A gas leak at the Elgin platform, 150 miles off the coast of Aberdeen has been ongoing since Sunday.
238 workers have been evacuated from the platform and the nearby Rowan Viking drilling rig as well as Shell have moved personnel. A three mile safety zone had been put in place but it has been increased to a five mile radius by the Unite union.
Greenpeace are concerned with possible wider implications of the gas leak in the North Sea.
Total Oil Company owns the platform and claim the leak has not been caused by human error. The company believe the leak is coming from a rock formation above the main reservoir, at a depth of 4,000m.
It has been regarded too dangerous for anyone to return to extinush the blaze but the company claim there is no danger of the flare igniting the gas cloud beneath the rig.
Total has been evaluating the sitution by fly-overs in the area and are currently considering drilling a relief well which could take months.