Petro Rio S A : AUGUST 2021 OPERATIONAL DATA

August 2021 Operational Data

Rio de Janeiro, September 09, 2021 - Petro Rio S.A. ("Company" or "PetroRio") (B3: PRIO3), following best practices in corporate governance and transparency, informs its preliminary and non-audited Operational Data for the month of August.

		Daily Production (boepd)					Oil Offtakes (bbl)
	(1)			TBMT	Manati	Total		Month	Frade	Polvo		TBMT	Total
Month	Frade	Polvo		(80%)(2)	(10%)(3)
						January	-	-		-	-
January	12,005	9,498		6,701	2,157	30,362
		February	1,020,846	514,794		392,072	1,927,712
February	16,247	5,904		5,934	1,806	29,891
March	17,005	8,655		5,748	2,289	33,698		March	-	-		-	-
1Q21	15,086	8,019		6,128	2,084	31,317		1Q21	1,020,846	514,794		392,072	1,927,712
April	15,716	8,157		5,698	1,982	31,553
		April	1,029,950	601,345		312,163	1,943,457
May	12,653	9,353		5,703	2,304	30,013
		May	-	-		-	-
June	16,454	9,019		4,350	2,287	32,110
2Q21	14,941	8,843		5,250	2,191	31,225		June	500,001	393,610		-	893,610
	(1)	Cluster Polvo + TBMT	Manati			2Q21	1,529,950	994,955		312,163	2,837,067
Month	Frade		(95%)	(10%)(3)	Total
		July	-	754,168		319,742	1,073,910
July	16,616		11,622	1,989	30,228
		August	986,039		-	986,039
August	16,588	15,054(4)	1,950	33,593

Obs:

1. Frade figures account for a 70% interest in the Frade Field until February 4 and 100% interest as of February 5, when the Company announced the closing of the acquisition of the remaining 30% interest.
2. Since February, the Tubarão Martelo Field's production was reduced due to a shutdown in the TBMT-8H well, as a result of a failure in the electric submersible pump (ESP), which was in operation since the beginning of the field's production. After the well's cleaning, the workover was temporarily halted for the completion of the TBMT-10H well, that is being carried out by the Kingmaker rig, which will subsequently return to conclude the TBMT-8H workover.
3. On November 5, 2020, the sale of the 10% interest in the Manati Field held by PetroRio was announced, which awaits precedent conditions for the transaction's closing.
4. In August, the Polvo Field's production was impacted by the POL-012-R well workover, which was concluded in the first half of the month.

About PetroRio
PetroRio is the largest independent oil and gas Company in Brazil. The Company seeks to increase production through the acquisition	Investor Relations
of new producing assets, redevelopment, increased operational efficiency and rationalization of operating costs and corporate	ri.petroriosa.com.br
expenses. PetroRio's main objective is to create value for its shareholders with growing financial discipline and preserving its liquidity,	[e-mail]
with full respect for safety and the environment. For further information, please visit the Company's website: www.petroriosa.com.br.	[phone]