Source Rock Potential of the Eastern Drava Depression and Some Other Source Rock Localities in Croatia as Evaluated From Well Log Data

Abstract

The eastern part of the Drava depression is an area with extensive source rock distribution in the Miocene formation. Source rock maturity has been determined from the formation resistivity. The formation resistivity of 32 Ohm*m is typical of the area and it represents the threshold value between immature and mature source rocks. The data has been correlated with existing geochemical analyses.

Additional research has been undertaken at other localities (parts of the Drava and Sava depression and Middle Adriatic ridge). Various cross plots which have been obtained are useful for source rock determination from well logs, in very different p/T conditions and the lithologies which are characteristic for source rocks in Croatia.