The effect of origin and genetic processes of low molecular weight aromatic hydrocarbons in petroleum on their stable carbon isotopic compositions
作者： P. Le Métayer , K. Grice , C.N. Chow , L. Caccetta , E. Maslen
DOI: 10.1016/J.ORGGEOCHEM.2014.04.008
关键词: Methane 、 Isotopes of carbon 、 δ13C 、 Fractionation 、 Maturity (geology) 、 Alkylbenzenes 、 Carbon 、 Diagenesis 、 Organic chemistry 、 Chemistry
摘要: Stable carbon isotopic compositions of individual low molecular weight aromatic hydrocarbons, such as alkylbenzenes, alkylnaphthalenes and alkylphenanthrenes, were measured from a set oils, mostly the North-West shelf Australia, varying age, facies type thermal maturity. The objective was to assess influence maturity source during generation these aromatics on their stable compositions. For most oils studied, δ13C components show 13C depletion degree methylation increases. alkylnaphthalenes, is pronounced for compared high oils. methyl groups calculated resulting data display significant differences between ‘mature’ ‘immature’ suggesting that isotopically lighter are ‘released’ maturation proceeds. Therefore, we propose an fractionation associated with transfer mechanisms affecting hydrocarbons diagenesis.
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