Formation Conditions and Hydrocarbons Generation Potential of Oil Source Rocks of South Tatar Arch and Surrounding Areas

The work studied the lithological and geochemical characteristics of oil and gas source rocks of the central part of the Volga-Ural oil and gas bearing province. The purpose of the work was to reconstruct their formation conditions, study the generation potential and maturity of organic matter, and examine prospects for industrial development. The rocks were studied macroscopically, as well as X-ray analysis, pyrolysis using the Rock-Eval method, SARA analysis, and gas chromatography-mass spectrometry. The formation of the Domanik deposits, Bobrikovsky and Pashiysky horizon mudstones, and Upper Kazan substage clays have all been proven to have occurred in a maritime environment. The content of organic matter in the rocks varies from 0.35 to 11.16%. Minute amounts of organic matter that are difficult to accurately in terms of their geochemical properties can be found in the clayey deposits of the Vereisky and Timan horizons. The Upper Kazan substage clays contain type II/ III kerogen. Mudstones of the Bobrikovsky and Pashiysky horizons, as well as Domanik deposits, contain organic matter represented by type II kerogen. The data obtained may indicate common mechanisms for the accumulation of sapropelic organic matter on the territory of the Volga-Ural basin from Pashian (Frasnian stage) to Bobrikovian (Visean stage) times. It was revealed that the studied deposits are at the stage of catagenesis (PC-MK1). At the same time, Domanik deposits have very good and excellent generation potential, which is characterized by the greatest maturity. Mudstones of the Bobrikovsky horizon have similar generation potential.

1. Aliev M.M., Vissarionova A.Ya., Kuznetsov Yu.I., Semenova E.G., Sestnova L.P., Travina L.M., Khachatryan R.O., Shelnova A.K., Yarikov G.M. (1975). Carboniferous deposits of the Volga-Ural oil and gas province. Moscow: Nedra, 264 p. (In Russ.)

2. Alzahabi A., AlQahtani G., Soliman M.Y., Bateman R.M., Asquith G., Vadapalli R. (2015). Fracturability index is a mineralogical index: a new approach for fracturing decision. SPE Saudi Arabia Section Annual Technical Symposium and Exhibition, SPE-178033-MS. https://doi.org/10.2118/178033-MS

3. Ananyev V.V. (2007). Forecast assessment of the resource base of MendymDomani deposits as the main source of hydrocarbons in the central regions of the Volga-Ural oil and gas province. Geologiya nefti i gaza = Geology of oil and gas, 1, pp. 32–38. (In Russ.)

4. Astarkin S.V., Kolpakov V.V., Goncharenko O.P., Pisarenko Yu.A., Morozov V.P. (2017). Lithological and paleogeographic characteristics of the Bobrikovsky stage of sedimentation on the territory of the Orenburg region. Neftyanoe khozyaystvo = Oil Industry, 10, pp. 75–79. (In Russ.)

5. Bazhenova O.K., Burlin Yu.K., Sokolov B.A., Khain V.E. (2004). Geology and geochemistry of oil and gas. Moscow: Academy Publ., 415 p. (In Russ.)

6. Burov B.V. (2003). Geology of Tatarstan: Stratigraphy and tectonics. Moscow: GEOS, 402 p. (In Russ.)

7. Bushnev D.A, Burdel’naya N.S., Ponomarenko E.S., Zubova (Kiryukhina) T.A. (2016). Anoxia of the Domanik basin of the Timan-Pechora region. Litologiya i poleznye iskopaemye, 4, pp. 329–335. (In Russ.)

8. Fadeeva N.P., Kozlova E.V., Poludetkina E.N., Shardanova T.A., Pronina N.V., Stupakova A.V., Kalmykov G.A., Khomyak A.N. (2015). Generation potential of rocks of the Domanik formation of the Volga-Ural oil and gas basin. Bulletin of Moscow University, 4(6), pp. 44–52. (In Russ.)

9. Frank-Kamenetskii V.A. (ed.) (1983). X-ray analysis of the main types of rock-forming minerals (layered and framework silicates). Leningrad: Nedra, 359 p. (In Russ.)

10. Galimov, E.M., Kamaleeva, A.I. (2015). Source of hydrocarbons in the supergiant Romashkino oilfield (Tatarstan): Recharge from the crystalline basement or source sediments?. Geochem. Int., 53, pp. 95–112 https://doi.org/10.1134/S0016702915020032

11. Gordadze G.N., Tikhomirov V.I. (2007). About the sources of oils in the northeast of Tatarstan. Neftekhimiya, 47(6), pp. 422–431. (In Russ.)

