Structural Study of Asphaltenes from the Sarvak Oil Reservoir

Asphaltene is the heaviest fraction of crude oil which is always considered as a menace in petroleum industry. Recent researches indicate that assessment of asphaltene structure results in better understanding about precipitation behavior of them. In this paper, two Iranian dead oils belong to Sarvak Formation were selected. After asphaltene precipitation, three tests of X-ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and Energy-dispersive X-ray spectroscopy (EDX-MAP) were done. Final results show that asphaltene Hendijan possesses larger structure than asphaltene SirriD. Moreover, asphaltene Hendijan has the biggest values of aromaticity and polarity. Larger structure, as well as more aromaticity and polarity causes to faster and more precipitation, so it can be concluded that asphaltene of Hendijan sample has more risk of precipitatiom than the other asphaltene.