Change in thermal regime and katagenesis of an organic matter of sedimentary rocks of the western part of the South Caspian Basin

Authors: M.G. Duduyeva (Gazpromneft NTC LLC, RF, Saint-Petersburg), Yu.I. Galushkin (Lomonosov Moscow State University, RF, Moscow)

Key words: South Caspian Basin, oil-generating potential, vitrinite reflectance.

The features of the thermal regime of the sedimentary basin of the South Caspian and their reflection in the history of changes in katagenesis of pool rock organic matter are investigated. Numerical reconstructions of the evolution of the thermal regime and the history of pool sinking obtained with application of the pools simulator system GALO are used. Modeling assumes a high and noticeably unsteady modern mantle thermal conditions in the region and expressed activity of processes of dispersion heat transfer, increasing the effective thermal conductivity of the upper sedimentary rocks by several times. Assessment of the degree of katagenesis of organic matter in sedimentary section rocks of the western part of the South Caspian Basin has shown that the rocks of the lower Paleocene, Lower Eocene and Lower Maikop can only be regarded as a gas-generating, while the Middle Maikop rocks can be considered as promising for the generation both liquid and gas hydrocarbons.

References
1. Lubimova E.A., Feldman I.S., Eat flow, temperature, and electrical
conductivity of the crust and upper mantle in the U.S.S.R, Tectonophysics,
1970, V. 10, no. 1-3, pp. 245-281.
2. Glumov I.F., Malovitskiy Ya.P., Novikov A.A., Senin B.V., Regional'naya
geologiya i neftegazonosnost' Kaspiyskogo morya (Regional geology
and oil and gas potential of the Caspian Sea), Moscow: Nedra-Biznestsentr
Publ., 2004, 342 p.
3. Guliev I.S., Fedorov D.L., Kulakov S.I., Neftegazonosnost' Kaspiyskogo
regiona (Oil and gas potential of the Caspian region), Baku: Nafta-
Press Publ., 2009, 409 p.
4. Alieva E.G., Geologiya nefti i gaza – The journal Oil and Gas Geology,
2003, no. 5, pp. 20-31.
5. Kerimov V.Yu., Rachinskiy M.Z., Karnaukhov S.M., Mustaev R.N.,
Otechestvennaya geologiya, 2012, no. 3, pp. 17 – 24.
6. Khain V.E., Chekhovich P.A., Collected papers “Mezhdunarodnaya
tektonicheskaya karta Kaspiyskogo morya i ego obramleniya” (International
tectonic map of the Caspian Sea and its surroundings),
Moscow: Nauchnyy mir Publ., 2003, pp. 66-74.
7. Smith-Rouch L.S., Oligocene-Miocene Maykop/Diatom total petroleum
system of the South Caspian Basin province, Azerbaijan, Iran,
and Turkmenistan, Bulletin 2201-1, U.S. Geological Survey Reston, Virginia,
2006, 27 p.
8. Jackson Ja., Priestley K., Allen M., Berberian M., Active tectonics of
the South Caspian Basin, Geophysical Journal Internat., 2002, no. 148,
pp. 214-245.
9. Galushkin Yu.I., Modelirovanie osadochnykh basseynov i otsenka ikh
neftegazonosnosti (Modeling of sedimentary basins and evaluation of
their oil and gas potential), Moscow: Nauchnyy mir Publ., 2007, 456 p.
10. Frakes L.A., Climates throughout geological time, Amsterdam: Elsevier,
1979, pp. 1-310.
11. Ali-Zade Ak.A., Aliev S.A., Mamedalizade A.M., Gamzaev G.A.,
Geokhimiya – Geochemistry International, 1982, no. 9, pp. 1370-1373.
12. Kotrovskiy V.V., Geotermicheskie usloviya obrazovaniya i
razmeshcheniya zalezhey uglevodorodov v osadochnom chekhle
Prikaspiyskoy vpadiny (Geothermal conditions of formation and
placement of hydrocarbon deposits in the sedimentary cover of the
Caspian Basin), Saratov: Publ. of Saratov University, 1986, 155 p.
13. Smirnov Ya.B., Teplovoe pole territorii SSSR: poyasnitel'naya zapiska
k kartam tepllovogo potoka i glubinnykh temperatur v masshtabe 1:10
000 000 (The thermal field in the USSR: an explanatory note to the maps
of heat flow and deep temperatures in the scale of 1:10 000 000),
Moscow: Publ. of GUGK, 1980, 150 p.
14. Garven G. and Freeze R.A., Theoretical analysis of the role of
groundwater flow in the genesis of stratabound ore deposits, Part 1.
Mathematical and numerical model, Amer. J. Science, 1984, V. 284,
December, pp. 1085-1124.
15. Sweeney J.J., Burnham A.K., Evolution of a simple model of vitrinite
reflectance based on chemical kinetics, AAPG Bull., 1990, V. 74, no. 10,
pp. 1559-1570. 

