GC-AED Measurement for Organic Sulphur Compounds and Its Tentative Applications in petroleum Geology

Key words: 
• Organic sulphur compounds /
• Analytic technique /
• GC-AED /
• Oil-to-source correlation /
• Sedimentary environments

Abstract: Heterocyclic compounds (e. g., N,O,S compounds) have been arousing more and more attention in geochemical stydies. The conventional techniques for measurements of organic sulphur compounds are GC-MS and GC-FPD. But these are limited, at least to some degree, by specificity, sensitivity and co-elution. In the present study,GC-AED (Gas Chromatagraph with Atomatic Emission Detector) was applied to the measurement for organic sulphur compounds in oils from different sedimentary environments in China. The results show that the high specificity and sensitivitiy of the GC-AED make it advantageous in analyses for these heterocyclic compounds. There exists obvious difference in concentration and distribution of organic sulphur compounds among different sedimentary environments: Oils devived from marine carbonate often have a much more higher content of organic sulphur compounds than those from rocks of terrestrial fresh water and swamp depositional factes. This may be useful in oil-to-oil and oil-to-source correlations.