Advertisement

Chinese Journal of Geochemistry

, Volume 13, Issue 2, pp 97–106 | Cite as

Characteristics of aromatic hydrocarbons in crude oils

  • Luo Binjie
  • Li Xinyu
Article

Abstract

Crude oils from different basins in China, Australia and New Zealand were analyzed to character ize aromatic hydrocarbons produced in different environments by means of GC/MS. The distributions of some common compounds such as naphthalene, phenanthrene, ehrysene, pyrene, fluoranthene, fluorene, dibenzothiophene and dibenzofuran were found to be related to sedimentary environments. Especially the relative contents of fluorenes, dibenzofurans and dibenzothiophenes can be used to divide the oils into three types: (1) saline or marine carbonate environment; (2 ) fresh-brackish water lake; (3) swamp and coal-bearing sequence.

Aromatic biomarkers (e.g. retene, nor-abietene, derivatives of lupeol and β-amyrin) represent higher plant inputs with respect to the precursors of crude oils. High contents of sulphur-containing compounds like benzothiophene and dibenzothiophene series indicate a reducing sulphur-abundant diagenetic condition. The benzohopane series (C32–C35) was identified both in hypersaline and coal-bearing basins, and it is postulated to be the result of strong bacteria activity. In all the samples, a complete series of alkyl benzenes was analyzed. The similarity of its carbon-number distribution with that of n-alkanes probably suggests their genetic relationship.

The distribution of the methylphenanthrene series reflects the evolution degree of crude oils, MPI holding a positive correlation with C29-sterane 20S/(20S+20R).

Key words

aromatic compound depositional environment precursor input hypersaline basin MPI 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Brasseil, S.C., C. A. Lewis et al., 1986, Isoprenoid thiophenes, novel products of sediment diagenesis: Nature, v. 320, p. 160–162.CrossRefGoogle Scholar
  2. Fu Jiamo et al., 1987, Organic geochemical characteristics of sphagnum brown coal —a possible oil-generating precursor: Geochimica, n.l, p. 1–9 (in Chinese with English abstract).Google Scholar
  3. Ingram, L. L. and J. Ellis, 1983, Comparative study of oil shales and shale oils from the Mahogany Zone, Green River Formation (USA) and Kerosene Greek seam, Rundle Formation (Australia): Chem. Geol., v. 38, p. 185–212.CrossRefGoogle Scholar
  4. Lalonde, R.T., 1987. Low-temperature, polysulfide reactions of conjugated ene carbonyls, a reaction model for the geologic origin of S-heterocycles: Org. Geochem., v. 11, p. 563–571.CrossRefGoogle Scholar
  5. Luo Binjie, Wang Youxiao and Yang Xinghua. 1981, Accumulation, evolution and oil-generation of terrestrial organic matter: Papers of Lanzhou Institute of Geology, Chinese Academy of Sciences, n.l, p. 1–63 (in Chinese).Google Scholar
  6. Luo Binjie, Wang Guangyu, Li Xinyu and Zhang Ziyan, 1986. The discovery of benzohopane-series biomarkers and their geochemical implications: Acta Sedimentologica Sinica, v. 4, p. 125–129 (in Chinese with English abstract).Google Scholar
  7. Luo Binjie, Li Xinyu. Yang Xinghua et al., 1989, General geochemical characteristics of New Zealand crude oils: Acta Sedimentologica Sinica, v. 7. p. 29–37 (in Chinese with English abstract).Google Scholar
  8. Philp, R. P., 1985, Fossil fuel biomarkers, application and spectra: Amsterdam, Elsevier.Google Scholar
  9. Radke, M. and D.H. Welt, 1982, Geochemical study on a well in the Western Canada Basin, relation of the aromatic distribution pattern to maturity of organic matter: Geochim. et Cosmochim. Acta, v. 46, p. 1–10.CrossRefGoogle Scholar
  10. Radke, M., H. Welt, and H. Willsch, 1986, Maturity parameters based on aromatic hydrocarbons, influence of the organic matter type: Org. Geochem., v. 10, p. 51–63.CrossRefGoogle Scholar
  11. Figby, D. et al., 1986, The synthesis of alkyl aromatic hydrocarbons and its geochemical implications: Org. Geochem., v. 9, p. 255–264.CrossRefGoogle Scholar
  12. Sheng Guoying et al., 1986, Long-chain alkylthiophenes in high-sulfur crude oils from hypersaline basins: Geochimica, n.2. p. 138–145 (in Chinese with English abstract).Google Scholar
  13. Simoneit, B.R.T. et al., 1986, Cyclic terpenoids of contemporary resinous plant detritus and of fossil woods, ambers and coals, Advances in Org. Geochem., 1985: Org. Geochem., v. 10, p. 877–889.CrossRefGoogle Scholar
  14. Spyckrelle, C. H. et al., 1979, Aromatic hydrocarbon from geological sources. Part-III, A tetrahydro-chrysene derived from triterpenes in recent and old sediments: J. Chem. Res (S), 330-331 (M), p. 3746–3777.Google Scholar
  15. Vassilaros, D.L., W. S. Pikin, and W. L. Sorensen, 1979, In trace organic analysis. A new frontier in analytical chemistry: NBS Spec. Publ., Washington. D.C., U.S.Government Printing Office, v.519, p. 731.Google Scholar
  16. Zofla Czochanska et al., 1986, Organic geochemistry of sediments in New Zealand, Part I. A biomaker study of the petroleum seepage at the geothermal region of Waiotapu: Geochimica et Cosmochimica Acta, v. 50, p. 507–515.CrossRefGoogle Scholar

Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 1994

Authors and Affiliations

  • Luo Binjie
    • 1
  • Li Xinyu
    • 1
  1. 1.Chinese Academy of SciencesLanzhou Institute of GeologyLanzhou

Personalised recommendations