The paper presents the updated data on geostructural features and mode of occurrence of Jurassic deposits in the northern West Siberia; this information in based on the results of sequence stratigraphy analysis of CDP seismic, drilling, and well logging data. The following factors determine geological structure and mode of occurrence of Jurassic series in the northern West Siberia: great depths; repeated regional pattern of sedimentation over the vast areas; large thickness; high values of thermal, depth, and catagenetic parameters of pay intervals; high lithofacies inhomogeneity; abnormal reservoir pressure; less good reservoir quality; higher condensate and solution gas content in gas and oil pools. It is shown that three plays are identified in the Jurassic deposits, they are: Lower-Middle Jurassic (except for Callovian), Callovian-Kimmeridgian, and Tithonian-Berriasian. Petroleum potential of the Jurassic sequences is evaluated. The authors present information on oil and gas occurrence in Zimny, Sharapovsky, Nadoyakhsky, Vymsky, and Malyshevsky reservoirs of the Lower-Middle Jurassic play, Sigovsky reservoir of the Callovian-Kimmeridgian play, and Jurassic-to-Cretaceous Yanovstansky reservoir of Tithonian-Berriasian play. The commercial hydrocarbon potential of the Lower-Middle Jurassic, Callovian-Kimmeridgian, and Tithonian-Berriasian plays is proved. Reliable quantitative estimates of the potential hydrocarbon resources of the Jurassic sequences are not yet available for the vast territory of northern West Siberia. Recommendations for oil and gas prospecting in Jurassic deposits in the northern West Siberia are given. The authors draw attention to new trends of petroleum exploration activities in the Jurassic interval of the section, which are related to the attempts to find various types of non-anticlinal objects at the depths accessible for drilling within the Ob-Laptevsky Ridge and flanks of the West Siberian Sedimentary Basin.

Il’mira N. Nizamutdinova ORCiD 
Chief Geologist
Geostra Research and Production Center,
3, ul. Luganskaya, Ufa, 450071, Russia
e-mail: nizamutdinovain@bngf.ru

​Viktor A. Baldin  ORCiD 
Candidate of Geological and Mineralogical Sciences,
Deputy Director General
Geostra Research and Production Center,
3, ul. Luganskaya, Ufa, 450071, Russia
e-mail: baldin@bngf.ru

Nail’ Z. Munasypov ORCiD
Candidate of Geological and Mineralogical Sciences,
Chief Geologist
Bashneftegeofizika Joint Stock Company,
13, Lenina ul., Ufa, 450077, Russia
e-mail: ail@bngf.ru

