Petro Rio : DECEMBER 2017 OPERATIONAL DATA

December 2017 Operational Data

Rio de Janeiro, January 8, 2018 - Petro Rio S.A. ("Company" or "PetroRio") (B3: PRIO3), in compliance with best practices in corporate governance and transparency, informs its preliminary and non-audited Operational Data.

POLVO
Month	Average Production (bpd)¹	Offtakes (bbl)²
jan	8,684	0
feb	7,506	0
mar	8,382	503,312
1Q17	8,213	503,312
apr	8,337	300,360
may	8,303	373,810
jun	7,470	223,628
2Q17	8,040	897,799
jul	7,537	0
aug	7,705	596,880
sep	7,723	0
3Q17	7,654	596,880
oct	7,465	418,869
nov	7,742	0
dec	6,865	425,479
4Q17	7,353	844,348
2017	7,812	2,842,339

MANATI³
Month	Average Volume (m³/day)
jan	427,861
feb	416,762
mar⁴	409,373
1Q17	418,040
apr	458,015
may	457,978
jun	419,072
2Q17	445,164
jul	491,698
aug	490,230
sep	463,536
3Q17	482,020
oct	481,020
nov	512,521
dec	540,755
4Q17	511,420
2017	464,466

1 Average barrels per day (bpd)	3 Refers to PetroRio's 10%W.I.
2 Total barrels sold	4 Manati results were consolidated as of
March 20, 2017, with the acquisition of
Brasoil
About PetroRio

PetroRio is one of the largest independent companies in the oil and gas production in Brazil. The Company´s corporate culture seeks to increase production through the acquisition of new production assets, the re-exploration of assets, increased operational efficiency and reduction of production costs and corporate expenses. PetroRio's main objective is to create value for its shareholders with growing financial discipline and preserving its liquidity, with full respect for safety and the environment. For further information, please visit the Company's website:www.petroriosa.com.br.

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