Published April 2012
Hydrocarbon composition of oils of Azeri, Chirag, Guneshli fields
F. I. SamadovaThe article provides the results achieved from comparative study of hydrocarbon composition of narrow fractions and vacuum residues of oils of Azeri, Chirag, Guneshli offshore fields. 50 oC fractions (150-450 oC) and vacuum residues (450 oC) obtained from oils have been divided into naphten-paraffin, aromatic and tar combinations through liquid-chromatographic adsorption (ГОСТ 11244-86) method, through solvents in order to study the composition of hydrocarbons. Parameters of common molecules (distribution of hydrogen in molecules) of naphten-paraffin, aromatic hydrocarbons and tar combinations obtained from division of vacuum residues of oils with assistance of nuclear-magnetic resonance (NMR) spectroscopy analysis method have been defined. It was defined that general distillate fractions of oils have similar compositions; here amount of saturated naphten-paraffin hydrocarbons is three times higher than aromatic hydrocarbons. Naphten fragments prevail in multi annulus aromatic hydrocarbons and resinous combinations with hybrid structure decomposed from vacuum residues. Results obtained show that studied oils are genetically linked with each other and other oils extracted from both onshore and offshore fields.
