Comparative analysis of catagenetic maturity models for Maykop sediments in Azerbaijan
Oil Gas Scientific Research Project Institute, Baku, Azerbaijan AZ1122, Baku, Azerbaijan, H.Zardabi prosp., 88a
Burial history, lithological composition of sediments, geochemical properties of organic matter and geothermal conditions were simulated for three different localities in Azerbaijan using basin modeling methods and software tools. Taking into account that this source interval can make voluminous contribution to hydrocarbon generation we have constructed catagenetic maturity models for these strata. Modeling of the temperature field from the beginning of sedimentation to the modern stage of basin formation is based on the principle of gradual reduction of temperature. In this way a good agreement between calculated temperature values and borehole temperature measurements has been obtained. The maximum paleotemperature of rocks is reflected in the reflectance values of vitrinite. To display the validity of temperature field modelling results we have provided a matching diagram plotting calculated vitrinite reflectance versus measured on core samples values. The catagenetic maturity models constructed suggest that in deeply buried Maykop strata of the Lower Kura, Yevlakh-Agjabadi depressions and Jalilabad trough oil window has subsided to different depths depending on geological evolution. Among localities considered the highest degree of catagenetic transformation has been reached in sediments within depocentral part of the Lower Kura depression. The deepest layers of the Oligocene – Lower Miocene interval have passed peak oil window and even more, realized complete hydrocarbon generation capability. In other areas thermal transformation ratio of the Maykop organic matter is estimated to be lower than that in the Lower Kura depression.
Keywords: Maykop suite, organic matter, vitrinite reflectance, temperature, maturity modeling
Abrams M.A., Narimanov A.A. Geochemical evolution of hydrocarbons and their potential sources in the western south Caspian depression, Republic of Azerbaijan. Marine and petroleum geology, Vol. 14, No. 4, 1997, pp. 451-468.
Aliyev Ad.A., Bayramov A.A. New outlook at oily-gaseous features of Paleocene-Miocene deposits of Pre-Talysh depression. Azerbaijan Oil Industry, No. 10, 2011, pp. 12-16 (in Russian).
Ali-zadeh A.A., Ahmedov G.A., Aliyev H-M.A. etc. Assessment of the oil-producing properties for the Meso-Cenozoic deposits of Azerbaijan. Elm. Baku, 1975, 140 p. (in Russian).
Feyzullayev A.A., Abbasova S.V., Tagiyev M.F. Hydrocarbon potential of Oligocene-Miocene sediments of the SE Greater Caucasus and Talysh: a comparative analysis. Conference proceedings, EAGE the Caspian and Black Sea conference, Baku, Azerbaijan, (paper No.A06), 2008, 6-8 October, DOI: https://doi.org/10.3997/2214-4609.20146085.
Feyzullayev A.A., Tagiyev M.F., Lerche I. On the origin of hydrocarbons in the main Lower Pliocene reservoirs of the South Caspian Basin, Azerbaijan. Energy, exploration & exploitation, Vol. 33, No. 1, 2015, pp. 1-14.
Geology of Azerbaijan (ed. Alizadeh Ak.A.). Volume VII. Oil and gas. Nafta-Press. Baku, 2008, 672 p. (in Russian).
Geothermal map of the Caucasus (Sc. 1:1000000). Mingeo SSSR, NPO “Neftegeofizika”, YuzhVNIIGeofizika. Printed in plant No.11 PO “Azerbaidzhanaerogeodeziya” GUGK SSSR (chief editor Mekhtiyev Sh.F.), 1989 (in Russian).
Huseynov B.B., Ibadov F.I., Salmanov A.M., Aliyeva E.H-M., Maharramov B.I., Tagiyev M.F. Paleotectonic substantiation of the unconventinoal hydrocarbon potential of Maikop formation, Yevlakh-Aghjabedi trough. SOCAR Proceedings, No. 3, 2015, pp. 9-18 (in Russian).
Inan S., Namik Yalçın M., Guliyev I.S., Kuliev K., Feyzullayev A.A. Deep petroleum occurrences in the Lower Kura depression, South Caspian Basin, Azerbaijan: an organic geochemical and basin modeling study. Marine and petroleum geology, Vol. 14, No. 7-8, 1997, pp. 731-762.
Katz K., Richards D., Long D., Lawrence W. A new look at the components of the petroleum system of the South Caspian Basin. Journal of Petroleum Science and Engineering, Vol. 28, No. 4, 2000, pp. 161-182.
Klosterman M.J., Abrams M.A., Aleskerov E.A. et al. Hydrocarbon system of the Evlakh-Agdzhabedi depression, Azerbaijan geologist, No. 1, 1997, pp. 90-120.
Korchagina Yu.I., Guliev I.S., Zeinalova K.S. Oil and gas generating potential of deep-seated Mesozoic–Cenozoic sediments in the South Caspian Basin. In the coll. sci. papers “The issues of oil and gas presence in the Caucasus”. Nauka. Moscow, 1988, pp. 35-41 (in Russian).
Map of oil and gas fileds and prospective structures of the Azerbaijan SSR. (Sc. 1:500000) Minnefteprom SSSR, PO “Azneft”, (science editors Mekhtiyev Sh.F. and Bagirzade F.M.), 1984 (in Russian).
Miles J.A. Illustrated glossary of petroleum geochemistry. Oxford University press. USA, New York, 1989, 138 p.
Zhabrev D.V., Mehtiyev Sh.F. On bituminology of the Tertiary complex in the south-east of Azerbaijan. Publishing house of the USSR Acad.of Sci. Moscow, 1959, 112 p. (in Russian).