Abu Dhabi National Energy Company, the state-controlled energy investor, is returning to international bond markets for the first time since 2014 to help it refinance debt due in October.

The company known as Taqa is offering five-year bonds at a range of 262.5 to 275 basis points over the midswap rate, while the spread for 10-year bonds is ranging between 312.5 and 325 basis points, according to a person familiar with the deal.

Each tranche will have the size of $500 million, the person told Bloomberg.

The Abu Dhabi-based company, which last tapped the dollar market two years ago when it raised $750 million, has a $1 billion bond maturing in October, according to data compiled by Bloomberg.

It potentially joins a number of borrowers from the from the six-nation Gulf Cooperation Council that helped raise bond sales to $33 billion, a record for the period.

Qatar, the world’s biggest exporter of liquefied natural gas, raised $9 billion last month in the region’s biggest bond sale and Abu Dhabi in April raised $5 billion in its first offering in seven years.

BNP Paribas, Citigroup, First Gulf Bank, HSBC Holdings, National Bank of Abu Dhabi and Societe Generale SA are managing Taqa’s bond sale.-Bloomberg