OPEC oil ministers' meeting overshadowed by Iran-Saudi rivalry, oversupply of crude
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OPEC faces new challenges as its members gather for a ministerial meeting this week on how much crude to pump.
The group's 12 oil ministers are expected to stick to the organization's present output target of 30 million barrels a day at their Friday meeting.
But other issues confronting the Organization of the Petroleum Exporting Countries are more complex.
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Crude production is surging in the United States, its traditional main market. Already frayed OPEC unity stands to further suffer as a result of fears among some members of less dependency on its product.
A rivalry between Iran and Saudi Arabia is also denting OPEC's image as a unified controller of oil prices and supply.