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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.18, No.3, pp. 289-308, 1995

┬ęCopyright 2000 Scientific Press, Ltd.

GEOCHEMICAL CHARACTERIZATION AND RELATIONSHIP
OF OILS AND SOLID BITUMENS FROM SE TURKEY

E. Mueller*, R.P. Philp* and J. Allen*

* School of Geology and Geophysics, University of Oklahoma, Norman, OK 73019, USA.


Abstract

Solid bitumens from the Seridhali vein, occurring in the Upper Cretaceous--Palaeocene Germav Formation, and five oils from different oilfields in SE Turkey, were investigated by a variety of organic geochemical methods. Based on biomarker distributions (pristane/ phytane, carbon number preference (CPI), norhopane/hopane, extended hopane distribution, pregnanes/regular steranes), a marine carbonate depositional environment is inferred for the source of these oils. The oils are "early mature", as indicated by their ethylcholestane 20S/20S+20R ratios, and the 17 alpha (H), 21 Previous HitbetaTop (H)-bishomohopane 22S/22S+22R ratios. Differences in relative abundance of some compounds typical of higher salinities in the depositional environment (docosane, pregnane) suggest different sources or facies variations within a common source. No aromatic sulfur compounds were detected in the oils.

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