Home > Archive > No. 2 (179) 2019 > 47-54
Geology & Geochemistry of Combustible Minerals No. 2 (179) 2019, 47-54.
Ihor KUROVETS, Oleksandr PRYKHODKO, Ihor HRYTSYK, Svitlana MELNYCHUK
Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, e-mail: igggk@mail.lviv.ua
Abstract
The formation of the temperature regime of the Dnieper-Donets depression is determined by the magnitude of the deep heat flux, the structural and tectonic features of the region, the lithology of the sedimentary complex, the occurrence of a thick complex of chemogenic and volcanic rocks in the region, as well as hydrogeological conditions.
Based on the analysis of factual geothermal material on wells, obtained during geophysical studies, measurements of temperatures and geothermal gradients, measurements of temperatures during testing of productive horizons, as well as from literary sources, the interpolation of factual geothermal material is carried out. The geothermal parameters characterizing the temperature state of rocks and fluids of different tectonic zones of the Eastern oil- and gas-bearing region have been determined. Schemes of temperature distribution at depths of 2000, 8000 m, average geothermal gradient, depths of isotherms 150 °C, 180 °C are given and regularities of distribution of geothermal parameters are analyzed. The lateral zoning of the geothermal parameters distribution of the region is established, the zones of their maximum, middle and low values are distinguished. Taking into account the peculiarities of the tectonic structure of the Dnieper-Donets graben, as the sedimentary complex is submerged, a gradual replacement of oil by oil and gas fields and then by the gas ones occurs from the northwest to the southeast. Geothermal parameters characterize the geothermal activity of the subsurface and allow to determine its zonation, as well as to predict the phase state of hydrocarbon systems at great depths.
Keywords
geothermal parameters, thermobaric conditions, average geothermal gradient, “background” regional temperatures, isothermal surface, hydrocarbon phase state, Eastern oil- and gas-bearing region.
REFERENCES
Atlas rodovyshch nafty i hazu Ukrainy (T. 1. Skhidnyi naftohazonosnyi rehion) [Atlas of oil and gas fields of Ukraine (Vol. 1. Eastern oil-gas region)]. (1998). Lviv: UOHA. [in Ukrainian]
Hrytsyk, I. I., Kolodiy, V. V., Osadchyi, V. G., Prykhodko, O. A., & Putsylo, V. I. (1999). Heotermichnyi rezhym Dniprovsko-Donetskoi zapadyny na hlybyni ponad 5 km [Geothermal regime of the Dnieper-Donets Depression at a depth over 5 km]. Sbornik nauchnykh trudov NGA Ukrainy [Scientific collected articles of National Mining Academy], 6 (T. 1. Geologiya poleznykh iskopaemykh [Vol. 1. Geology of useful minerals]), 36–39. [in Ukrainian]
Hrytsyk, I. I., Osadchyi, V. G., & Prykhodko, O. A. (1998). Karta rozpodilu rehionalnykh fonovykh temperatur Dniprovsko-Donetskoi zapadyny na hlybyni 2000 m [Map of distribution of background temperatures at a depth of 2000 m]. In Materialy V Mizhnarodnoi konferentsii “Nafta–haz Ukrainy–98” (Poltava, 15–17 veresnia 1998 r.) [Proceedings of the International conference “Oil-gas of Ukraine–98” (Poltava, September 15–17, 1998)] (Vol. 1, p. 153). Poltava. [in Ukrainian]
Kolodiy, V. V., & Prykhodko, A. A. (1989). Geotermicheskaya zonal’nost’ i raspredelenie zalezhei UV na severo-zapade DDV [Geothermal zonality and distribution of hydrocarbon deposits in the north-west of the Dnieper-Donets Depression]. Neftyanaya i gazovaya promyshlennost‘ [Oil and Gas Industry], 1, 12–14. [in Russian]
Prykhodko, A., & Lourie, A. (1998). Geothermic field, oil and gas content of the Dnieper-Donets cavity. In Proceedings of the International conference: The Earth’s thermal field and related research methods (Moscow, Russia, May 19–21, 1998) (pp. 220–221). Moscow.
Prykhodko, O. A., Osadchyi, V. G., & Kurovets, I. M. (2005). Termobarychni umovyny produktyvnykh horyzontiv rodovyshch vuhlevodniv pivnichno-zakhidnoi chastyny Dniprovsko-Donetskoi zapadyny [Thermobaric conditions of productive horizons of hydrocarbon fields of the north-western part of the Dnieper-Donets Depression]. Heolohiia i heokhimiia horiuchykh kopalyn [Geology and Geochemistry of Combustible Minerals], 3–4, 5–12. [in Ukrainian]