Organic geochemical appraisal of hydrocarbon potential in the Danube Basin, Slovakia
Authors: Milicka J., Pereszlenyi M., Francu J., Vitalos R.
Publication: Oil and gas in Alpidic Thrustbelts and Basins of Central and Eastern Europe (special publication of EAGE) (431-439)
Published: 1996 (Geological Society, London)
Link: Geological Society
The Danube Basin is a northern marginal part of the Pannonian Basin formed in the last phase of the West Carpathian thrusting. The thickness of Neogene sedimentary basin fill in the deepest part of the central depression exceeds 6000 m. Central West Carpathian units form the pre-Tertiary basement to the north. Acid to intermediate volcanism was active during the Miocene. At a depth of 3000 m the temperature is about 133 °C in the central part and 110 °C in the northern margin of the basin. Soruce rock quality and maturity down to a depth of 3.5 km is characterized using Rock-Eval pyrolysis, mocrophotometry and, in selected samples, also by n-alkane, sterane and triterpane distribution. Basin modeling, calibrated by organic maturity indicators in selected boreholes suggests the beginning of hydrocarbon generation in the Neogene at depths over 3000 m in the northern area, and over 2600 m in the central part of the basin. Simulation of maturation history in deeper undrilled parts of the basin is based on heat-flow distribution, expected lithology and types of kerogen. The hydrocarbon potential of the Danube Basin is compared with the East Slovakian and Vienna basins.
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