There were 26 crew members on "Platform Habitat" who safely evacuated, authorities said. Two crew members reportedly had very minor injuries.
The fire was first reported just after 7 a.m.
There is no oil on the platform, and instead, it's all natural gas. A 1,000-yard safety zone was set up around the platform in response to the fire.
The U.S. Coast Guard said the fire was under control by 1:30 p.m., and personnel were being transferred back to the platform to conduct safety work.
It's unknown what caused the fire. The investigation is ongoing.