12. Hu T. Pang X., Jiang F., Wang Q., Liu X., Wang Z., Jiang S., Wu G., Li C., Xu T., Li M., Yu J., Zhang C. (2021). Movable oil content evaluation of lacustrine organic-rich shales: Methods and a novel quantitative evaluation model. Earth-Science Reviews, 214, 103545. https://doi.org/10.1016/j.earscirev.2021.103545

13. Huang W.-Y., Meinschein W.G. (1979). Sterols as ecological indicators. Geochemica et Cosmochimica Acta, 43(5), pp. 739–745. https://doi.org/10.1016/0016-7037(79)90257-6

14. Hughes W.B., Holba A.G., Dzou L.I. (1995). The ratios of dibenzothiophene to phenantrene and pristine to phytane as indicators of depositional environment and lithology of petroleum source rocks. Geochimica et Cosmochimica Acta, 59(17), pp. 3581–3598. https://doi.org/10.1016/0016-7037(95)00225-O

15. Hunt J. (1982). Geochemistry and geology of oil. Moscow: Mir, 706 p. (In Russ.)

16. Kabanov P.B., Gouwy S.A. (2020). The type section of the Canol Formation (Devonian black shale) at Powell Creek: Critical assessment and correlation in the northern Cordillera, NWT, Canada. Bulletin of Canadian Petroleum Geology, 68(4), pp. 123–140. https://doi.org/10.35767/gscpgbull.68.4.123

17. Kabanov P., Gouwy S., van der Boon A., Grasby S. (2023). Nature of Devonian anoxic events based on multiproxy records from Panthalassa, NW Canada. Global and Planetary Change, 227, 104176, https://doi.org/10.1016/j.gloplacha.2023.104176

18. Katz B., Gao L., Little J., Zhao Y.R. (2021). Geology still matters – Unconventional petroleum system disappointments and failures. Unconventional Resources, 1, pp. 18–38. https://doi.org/10.1016/j.uncres.2021.12.001

19. Khayuzkin A.S., Morozov V.P., Kolchugin A.N., Eskin A.A., Eskina G.M., Korolev E.A., Zakharova N.S. (2020). Mineralogical and lithological properties of Domanikites from the south-east of Tatarstan Republic. IOP Conference Series: Earth and Environmental Science, 516, 012011. https://doi.org/10.1088/1755-1315/516/1/012011

20. Kidder D.L., Worsley T.R. (2010). Phanerozoic Large Igneous Provinces (LIPs), HEATT (Haline Euxinic Acidic Thermal Transgression) episodes, and mass extinctions. Palaeogeography, Palaeoclimatology, Palaeoecology, 295(1–2), pp. 162–191. https://doi.org/10.1016/j.palaeo.2010.05.036

21. Kontorovich A.E., Melenevsky V.N., Ivanova E.N., Fomin A.N. (2004). Phenanthrene, aromatic steranes and dibenzothiophenes in Jurassic sediments of the West Siberian oil and gas basin and their significance for organic geochemistry. Geologiya i geofizika = Russian Geology and Geophysics, 45(7), pp. 873–883. (In Russ.)

22. Kontorovich A.E., Yan P.A., Zamirailova A.G., Kostyreva E.A., Eder V.G. (2016). Classification of rocks of the Bazhenov Formation. Geologiya i geofizika = Geology and Geophysics, 57(11), pp. 2034–2043. https://doi.org/10.15372/GiG20161106

23. Larochkina I.A. (2008). Geological foundations of searches and exploration of oil and gas fields on the territory of the Republic of Tatarstan. Kazan: PF Gart LLC, 210 p. (In Russ.)

24. Liang X., Jin Z., Philippov V., Obryadchikov O., Zhong D., Liu Q., Uspensky B., Morozov V. (2020). Sedimentary characteristics and evolution of Domanik facies from the Devonian–Carboniferous regression in the southern Volga-Ural Basin. Marine and Petroleum Geology, 119, 104438. https://doi.org/10.1016/j.marpetgeo.2020.104438

25. Lopatin N.P., Yemets T.P. (1987). Pyrolysis in oil and gas geochemistry. Moscow: Nauka, 143 p. (In Russ.)

26. Morov V.P., Naugolnykh S.V., Varenov D.V., Varenova T.V., Morova A.A., Sidorov A.A. (2016). Fossil plants of the Kazanian stage of the Middle Volga region. Fitoraznoobrazie Vostochnoy Evropy, 10(1), pp. 34–67. (In Russ.)

27. Morozov V.P., Khayuzkin A.S., Korolev E.A., Kolchugin A.N., Mukhamedyarova A.N., Morozova E.V., Eskin A.A., Nazimov N.A., Gazeeva F. M., Zakharova N.S. (2022). Geological prerequisites for searching for rocks with enhanced reservoir properties in Domanik-type deposits on the territory of the Republic of Tatarstan. Georesursy = Georesources, 24(4), pp. 40–49. (In Russ.) https://doi.org/10.18599/grs.2022.4.3

28. Nurgalieva N.G., Chernova I.Yu., Nurgaliev D.K. (2008). Lingul clays: lithological features of the regional benchmark. Neftegazovoe delo, 1, pp. 1–23. (In Russ.)