1. Baldin V.A., Igoshkin V.P., Munasypov N.Z., Nizamutdinova I.N. Stratigraphy of the Jurassic-cretaceous deposits in northeast of Western Siberia on the results of sequence-stratigraphic analysis. Geofizika. 2021;(3):2–17. In Russ.
2. Baldin V.A., Munasypov N.Z. Neoproterozoic-paleozoic and triassic sequencesof the Gydan and Taimyr peninsulas. Geofizika. 2017;(3): 76–88. In Russ.
3. Surkov V.S., Smirnov L.V., Gurari F.G. et al. Lower-middle Jurassic complex of the West Siberian plate: structure and petroleum potential.
Russian Geology and Geophysics. 2004;45(1):55–58. In Russ.
4. Shemin G.G. Regional’nye rezervuary nefti i gaza yurskikh otlozhenii severa Zapadno-Sibirskoi provintsii [Regional oil and gas reservoirs in the Jurassic formations of the northern West Siberian province]. Novosibirsk: Izd-vo SO RAN; 2014. 362 p. In Russ.
5. Kazanenkov V.A., Ershov S.V., Ryzhkova S.V., Borisov E.V., Ponomareva E.V., Popova N.I., Shaporina M.N. Geological structure and oil and gas potential of Jurassic and cretaceous regional reservoirs in Cara-Yamal region and prognosis of hydrocarbon distribution. Geologiya nefti i gaza. 2014;(1):27–49. In Russ.
6. Kurchikov A.R., Borodkin V.N., Nedosedkin A.S., Zaripov S.M. Geologicheskoe stroenie i perspektivy neftegazonosnosti Gydanskogo poluostrova severa Zapadnoi Sibiri [Geological structure and petroleum potential of the Gydan Peninsula in the northern West Siberia]. Nauka i TEHK. 2012;(3):10–15. In Russ.
7. Kurchikov A.R., Borodkin V.N. Features of geological structure and oil and gas occurrence within the Jurassic play, Western Siberia. Novosibirsk: Izdatelstvo SO RAN; 2015. 140 p. In Russ.
8. Borodkin V.N., Smirnov O.A., Kurchikov A.R., Lukashov A.V., Galinskii K.A. A model of the structure and oil and gas prospects for oil and gas potential of the Jurassic regional complex in the joint zone of the Gydan, Tazov peninsula and the Yamal peninsula of Western Siberia according to 3d seismic data. Geologiya, geofizika i razrabotki neftyanykh i gazovykh mestorozhdenii. 2021;(2):38–52. DOI: 10.33285/2413-5011-2021-2(350)-38-52. In Russ.
9. Panarin I.A. Hydrocarbon identification forecast in Jurassic depositional sequences of the Western Siberia northern part and the Kara sea water area. Georesursy = Georesources. 2012;48(6):56–60. In Russ.
10. Panarin I.A. New Approach to Ranking of Jurassic Sedimentary Complexes of the Northern Part of the West Siberian Petroleum Basin. Georesursy = Georesources. 2017;19(4):311–318. DOI: 10.18599/grs.19.4.1. In Russ.
11. Baldin V.A., Igoshkin V.P., Munasypov N.Z., Nizamutdinova I.N. Problems and methods of stratification(as exemplified by Jurassiccretaceous sediments in Northeastern West Siberia). Geofizika. 2020;(3):17–30. In Russ.
12. Baldin V.A. Definition of the largest Ob-Laptevsky ridge in the northern Siberia. Tezisy dokladov X mezhdunarodnoi nauchno-prakticheskoi konferentsii EAGE «Geomodel’-2008» (11–22 September, 2008). Gelendzhik, 2008. DOI: 10.3997/2214-4609.201404288. In Russ.
13. Baldin V.A., Munasypov N.Z., Sharafutdinov T.R. About oil-gas-geological zoning of West Siberia. Geofizika. 2017;(3):62–68. In Russ.
14. Baldin V.A., Munasypov N.Z., Sharafutdinov T.R. More precise definition of West Siberian Basin borders on Taimyr Peninsula. Geologiya nefti i gaza. 2018;(3):59–74. DOI: 10.31087/0016-7894-2018-3-59-74. In Russ.
15. Fursenko E.A., Burukhina A.I., Kim N.S., Rodchenko A.P. Current Understanding of the Geochemistry of Organic Matter and Naphthydes in Mesozoic Rocks of Arctic Western Siberia. Geochemistry international. 2021;66(12):1077–1105. DOI: 10.1134/S0016702921120028. In Russ.
16. Pyatnitskaya G.R., Skorobogatov V.A. Studying and developing hydrocarbon potential of lower-middle-Jurassic deposits in northern areas of Western Siberia: resume and perspectives. Vesti gazovoi nauki. 2018;35(3):86–101. In Russ.
17. Skorobogatov V.A. Jurassic productive complex of Western Siberia: past, present and future. Vesti gazovoi nauki. 2017;31(3):36–56.
18. Astaf’ev D.A., Tolstikov A.V., Kalita M.A., Naumova L.A., Kabalin M.Yu. Prediction of oil and gas presence in Jurassic-cretaceous sediments within the area of Ob and Taz gulfs at Kara sea. Vesti gazovoi nauki. 2018;35(3):290–305. In Russ.
19. Baldin V.A. Ob-Laptevsky ridge as the largest super-order structure and a new oil and gas accumulation zone in the northern Siberia. In: EAGE «Tyumen’ 2015»: mat-ly IV mezhdunarodnoi geologicheskoi konferentsii. Tyumen, 23–27 March 2015. In Russ.
20. Munasypov N.Z., Nizamutdinova I.N., Baldin V.A. Jurassic series in the north-eastern part of Western Siberia: prediction of different types of non-anticlinal hydrocarbon traps. Geologiya nefti i gaza. 2019;(3):87–97. DOI: 10.31087/0016-7894-2019-3-87-97. In Russ.
21. Zyza E.A., Fedorov S.A., Igonin I.S., Kurkin A.A. Model of the Geological Structure of Bajocian and Bathonian Deposits of the Yamal-Gydan Region. In: 8th Saint Petersburg International Conference & Exhibition Saint Petersburg 2018. Innovations in Geosciences — Time for Breakthrough Saint Petersburg, Russia, 9–12 April, 2018. Saint Petersburg; 2018. pp. 1–6. DOI: 10.3997/2214-4609.201800292. In Russ.