CORRECTED - Petrobras may decide Aruba refinery buy Friday

(Corrects Petrobras CEO's name to Jose Sergio Gabrielli)

HOUSTON, May 6 (Reuters) - The Petrobras (PETR4.SA: Quote, Profile, Research) board of directors will hear a final report Friday on the possible purchase of Valero's (VLO.N: Quote, Profile, Research) Aruba refinery, and may make a decision at that time, officials said Tuesday.

"We are not committed to making a decision," said Jose Sergio Gabrielli, president and CEO of the Brazilian state oil company. "We may make a decision."

At an Offshore Technology Conference news briefing, Gabrielli said the purchase will be discussed. Downstream director Paulo Costa said the board will hear a final presentation analyzing the proposal.

Sources have told Reuters that Petrobras has agreed to buy the 275,000 barrel-per-day refinery on the Caribbean island of Aruba for about $2.8 billion. (Reporting by Bruce Nichols)