Mexico Racing Against Time at Cantarell Oil Field

MEXICO CITY (Reuters) - Mexico's state energy company Pemex is scrambling to extract what oil it can from its key Cantarell deposit as growing water and natural gas levels in the giant field depress yields of crude.

Cantarell produced more than 2 million barrels per day as recently as 2004, but yield has plunged as the aging field enters its natural decline phase, sending Mexican oil production tumbling to its lowest level since the mid-1990s.

The giant offshore Akal field and several nearby deposits that Pemex groups as Cantarell produced only 713,000 bpd in April, below Pemex's forecast of 756,000 bpd for 2009. Yields from the area have fallen at annualized rates of more than 35 percent in recent months.

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The deficit in Mexico, while less than half the gap in neighboring U.S. as a percentage of GDP, is more of a concern because 37 percent of the budget is funded by oil, a revenue source that “is very volatile,” Galvan said.