Authorities said the fire was put out on Thursday morning.
Following are some facts about export-oriented Tuapse oil refinery:
* The plant is the only large oil refinery in Russia located on the shores of the Black Sea. It is one of the country's oldest, and was constructed in 1929.
* The refinery has undergone multiple upgrades. In 2013 Russian President Vladimir Putin oversaw commissioning of a new primary crude oil processing unit.
* Plant's annual capacity stands at 12 million metric tons (240,000 barrels per day).
* Tuapse supplies fuel mainly to Turkey, China, Malaysia and Singapore. It produces naphtha, fuel oil, vacuum gasoil and high-sulphur diesel.
(Reporting by Vladimir Soldatkin)