SOCAR stopped supplies to Russia's Black Sea port of Novorossiisk after planned maintenance on the Baku-Novorossiisk pipeline started on March 1, and cancelled the loading of two 80,000-tonne cargoes.
The company diverted crude flows to its own Baku-Tbilisi-Ceyhan pipeline after the suspension of transit via Russia.
Oil exports via Russia in January-September of this year totalled 489,600 tonnes.
SOCAR plans to ship 85,000 tonnes of crude oil via Russia in October and aims to transport through Baku-Novorossiisk 825,000 tonnes in total in 2019, a source at SOCAR told Reuters.
SOCAR shipped 1.299 million tonnes of oil via Russia in 2018, down from 1.576 million tonnes in 2017.
Azerbaijan sends only a small portion of its oil exports via Russia, using routes through Georgia and Turkey for the bulk of its crude shipments.
SOCAR's crude has a lower sulphur content than Russia's Urals blend. The company receives crude from Russian pipeline monopoly AK Transneft to fill its loading slots at the Novorossiisk oil terminal.