Application of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) to evaluate impact of rock heterogeneities on hydrocarbon distribution in deltaic reservoir sandstones
Hydrocarbon functional groups distribution have been analyzed on 1*1cm grid on sample surfaces using ATR-FTIR spectroscopy to determine hydrocarbon bond type variation and factors controlling it. Micropermeability measurements have been carried out to determine relationship between absorbance of...
| Main Authors: | , |
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| Format: | Journal Article |
| Published: |
Slovnaft VÚRUP
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/60516 |
| Summary: | Hydrocarbon functional groups distribution have been analyzed on 1*1cm grid on sample surfaces
using ATR-FTIR spectroscopy to determine hydrocarbon bond type variation and factors controlling it.
Micropermeability measurements have been carried out to determine relationship between absorbance
of hydrocarbon functional groups and permeability. The main hydrocarbon functional groups
recorded in the samples are the aliphatic C-H and aromatic C=C-C bonds. The aromatic functional
groups are more concentrated in the silt-dominated laminations of the laminated sandstones and
burrows in the bioturbated sandstones compared to the sand-dominated laminations and nonburrowed
zones respectively. Textural, structural and bioturbation induced heterogeneities that
influence pore size and permeability distribution in the samples is found to be the main factor controlling
distribution of hydrocarbon bonds. In samples that lack any form of macro scale heterogeneities,
hydrocarbon and permeability distribution are found to be random. High permeability
generally correlates negatively with absorbance of hydrocarbon bonds and vice versa. |
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