Crude Oil with a mixture formed in the system of pipeline Transneft by mixing heavy sour crude Ural from the Volga region and low-sulfur oil in Western Siberia, the relevant characteristics to the brand Urals.

Urals brand oil is supplied through the Baku-Novorossiysk pipeline system and the Druzhba pipeline.

Components of petroleum are separated using a technique called fractional distillation, i.e. separation of a liquid mixture into fractions differing in boiling point by means of distillation, typically using a fractionating column.

Petroleum includes not only crude oil, but all liquid, gaseous and solid hydrocarbons.