PRIO Sept. 22 Operational Data

Petro Rio S.A. (“PRIO”), following best practices in corporate governance and transparency, informs its preliminary and non-audited Operational Data for the month of September.

Obs:

(1) The MUP3A well, in the Frade Field, had its production temporarily interrupted due to a failure in the completion equipment, and will be repaired during the fourth quarter. (2) Manati Field’s average production was impacted by a production interruption due to a decrease in gas demand.