The Nigerian National Petroleum Corporation (NNPC) has resumed operations at its Port Harcourt, Warri and Kaduna oil refineries.
The refineries were closed in December, mainly because of disruptions to crude supply caused by damage to key pipelines.
The Port Harcourt refinery restarted on 28 January and the Warri and Kaduna refineries restarted operations on 31 January.
Nigeria relies on imports for its gasoline and middle distillate requirements. The country has nominal refining capacity of 445,000 b/d.