oa Organic Geochemical Characterization of Crude Oils from the “Pal” Oil Field (Se Pannonian Basin, Serbia)

The most important oil fields in Serbia are located in the northern part of the country and belong to the southeastern part of the Pannonian Basin. This area is divided by the river Tisza into the western region of Backa and the eastern Banat. Crude oils from the Banat were studied to a limited extent, while data on oils from the Backa region are largely missing. Therefore, oils from “PAL” oil field (near the Hungarian border) were investigated in this study to establish their origin, depositional environment, thermal maturity and age. The physico-chemical parameters, distributions of biomarkers and aromatic hydrocarbons, as well as carbon isotopes were used. The oils from the “PAL” oil field are similar and belong to the same genetic type. The precursor organic matter originates from mixed marine/terrestrial sources, with a dominance of the former, and was deposited under reducing conditions. The oils were generated from source rocks in the main stage of the oil window, corresponding to the vitrinite reflectance of 0.80–0.84%. According to the obtained results, it can be assumed that the studied oils derive from the Miocene source rocks located in the Szeged-Kiskunság Basin in south Hungary.