松辽盆地西部图牧吉油砂地球化学特征

doi:10.11743/ogg20150407

Abstract

Abstract:

Being one of the important unconventional oil resources, oil sand is well worth of geochemical study so as to better guide its resource assessment.Thirteen oil sand samples were collected from Tumuji ranch in western Songliao Basin and analyzed for oil yield, bulk composition and GC-MS.The result shows that the oil yield of oil sand is high, and non-hydrocarbon components dominate the bulk composition.Most compounds in saturated and aromatic hydrocarbon fractions were largely biodegraded.The n-alkanes, isoprenoid alkanes, hopanes and steranes were all degraded in varying degree except for tricyclic terpanes.No 25-norhopane series has been detected in the studied sample suite. The naphthalene and phenanthrene series were all destroyed but the triaromatic steroids are intact.These oils are derived from single source rock system on the basis of biodegradation resistant compound signatures.

Key words: biodegradation, petroleum geochemistry, unconventional oil resource, oil sand, Tumuji, Songliao Basin

CLC Number:

TE122.1

Li Ningxi, Huang Haiping, Sun Jingjing, Liu Mei, Zhang Haifeng, Jiang Wenlong. Geochemical characteristics of Tumuji oil sands in western Songliao Basin[J]. Oil & Gas Geology, 2015, 36(4): 581-586.

References

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Geochemical characteristics of Tumuji oil sands in western Songliao Basin

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