Geochemical characteristics and significance of aromatic hydrocarbons in crude oil from the East Fukang Sag, Junggar Basin, NW China

The aromatic compounds of twenty crude oil samples from different formations in the East Fukang Sag were studied by gas chromatography–mass spectrometry technique. Through analysis composition main hydrocarbons, generally divided into two types: Oil type I had relatively high content naphthalene series, biphenyl series and dibenzofuran while II contained abundance phenanthrene fluorene triaromatic steroid obvious methyltrimethyltridecylchromans. geochemical parameters reflecting source sedimentary environment three-fluorene systematically analyzed. Analysis results showed that continental origin deposited a weakly oxidizing to reducing with fresh-brackish water. was characterized considerably abundant terrestrial higher plant organic matter inputs, typical obviously lower aquatic organisms. Maturity-related calculated alkyl naphthalenes, phenanthrenes, dibenzothiophenes, methyltrimethyltridecylchromans all have reached mature stage.