The Northern Territory Government will review its processes as the capital city suffers through more blackouts.

It appears that poor communication with the Italian firm that supplies gas to Darwin's power station may have been a factor in rolling blackouts late last week.

The Italy-based multinational ENI runs the Yelcherr gas plant; an unmanned platform about 50 metres underwater in the Blacktip gas field of the Joseph Bonaparte Gulf, 280 kilometres from Darwin.

The Yelcherr rig has a 25-year agreement to supply gas for NT utility provider Power Water Corporation's (PWC) electricity generators at Channel Island.

Last Thursday night, reports say a rolling blackout swept Darwin suburbs after the offshore platform shut down supply.

NT Chief Minister Adam Giles says a communication issue may have caused an automatic shutdown, and the Government will look to sure up the flow for the future.

“This isn't pointing the finger at ENI,” Mr Giles said.

“We need to look at communication processes and the elements within the contract and identify if we can do things better in the future.

“We believe we should be able to look at what occurred.”

It is understood that the review process will investigate whether ENI could have given warning about the supply problems earlier.

The NT’s Essential Services Minister Willem Westra van Holthe said PWC were only able to inform him of the supply problem at 1:15pm on the day of blackouts.

“The scheduling and contingencies worked as they should have - consumers were only out for an hour at a time,” Mr van Holthe said of the blackouts.

“I don't think anyone had more than one occasion they were out.

“Things went as well as they possibly could.

“We're hoping this does not happen again,” he said.

In a later interview with the ABC, Mr van Holthe elaborated on the communication breakdown.

“ENI had a problem out there with some electronics,” ha said.

“It was a communication issue between the well and onshore that necessitated the shutdown of the gas system automatically.

“In terms of the repairs that were done out at Blacktip, talk to ENI. They are in a much better position to say what happened out there.

“The advice I have is everything out on that platform is automated and there is no capacity for human interference,” he said.

ENI has issued a statement claiming supply has been restored to normal, and there has been no risk to personnel, or the integrity of its facilities and the environment.

In a separate issue, ENI’s newly appointed chief executive is being investigated over the purchase of a Nigerian oil asset.

ENI says prosecutors have placed Claudio Descalzi, a long time veteran of the company and CEO since May, under investigation over possible corruption in the acquisition of Nigerian offshore oil block OPL 245 in 2011.

ENI and Royal Dutch Shell bought OPL 245 by Eni for a total of $1.3 billion, after almost a decade of negotiations.

But the oil block was allocated at a time when the African country was under a military dictatorship.

The angered anti-corruption campaigners, who seek greater transparency in dealings of oil companies with resource-rich non-Western governments.

ENI is Italy's largest company by market capitalisation, and continues to claim it has done nothing wrong.