Geochemical significance of hydrocarbons desorbed from asphaltenes |
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| Authors: | Changchun Pan Zhongyao Xiao |
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| Institution: | (1) Guangzhou Institute of Geochemistry, 510640 Guangzhou, China;(2) Research Center of Tarim Petroleum Exploration and Development, 841000 Xinjiang, China |
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| Abstract: | Saturate hydrocarbon fractions desorbed (cleaned) from asphaltenes extracted and separated from two core samples (a tar sand
and a reservoir sandstone sample) were analyzed by gas chromatography-mass spectrometry (GC-MS). The results indicated thatn-alkanes adsorbed in asphaltenes were kept quite well during and after severe biodegradation over 360 Ma. Hydrocarbon desorption
could be an alternative method of, or even better than the pyrolysis of asphaltenes to reconstruct the hydrocarbon fingerprints
of primary oils and extend the understanding of the origins of hydrocarbon reservoirs.
Project supported by the Chinese Academy of Sciences, State Key Laboratory of Organic Geochemistry and Research Center of
Tarim Petroleum Exploration and Development. |
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| Keywords: | biodegradation hydrocarbon desorption from asphaltenes primary hydrocarbon components |
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