Pemex is working to lift output at younger oil fields such as Ku-Maloob-Zaap and Chicontepec, but neither is likely to overtake Cantarell before 2012.
Mexico reserves on the slide
Mexico's proved oil and gas reserves dipped to 15.5 billion barrels of oil equivalent at the end of 2006, down 5.8% from a year earlier, Jesus Reyes Heroles, head of state-oil company Pemex, said.
19 March 2007 8:30 GMT
Updated
19 March 2007 8:30 GMT
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