Iraq wants to offer Nassiriyah oil field to international oil companies in a package deal that would include building a nearby refinery, a senior Iraqi oil official said Tuesday.

"We have decided that it would be one-package deal, developing the field and building a nearby refinery," Abdul Mahdy al-Ameedi, head of the Iraqi Oil Ministry's Petroleum Contracts and Licensing Directorate, told Dow Jones Newswires.

Ameedi also said the ministry may hold a "smaller" bidding round for Nassiriyah, in southern
Iraq , which holds some 4.4 billion barrels in reserves.

"For the bid round, we could invite companies which carried out studies on the field including a
Japan 's Nippon [Oil Corp., which has since become JX Nippon Oil & Energy Corp.], Italy 's Eni SpA (E) Spain 's Repsol YPF SA (REP) and U.S. 's Chevron Corp. (CVX)," Ameedi said.