London-The recent slump in global oil prices is casting doubt on the sustainability of current non-OPEC supply growth rates, with roughly 2.6 million b/d of oil production vul- nerable to Brent oil price below $80/barrel, the International Energy Agency said Tuesday. Brent crude futures have fallen by more than a quarter in value since June-dipping this week to near four-year lows of below $87/b-a drop which has focused attention on breakeven levels for world’s costliest oil projects.
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