Nigeria’s Big Oil-Refining Revamp Gets Off to a Slow Start

A year after shutting down all of its dilapidated refineries to figure out how to fix them, Nigeria still can’t say how much it will cost to do the work or where the money will come from.

Nigerian National Petroleum Corp. said it has finished the appraisal of its largest facility, but hasn’t completed the process at two others. Refining experts said the extended halt means the plants are at risk of rotting away and unlikely to restart on time.