Authorities have said the blaze erupted Friday morning while workers were using a torch to cut an oil line on the platform.
Pregeant's statement, however, said the cause of the fire and explosion is unknown and that "initial reports that a welding torch was being used at the time of the incident or that an incorrect line was cut are completely inaccurate."
A man who answered the phone at the company's Galliano, La., office on Sunday said the company had no comment.
Separate from the explosion, Grand Isle Shipyard is facing a lawsuit by a group of former workers from the Philippines who claim they were confined to cramped living quarters and forced to work long hours for substandard pay. The lawsuit was filed in late 2011 in a Louisiana federal court and is pending. Lawyers for the company have said the workers' claims are false and should be dismissed.
The workers recently obtained conditional class certification for allegations that Grand Isle Shipyard didn't pay them properly for overtime and may have violated other fair-labor standards, said attorney Joseph C. Peiffer. He said a notice will go out soon to let other workers know they might be able to join the lawsuit.
He said he was not representing the injured workers, but didn't rule out the possibility that he might do so.
Meanwhile, Black Elk said no oil was leaking from the charred platform, which hadn't been operating since August.
Black Elk Energy is an independent oil and gas company. The company's website says it holds interests in properties in Texas and Louisiana waters, including 854 wells on 155 platforms.