Washington Post summary and NY Times' take. Focus is on Kurdish concerns about the bill.

Wash Post:
Oil Minister Hussein al-Shahristani told reporters in Saudi Arabia that he believed the legislation would be passed by the end of the month. But some Iraqi parliament members expect a more protracted struggle, as Sunnis, Shiites and Kurds vie for shares of revenue from the world's third-largest oil reserves.

The prime minister of the Kurdistan Regional Government, Nechirvan Barzani, told Prime Minister Nouri al-Maliki that Kurds would not accept the oil law unless a piece of companion legislation, and accompanying annexes detailing revenue distribution, were amended. The changes would allow the Kurds greater concessions in developing oil fields in their territory, according to Mahmoud Othman, a Kurdish legislator. Kurds are unhappy with the percentage of underground oil resources that would be controlled by the Iraqi National Oil Company, effectively putting the resources under national, rather than regional, jurisdiction.
NYTIMES:
...

In Iraq, the Kurds have taken issue with a new provision that was quietly packaged with the draft oil law by the Shiite-led Oil Ministry last month. The measure would essentially cede control of the management of nearly all known oil fields and related contracts to a state-run oil company to be established after passage of the law, said a spokesman for the Kurdish regional government.

The spokesman, Khalid Salih, said the provision violated a clause in the Constitution that says the central government must work with regional governments to determine management of known fields that have not been developed. The Kurds, who have enjoyed de facto independence in the north since 1991, have been arguing for maximum regional control over oil contracts.

The provision is part of four so-called annexes that are to be debated with the draft oil law in Parliament. Any objection to one or more of the annexes will stall passage of the law.

...

The Kurds held up cabinet approval of the draft law for months, seeking to ensure that it guaranteed maximum regional autonomy to sign oil contracts. They fear that the central government might steer exploration and development contracts toward the Shiite-dominated south, at the expense of other regions.

The Kurds recently discovered two fields in northern Iraq, after signing contracts with a Norwegian and a Turkish company. But on Wednesday the Iraqi oil minister, Hussain al-Shahristani, a Shiite, said at a conference in Saudi Arabia that any contracts signed by the Kurds before passage of the oil law were considered invalid and illegal, news agencies reported.

In Erbil, Mr. Salih, the Kurdish spokesman, said the Kurdish contracts were legal and “had been prepared according to international standards and norms.”