Over 800,000 litres of crude oil from a tanker has been spilt at the Port of Brisbane at about 5pm yesterday afternoon.

Queensland Fire and Emergency Services have estimated it could take over a week to clean-up.

QFES Chief Superintendent Steve De Pinto told Peter Fegan on 4BC Breakfast, "It's not that common, but it does happen from time to time and the design of those facilities are designed in such a way to manage issues like this."

"There is some possibilities that are being explored, but there's no ship involved and this is a land-based tank."

"We've got some drone footage that shows a couple of possibilities, but look, I can't really speculate," Chief De Pinto said.

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