Two Emirati energy companies producing natural gas in Iraq's Kurdish region say they have boosted output to the equivalent of 80,000 barrels of oil a day.

Dana Gas and Crescent Petroleum said Sunday that production after four years of operation stands at 340 million cubic feet of gas a day and 15,000 barrels a day of condensed liquid gas.

They said the natural gas feeds local power stations that generate 1,750 megawatts of electricity for 4 million people in the three-province region.

The companies said that as of September, they have invested $975 million to develop natural gas production in the Kurdish region since 2007.

The Kurdish section of northern Iraq has its own semi-autonomous government.