The Italian oil company Eni says it has agreed to lower production targets at a major oil field in Iraq's south while extending the length of the contract by five years.

Foreign oil companies have helped turn around Iraq's dilapidated oil industry in recent years, but export bottlenecks have forced Iraqi officials to rethink the pace of oil field development.

Eni says the deal signed Monday in Baghdad sets a new target at the Zubair field of 850,000 barrels of oil per day through 2035.

The 20-year deal it signed with Iraq in 2010 originally called for 1.2 million barrels of daily production.

Eni is the main contractor developing the 4.1 billion barrel Zubair field as part of a consortium that includes Los Angeles-based Occidental Petroleum and South Korea's KOGAS.