The US Environmental Safety and Enforcement Administration said about 24 percent of crude oil production and 18 percent of natural gas production in the US Gulf of Mexico was shut down due to Hurricane Helen.
Oil and natural gas production losses fell for a second day in a row after peaking at 511,000 barrels on Wednesday.
The agency said energy producers had halted production of 427,000 barrels per day of oil and about 343 million cubic feet of natural gas from Gulf waters.
Nine oil and gas platforms had been evacuated as of Friday, representing about 2.4 percent of the total Gulf of Mexico rigs, the U.S. Marine Regulatory Authority said, citing reports from producers.
Oil and gas producers began shutting down offshore production on Tuesday as Hurricane Helene moved through the U.S. Gulf of Mexico.
Chevron said Friday it had begun redeploying workers and restoring production at company-operated platforms in the wake of the storm.
The U.S. Gulf of Mexico accounts for about 15 percent of total domestic oil production and 2 percent of natural gas production, federal data showed.
