Almost 13% of oil production in the US Gulf of Mexico was still shut in as of Friday, the Bureau of Safety and Environmental Enforcement (BSEE) said.
Production at numerous offshore platforms and rigs had been shut in because of the approach of Hurricane Nate, which made landfall in Louisiana and then in Mississippi back on October 8.
BSEE, an agency that comes under the Department of the Interior (DOI), said that operator reports show 12.6% of oil output in the US Gulf remained shut in. That equates to 220,466 barrels per day.
It also said that while most evacuated workers have returned to their production platforms, 13 of 737 manned platforms remain evacuated.
Among the oil companies to have resumed normal operations is San Ramon, California-based Chevron, which announced its full return.
Natural gas output is also shy of pre-Nate levels, with Gulf production down 7.39%, equivalent to 237.92 million cubic feet per day.