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- W2567386623 abstract "The complex geochemical characteristics of crude oils can provide important information on oil generation, such as the input of organic matter and their depositional environments, also supporting exploration, extraction, and production. This work reports the first organic geochemical evaluation of oils from the first commercial Brazilian onshore field (Carmópolis, Sergipe, Brazil) via both classical biomarkers and petroleomics data collected via ultrahigh-resolution and accuracy Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Gas chromatography/mass spectrometry (GC/MS) was used to characterize the oil composition in terms of n-alkane, isoprenoid, terpane, and sterane biomarkers, whereas either positive or negative electrospray ionization (ESI) and FT-ICR were used to profile the polar constituents of the oils. GC/MS revealed geochemical characteristics that classify the oil at different levels of thermal evolution and biodegradation. FT-ICR MS attributed molecular formulas to more than 3000 polar oil constituents, allowing geochemical parameters to be inferred mainly from the carbon number (Cn) and double bond equivalent (DBE) trends, along with the N and O2 classes. The Dia27(S + R)/αααC27(S + R), % C28, and % C29 parameters and S/(S + R)αααC29, αββ(S + R)/αββ + ααα(S + R)C29, and % C27 biomarkers obtained from GC/MS were responsible to indicate similarity between samples, whereas N and O2 classes provided the most distinction among the crude oil blends in terms of the level of biodegradation and thermal maturity." @default.
- W2567386623 created "2017-01-06" @default.
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- W2567386623 date "2017-01-20" @default.
- W2567386623 modified "2023-10-01" @default.
- W2567386623 title "Advanced Aspects of Crude Oils Correlating Data of Classical Biomarkers and Mass Spectrometry Petroleomics" @default.
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- W2567386623 doi "https://doi.org/10.1021/acs.energyfuels.6b02362" @default.
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