Petroleum inclusions and residual oils: constraints for deciphering petroleum migration |
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Authors: | H Volk U Mann O Burde B Horsfield V Suchý |
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Institution: | a Institute of Petroleum and Organic Geochemistry (ICG-4), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany;b Institute of Geology, Academy of Sciences of the Czech Republic, Prague, Czech Republic |
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Abstract: | The analysis of petroleum inclusions (PI) in parallel to residual oils (=bitumens) provided specific constraints for petroleum migration processes in the Prague Basin. Whereas organic geochemical information from bitumens is limited due to alteration, additional high quality information was obtained from C1–14-range compounds inside crystals. This was obtained by the application of a closed system for the decrepitation and thermal extraction of PI with subsequent gas chromatography (GC) and gas chromatography–mass spectrometry (GC–MS). The resulting data not only show pristine live oils, gases, residual and precipitated bitumens and a broad variation of mixtures of the groups above, but also show that gas migration and fractionation processes played a major role in the Prague Basin. |
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Keywords: | petroleum inclusions bitumens migration fractionation hydrocarbons Prague basin |
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