UPDATE 1-Brazil kicks off first oil, gas auction in five years
* Comes as govt intervention mounts, global supply seen up * Petrobras, Galp, OGX win blocks in early bidding * Areas on offer believed to hold 35 bln barrels of oil By Jeb Blount and Sabrina Lorenzi RIO DE JANEIRO, May 14 (Reuters) - Brazil on Tuesday kicked off its first
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