Features of chemical composition of crudes from azerbaidzhan offshore fields

Two offshore fields, the April 28 field and the Darwin Bank field are analyzed for their oils. The oil occurs at different depths and so they differ in physicochemical properties. These properties are presented, and the authors perform a more detailed study of the composition and properties by separating these crudes into 50 degree cuts. The cuts from the Darwin Bank crude are higher in density, refractive index, and molecular weight. The cuts from the April 28 crude show alkylbenzenes predominate. The ash from the Darwin Bank crude contains such trace elements as nickel, magnesium, and titanium in considerably greater amounts than in the ash from the April 28 crude.