High-sulfur crude oils of Ulyanovsk Oblast

The authors summarize the physicochemical characteristics of crude oils taken from various horizons in the Birlinsk, Pravdinsk, and bezymyannoe fields in Ulyanovsk Oblast. These crudes are heavy, medium-wax, high-sulfur, high-resin. Paraffinic hydrocarbons are shown to predominate in the narrow naphtha cuts.