratigrafiya i paleografiya mezozoisko-kainozoiskogo osadochnogo chekhla Shaimskogo neftegazonosnogo raiona (Zapadnaya Sibir’) [Stratigraphy and paleography of the Mesozoic-Cenozoic sedimentary cover of the Shaim oil and gas region (Western Siberia)]. Ekaterinburg: UGGU; 2010. 257 p. In Russ.
8. Galushkin Yu.I. Modelirovanie osadochnykh basseinov i otsenka ikh neftegazonosnosti [Modeling of sedimentary basins and assessment of their oil and gas potential]. Moscow: Nauchnyi mir; 2007. 456 p. In Russ.
9. Ermolkin V.I., Kerimov V.Yu. Geologiya i geokhimiya nefti i gaza: uchebnik dlya vuzov [Geology and geochemistry of oil and gas: textbook for universities]. Moscow: Nedra; 2012. 460 p. In Russ.
10. Neruchev S.G., Vassoevich N.B., Lopatin N.V. O shkale katageneza v svyazi s nefteobrazovaniem [Catagenesis scale in the context of oil and gas generation]. In: Tr. XV sessii Mezhdunarodnogo geologicheskogo kongressa. Doklady sovetskikh geologov. Goryuchie iskopaemye. Moscow: Nauka; 1976. pp. 47–62. In Russ.