ExxonMobil’s Liza field discovery 120 miles offshore Guyana may hold as much as 1.4 billion bbl of oil, which is double the previous estimate. The field will probably yield the equivalent of 800 million to 1.4 billion bbl of oil, the company said. As a field partner, Hesswould see a 39% increase in proved reserves at the upper level of the estimate. ExxonMobil, the operator, has a 45% stake in the discovery, with Hess and China National Offshore Oil Corporationholding 30% and 25% interests, respectively.


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