BP halted production at its Thunder Horse rig in the Gulf of Mexico due to a power outage earlier this week, a news report said.
BP evacuated its crew of about 300 people from the platform as a precaution, the company told Reuters.
Technical and essential staff were expected to return yesterday, the report said.
The platform, which can produce up to 265,000 barrels of oil a day, was evacuated earlier this month in anticipation of Hurricane Irma.
The facility is understood to have avoided permanent structural damage.