AN investigation is underway after a contractor working on Esso's Kingfish B platform was injured on Monday.
An Australian Workers Union spokesperson said the worker was changing a pump when he sustained a small flash burn to his arm.
He was initially treated on site before being flown off for more medical treatment.
An Esso spokesperson confirmed a "small fire" occurred on its Kingfish B platform in Bass Strait, which he said was quickly extinguished.
"We are supporting the injured crew member and their family and our team on Kingfish B," the spokesperson said, adding the injured worker had been released from hospital.
"The platform has been made safe and all work activities have been put on hold until we have assessed it is safe to recommence."
A spokesperson for the industry regulator, NOPSEMA (the National Offshore Petroleum Safety and Environmental Management Authority), said it received a notification on Monday regarding a "flash fire" that occurred on the deck of the Kingfish B facility.
"We understand a worker has suffered burns and was transferred off the facility by medivac," the spokesperson said.
"The facility remains operational. "We are unable to comment further while the investigation is underway."
NOPSEMA inspectors were on site on Wednesday. The injured worker is expected to make a full recovery.