How it started
Soviet period
In 1949, Soviet authorities approved construction of an oil refinery near the city of Omsk. The refinery started operations on 6 September 1955, and began processing gasoline by 1959. It was subordinate to the Ministry of Oil Industry from 1951 to June 1957, then to the Omsk Sovnarkhoz's Oil Industry Directorate from July 1957 to 1962.
Feedstock from Bashkortostan was initially processed at Omsk. Feedstock from Siberia followed in 1964. Later feedstocks were delivered through the Ust-Balyk–Omsk pipeline.
Post-Soviet modernization
A unit commissioned in 1994 enabled the refinery to process heavy oil and to increase oil conversion rates to 85%.
As of 2021, the refinery could process 22 million tons of refined petroleum products per year and the capital invested to date in the plant was 60 billion rubles.
From Wikipedia’s article on Omsk refinery, shared under CC BY-SA 4.0.2