Pages
Download article

Geochemistry of the insoluble organic matter (kerogen) components in Jurassic deposits in northern regions of the Latitudinal Ob area

L.S. Borisova, А.N. Fomin, Е.S. Yaroslavtseva

Original article

DOI https://doi.org/10.18599/grs.2020.3.21-27

21-27
rus.
eng.

open access

Under a Creative Commons license
The paper addresses the issues of evaluation of the oil-generating potential of deep buried Jurassic sediments of the Nadym-Taz interfluve area within West Siberian basin (WSB) on the basis of geochemical data. Rock samples from superdeep (SD) and deep boreholes that tapped the Mesozoic-Cenozoic sedimentary cover in the north of the central part of WSB (Yen-Yakhinskaya, Yevo-Yakhinskaya, Yarudeiskaya, Tyumenskaya and other wells) were used as the study materials. A portion of the organic matter (OM) that is insoluble in organic solvents (i.e. kerogen) sampled from Upper, Middle and Lower Jurassic deposits (54 samples) was chosen to be object of the study. The methods used for the comprehensive study of the kerogen involved elemental and isotope analyses and Rock-Eval pyrolysis, which allowed to obtain important information about the genetic type of OM, its maturity, and residual oil-generation potential.
 
Application of the Surfer and Corel Draw software enabled construction of schematic maps and diagrams reflecting changes in the most informative geochemical parameters of kerogen (as well as their analysis) in the study area and down the section (from Upper to Lower Jurassic). The geochemical data obtained indicate that the highest generation potential of OM of the Jurassic interval of the Nadym-Taz interfluve is attributed to the Bazhenov horizon, as well as to individual reservoirs of the Malyshevka, Leontievskiy, Sharapovo, and Kiterbyut horizons. The level of maturity of OM in Upper and Middle Jurassic sediments allowed to infer that these may contain preserved accumulations primarily of oils and wet gases, while Lower Jurassic deposits may host wet and dry gases.
 

insoluble organic matter, oil-generating potential of Jurassic deposits, Western Siberia

 
  • Bogorodskaya L.I. (1973). Method for determination of oxygen-containing functional groups in debituminized dispersed organic matter] Modern methods of analysis in organic geochemistry. Novosibirsk: SNIIGGiMS, p. 14. (In Russ.)
  • Bogorodskaya L.I., Kontorovich A.E. (1982). Chemical composition of organic matter dispersed in rocks and ways of its classification. Sedikachites at different stages of lithogenesis. Moscow: Nauka, p. 49. (In Russ.)
  • Bogorodskaya L.I., Kontorovich A.E., Larichev A.I. (2005). Kerogen. Study methods, geochemical interpretation. Novosibirsk: Geo, 255 p. (In Russ.)
  • Espitalie J. (1988). Use of Tmax as a maturation in dexin petroleum exploration. Petroleum Geochmistry and exploration in the Afro-Asian Region. Rotterdam, BROOKFIELD, pp. 67-73.
  • Fomin A.N., Kontorovich A.E., Krasavchikov V.O. (2001). Catagenesis of organic matter and petroleum potential of the jurassic, triassic, and paleozoic deposits in the northern areas of the west siberian megabasin. Geologiya i geofizika, 42(11), pp. 1875-1887. (In Russ.)
  • Kontorovich A.E. (2004). Essays on the theory of naphthydogenesis. Novosibirsk: SO RAN, 548 p. (In Russ.)
  • Kontorovich A.E., Bogorodskaya L.I., Borisova L.S., Burshtein L.M., Ismagilov Z.R., Efimova O.S., Kostyreva E.A., Lemina N.M., Ryzhkova S.V., Sozinov S.A., Fomin A.N. (2019). Geochemistry and catagenetic transformations of kerogen from the Bazhenov horizon. Geochemistry International, 57, pp. 621–634. https://doi.org/10.1134/S0016702919060028
  • Kontorovich A.E., Bogorodskaya L.I., Golyshev S.I. (1985). Distribution of stable carbon isotopes in sedicachites of various regions. Geologiya i geofizika, 7, pp. 3–11. (In Russ.)
  • Kontorovich A.E., Danilova V.P., Fomin A.N., Kostyreva E.A., Borisova L.S., Melenevskii V.N. (2002). Distribution of stable carbon isotopes in sedicachites of various regions. Izvestiya TPU. Geologiya i razrabotka neftyanykh i gazovykh mestorozhdenii = Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 305(8), p. 45. (In Russ.)
  • Kontorovich A.E., Kontorovich V.A., Ryzhkova S.V., Shurygin B.N., Vakulenko L.G., Gaideburova E.A., Danilova V.P., Kazanenkov V.A., Kim N.S., Kostyreva E.A., Moskvin V.I., Yan P.A. (2013). Jurassic paleogeography of the West Siberian sedimentary basin. Russian Geology and Geophysics, 54(8), pp. 747–779. (In Russ.) https://doi.org/10.1016/j.rgg.2013.07.002
  • Methodical recommendations for the application of the pyrolytic method in organic geochemistry. (1985). Ed. A.E. Kontorovich. Novosibirsk: SNIIGiMS, 42 p. (In Russ.)
  • Oil and gas basins and regions of Siberia. West Siberian Basin. (1994). Ed. A.E. Kontorovich. Novosibirsk: OIGGM SO RAN, SNIIGGiMS, 201 p. (In Russ.)
  • Nekhaev A.Yu., Moskvin V.I., Melenevskii V.N. (2009). Estimation of the scale of hydrocarbon generation in the Lower Jurassic deposits of the Nadym-Taz interfluve. Novosibirsk: GeoSibir, p. 51. (In Russ.)
  • Parparova G.M., Neruchev S.G. (1977). Fundamentals of the genetic classification of organic matter. Geologiya i geofizika, 5, pp. 45–51. (In Russ.)
  • Tissot B., Welte D. (1981). Petroleum Formation and Occurrence. Moscow: Mir, 499 p. (In Russ.)
  • Uspenskii V.A., Indenbom F.B., Chernysheva A.S., Sennikova V.N. (1958). To the development of a genetic classification of dispersed organic matter. Issues of oil formation. Leningrad: Gostoptekhizdat, p. 221. (In Russ.)
  •  
Lyubov S. Borisova
Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University
3, Ak.Koptyug ave., Novosibirsk, 630090, Russian Federation
 
Alexander N. Fomin
Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University
3, Ak.Koptyug ave., Novosibirsk, 630090, Russian Federation
 
Ekaterina S. Yaroslavtseva
Trofimuk Institute of Petroleum Geology and Geophysics of the Siberian Branch of the Russian Academy of Sciences
3, Ak.Koptyug ave., Novosibirsk, 630090, Russian Federation
 

For citation:

Borisova L.S., Fomin А.N., Yaroslavtseva Е.S. (2020). Geochemistry of the insoluble organic matter (kerogen) components in Jurassic deposits in northern regions of the Latitudinal Ob area. Georesursy = Georesources, 22(3), pp. 21–27. DOI: https://doi.org/10.18599/grs.2020.3.21-27