A report by Gaffney, Cline & Associates (GCA) has found 6.5 million barrels of proved plus probable reserves at the field, according to joint venture partner 3D Oil.
3D previously reported the field held a best estimate of 9.2 million barrels of recoverable oil.
This is an update of the 2011 report which established contingent resources for the field.
3D Oil said the independent assessment of reserves provided certainty when looking for financing and major contracts.
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