Abstract
A direct method for crude oil evaluation based on spectral techniques is demonstrated in this article. This method is demonstrated for four crude oils from the El-Faras and Raml oil fields in the North Western Desert in Abu Gharadeg Basin, Egypt. The crude oils have been studied by 13C nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. Several parameters calculated from the 13C NMR and FTIR spectra provide useful information about the maturity of the organic matter in term of relative aliphatic, aromatic, and carbonyl/carboxyl concentrations; aliphatic chain length; and type and degree of substitution of aromatic structures. These spectra techniques may provide valuable information about the aromaticity and diverse functionalities that are important to the thermal history of the crude oil samples. Results showed that the composition of crude oil samples have higher aliphatic compounds than that of the aromatic compounds.
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