Abstract
Oil-oil correlation is made for two oils from the Žutica field, Pannonian Basin: for the oil collected in the fractured shale (Žu-d) and for the oil in the Iva sandstone (Žu-sh). In order to study the oils, a multiple parameters approach is applied including comparison of the physical and chemical characteristics of whole crude oils and three fractions distinguished according to boiling ranges, namely up to 200°C (F1), between 200 and 300°C (F2) and above 300°C (F3). F3 is separated into asphaltenes and maltenes, which are separated into saturates, monoaromatics, diaromatics, polyaromatics and polar constituents. General physical properties, elemental composition, 13C/ 12C and D/H isotope ratios, biomarkers distribution, some specific compounds ratios and functional groups of the oils and/or fractions and subfractions are determined and compared. According to the difference in general physical properties, in isotope ratios and in structure and composition of heavier and more polar constitutive parts, the oils examined, although in the same oil field, are found to differ. Regarding the similarity in terpane and sterane biomarkers distribution, the oils seem to have similar organic precursors and similar maturity level.
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