Iraq, OPEC's second largest oil producer, exports the bulk of its oil through its southern Gulf port of Basra.
An Iraqi oil ministry official with knowledge of the meeting said the aim was to reassure the companies that their deals with the Kurdistan Regional Government (KRG) were secure.
Baghdad and the KRG signed a temporary agreement on Tuesday to restart northern oil exports as part of efforts to end decades of political and economic disputes.
Petraco confirmed its presence at talks in Baghdad and said it was currently awaiting further developments.
Further complicating the picture, Kurdistan has borrowed billions of dollars from trading houses and oil producers, including to build a new pipeline to Turkey, pledging to repay debts from future oil exports.