Allens acted for Origin during the transaction while Mallesons acted for the six Mandated Lead Arrangers.

Karen Moses, Origin's executive director finance and strategy, said "The facilities, which will be used to refinance Origin's maturing debt, have terms of between three and five years providing further flexibility as we continue to grow our business.

"The solid support that we received from domestic and international debt markets evidences the strength of our business and financial profile."

Mallesons Partner Richard Hayes said: "This deal shows the growing appetite in Asia for good corporate credits. It was a great result for Origin and the banks and provides strong support for Australia's thriving energy sector."