29. Nurgalieva N.G., Silantiev V.V., Vetoshkina O.S., Urazaeva M.N. (2012). Isotope Carbon and Oxygen Indicators of the Key Section of Urzhumian and Tatarian Formations. Uchenye Zapiski Kazanskogo Universiteta Seriya Estestvennye Nauki, 154(1), pp. 189–196. (In Russ.)

30. Pe t e rs K.E . (1986). Gui de l i ne s for e va l ua t i ng pe t rol e um source rock using programmed pyrolysis. Bulletin of the American Association of Petroleum Geologists, 70(3), pp. 318–329. https://doi.org/10.1306/94885688-1704-11D7-8645000102C1865D

31. Pozner V.M., Kirina T.I., Porfiryev G.S. (1957). Volga-Ural oil-bearing region. Carboniferous deposits. Leningrad: Gostoptekhizdat, 289 p. (In Russ.)

32. Prishchepa, O. M., Averyanova O. Yu. (2017). Approaches to assessing the hydrocarbon potential of shale strata using the example of Domanik deposits in the Timan-Pechora province. Neftyanaya provintsiya, 1(9), pp. 19–49. (In Russ.)

33. Ronov A.B. (1993). Stratisphere or sedimentary shell of the Earth. Moscow: Nauka, 144 p. (In Russ.)

34. Saeed S.A., Hakimi M.H., Al-Muntaser A.A., Khamieva A.N., Varfolomeev M.A., Morozov V.P., Lashin A., Abdelaal M.A., Suwaid M.A., Mustapha K.A., Djimasbe R., Kadyrov R.I., Gareev B.I., Kwofie M. (2023). Geochemical, mineralogical and petrographical characteristics of the domanik formation from north samara region in the volga-ural basin, Russia: Implication for unconventional tight oil reservoir potential. Journal of Petroleum Science and Engineering, 220(A), 111240. https://doi.org/10.1016/j.petrol.2022.111240

35. Schwark L., Frimmel A. (2004). Chemostratigraphy of the Posidonia Black Shale, SW-Germany: II. Assessment of extent and persistence of photic-zone anoxia using aryl isoprenoid distributions. Chemical Geology, 206(3–4), pp. 231–248, https://doi.org/10.1016/j.chemgeo.2003.12.008

36. Sementovsky Yu.V. (1973). Conditions for the formation of mineral deposits in the Late Permian era in the east of the Russian Platform. Kazan: Tatknigoizdat, 255 p. (In Russ.)

37. Silantyev V.V., Validov M.F., Miftakhutdinova D.N., Morozov V.P., Ganiev B.G., Lutfullin A.A., Shumatbaev K.D., Khabipov R.M., Nurgalieva N. .G., Tolokonnikova Z.A., Korolev E.A., Sudakov V.A., Smirnova A.V., Golod K.A., Leontiev A.A., Shamsiev R.R., Noykin M.V. ., Kosarev V.E., Nikonorova D.A., Akhmetov R.F. (2022). Sedimentation model of the Pashi horizon (Devonian terrigenous strata) of the South Tatar arch of the Volga-Ural oil and gas province. Georesursy = Georesources, 24(4), pp. 12–39. (In Russ.) https://doi.org/10.18599/grs.2022.4.2

38. Stupakova A.V., Kalmykov G.A., Korobova N.I., Fadeeva N.P., Gatovsky Yu.A., Suslova A.A., Sautkin R.S., Pronina N.V., Bolshakova M. A.A., Zavyalova A.P., Chupakhina V.V., Petrakova N.N., Miftakhova A.A. (2017). Domanik deposits of the Volga-Ural basin types of section, conditions of formation and prospects for oil and gas potential. Georesursy = Georesources, 1, pp. 112–124. (In Russ.) http://doi.org/10.18599/grs.19.12

39. Tissot B.P., Welte D.H. (1978). Petroleum Formation and Occurrence: A New Approach to Oil and Gas Exploration. Berlin; Heidelberg; New York: Springer, XVIII+538 p.

40. Ulmishek G. F., Shalomeenko A. V., Holton D. Yu., Dakhnova M. V. (2017). Unconventional oil reservoirs in the Domanik formation of the Orenburg region. Geologiya nefti i gaza = Geology of oil and gas, 5, pp. 67–77. (In Russ.)

41. Varlamov A.I., Petersilye V.I., Poroskun V.I., Fortunatova N.K., Komar N.V., Shvets-Teneta-Guriy A.G. (2017). Methodology for estimating oil reserves in Domanik-type deposits. Geologiya nefti i gaza = Geology of oil and gas, 5, pp. 51–65. (In Russ.)

42. Vassoevich N.B. (1986). Selected works. Geochemistry of organic matter and the origin of oil. Moscow: Nauka, 368 p. (In Russ.)

43. Zumberge J., Illich H., Waite L. (2016). Petroleum geochemistry of the Cenomanian Turonian Eagle Ford oils of South Texas. Breyer J.A. (Ed.), The Eagle Ford Shale: A Renaissance in U.S. Oil Production, AAPG, pp. 135–165. https://doi.org/10.1306/13541960M110449