Molecular fossil characteristics of crude oils from Libyan oilfields in the Zalla trough

Abstract EN

The main aim of this study is to determine the organic geochemistry of the two crude oils samples recovered from Zalla Trough oilfields to assess oil characterization, Maturation and source depositional environments.

The organic geochemical analyses were determined by gas chromatography and gas chromatography/mass spectrometry.

n-alkanes distribution, Pristane/phytane, isoprenoids/n-alkanes, CPI, homohopanes abudance, diasteranes, Ster/hop, C29 20S/20S+20R and C29/C30 hopane were evaluated and determined.

The results suggest that all of the oils are belonged to source rocks rich in marine organic matter deposited under suboxic saline and siliciclastic conditions and are characterized by high level of maturation and sourced mainly from organic matters of marine origin.