Brazilian state-run energy giant Petroleo Brasileiro SA (PBR), or Petrobras, notified the country's National Petroleum Agency late Thursday that it had discovered signs of oil at an inland Espirito Santo Basin block.

Petrobras said it found traces of oil in a well drilled at the ES-T-382 inland block. The 4BRSA742ES well was drilled by the DRILLFOR-04 rig to a target depth of 635 meters, ANP drilling data showed.

Oil companies operating in Brazil must inform the ANP of indications of oil, gas or hydrocarbons in any exploratory well within 48 hours.

Petrobras registered the find with the ANP on June 30.

The disclosures are routine and do not indicate commercial viability.

-By Daniel McCleary, Dow Jones Newswires; 55-21-2586-6085; brazil@dowjones.com