Key words: South Caspian Basin, oil-generating potential, vitrinite reflectance.

The features of the thermal regime of the sedimentary basin of the South Caspian and their reflection in the history of changes in katagenesis of pool rock organic matter are investigated. Numerical reconstructions of the evolution of the thermal regime and the history of pool sinking obtained with application of the pools simulator system GALO are used. Modeling assumes a high and noticeably unsteady modern mantle thermal conditions in the region and expressed activity of processes of dispersion heat transfer, increasing the effective thermal conductivity of the upper sedimentary rocks by several times. Assessment of the degree of katagenesis of organic matter in sedimentary section rocks of the western part of the South Caspian Basin has shown that the rocks of the lower Paleocene, Lower Eocene and Lower Maikop can only be regarded as a gas-generating, while the Middle Maikop rocks can be considered as promising for the generation both liquid and gas hydrocarbons.

References
1. Lubimova E.A., Feldman I.S., Eat flow, temperature, and electrical
conductivity of the crust and upper mantle in the U.S.S.R, Tectonophysics,
1970, V. 10, no. 1-3, pp. 245-281.
2. Glumov I.F., Malovitskiy Ya.P., Novikov A.A., Senin B.V., Regional'naya
geologiya i neftegazonosnost' Kaspiyskogo morya (Regional geology
and oil and gas potential of the Caspian Sea), Moscow: Nedra-Biznestsentr
Publ., 2004, 342 p.
3. Guliev I.S., Fedorov D.L., Kulakov S.I., Neftegazonosnost' Kaspiyskogo
regiona (Oil and gas potential of the Caspian region), Baku: Nafta-
Press Publ., 2009, 409 p.
4. Alieva E.G., Geologiya nefti i gaza – The journal Oil and Gas Geology,
2003, no. 5, pp. 20-31.
5. Kerimov V.Yu., Rachinskiy M.Z., Karnaukhov S.M., Mustaev R.N.,
Otechestvennaya geologiya, 2012, no. 3, pp. 17 – 24.
6. Khain V.E., Chekhovich P.A., Collected papers “Mezhdunarodnaya
tektonicheskaya karta Kaspiyskogo morya i ego obramleniya” (International
tectonic map of the Caspian Sea and its surroundings),
Moscow: Nauchnyy mir Publ., 2003, pp. 66-74.
7. Smith-Rouch L.S., Oligocene-Miocene Maykop/Diatom total petroleum
system of the South Caspian Basin province, Azerbaijan, Iran,
and Turkmenistan, Bulletin 2201-1, U.S. Geological Survey Reston, Virginia,
2006, 27 p.
8. Jackson Ja., Priestley K., Allen M., Berberian M., Active tectonics of
the South Caspian Basin, Geophysical Journal Internat., 2002, no. 148,
pp. 214-245.
9. Galushkin Yu.I., Modelirovanie osadochnykh basseynov i otsenka ikh
neftegazonosnosti (Modeling of sedimentary basins and evaluation of
their oil and gas potential), Moscow: Nauchnyy mir Publ., 2007, 456 p.
10. Frakes L.A., Climates throughout geological time, Amsterdam: Elsevier,
1979, pp. 1-310.
11. Ali-Zade Ak.A., Aliev S.A., Mamedalizade A.M., Gamzaev G.A.,
Geokhimiya – Geochemistry International, 1982, no. 9, pp. 1370-1373.
12. Kotrovskiy V.V., Geotermicheskie usloviya obrazovaniya i
razmeshcheniya zalezhey uglevodorodov v osadochnom chekhle
Prikaspiyskoy vpadiny (Geothermal conditions of formation and
placement of hydrocarbon deposits in the sedimentary cover of the
Caspian Basin), Saratov: Publ. of Saratov University, 1986, 155 p.
13. Smirnov Ya.B., Teplovoe pole territorii SSSR: poyasnitel'naya zapiska
k kartam tepllovogo potoka i glubinnykh temperatur v masshtabe 1:10
000 000 (The thermal field in the USSR: an explanatory note to the maps
of heat flow and deep temperatures in the scale of 1:10 000 000),
Moscow: Publ. of GUGK, 1980, 150 p.
14. Garven G. and Freeze R.A., Theoretical analysis of the role of
groundwater flow in the genesis of stratabound ore deposits, Part 1.
Mathematical and numerical model, Amer. J. Science, 1984, V. 284,
December, pp. 1085-1124.
15. Sweeney J.J., Burnham A.K., Evolution of a simple model of vitrinite
reflectance based on chemical kinetics, AAPG Bull., 1990, V. 74, no. 10,
pp. 1559-1570. 


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