Petrobras Argentina S.A. ADS (PZE) 20-F 2013 FY Annual report (foreign)

Exhibit 8.1

List of Subsidiaries of Petrobras Argentina S.A.

		% Of Ownership and Votes
Subsidiaries	Country	Direct		Indirect		Business Segment
Atalaya Energy S.R.L.	Argentina		95.00		5.00	Oil and Gas Exploration and Production
Canadian Hunter Argentina S.A	Argentina		95.00		5.00	Oil and Gas Exploration and Production
Corod Producción S.A.	Venezuela		100.00		—	Oil and Gas Exploration and Production
EcuadorTLC S.A.	Ecuador		100.00		—	Oil and Gas Exploration and Production
Eg3 Red S.A.	Argentina		95.00		5.00	Refining and Distribution
Electricidade Com S.A.	Brasil		—		100.00	Gas and Energy
Enecor S.A.	Argentina		69.99		—	Gas and Energy
Petrobras Bolivia Internacional S.A.	Bolivia		100.00		—	Corporate
Petrobras Energía Colombia	Gran Cayman		—		100.00	Oil and Gas Exploration and Production
Petrobras Energía de México S.A. de C.V.	México		—		100.00	Oil and Gas Exploration and Production
Petrobras Energía Ecuador	Gran Cayman		—		100.00	Oil and Gas Exploration and Production
Petrobras Energía Internacional S.A.	Argentina		95.00		5.00	Corporate
Petrobras Energía Operaciones Ecuador S.A.	Ecuador		—		100.00	Oil and Gas Exploration and Production
Petrobras Hispano Argentina S.A.	España		100.00		—	Corporate
Petrolera San Carlos S.A.	Venezuela		—		100.00	Oil and Gas Exploration and Production
Transporte y Servicios de Gas en Uruguay S.A.	Uruguay		51.00		13.55	Gas and Energy
World Energy Business S.A.	Argentina		—		100.00	Gas and Energy
Petrolera Entre Lomas S.A.	Argentina		58.88		—	Oil and Gas Exploration and Production
Entities under joint control
Cía. de Inversiones de Energía S.A.	Argentina		25.00		25.00	Gas and Energy
Transportadora de Gas del Sur S.A.	Argentina		—		25.50	Gas and Energy
Associates
Coroil S.A.	Venezuela		20.00		29.00	Oil and Gas Exploration and Production
Inversora Mata S.A.	Venezuela		49.00		—	Oil and Gas Exploration and Production
Oleoducto de Crudos Pesados Ltd.	Gran Cayman		—		11.42	Oil and Gas Exploration and Production
Oleoducto de Crudos Pesados S.A.	Ecuador		—		11.42	Oil and Gas Exploration and Production
Oleoductos del Valle S.A.	Argentina		23.10		—	Oil and Gas Exploration and Production
Petrokariña S.A.	Venezuela		29.20		5.29	Oil and Gas Exploration and Production
Petroritupano S.A.	Venezuela		22.00		—	Oil and Gas Exploration and Production
Petroven-Bras S.A.	Venezuela		29.20		5.29	Oil and Gas Exploration and Production
Petrowayú S.A.	Venezuela		36.00		—	Oil and Gas Exploration and Production
Propyme S.G.R (en liquidación)	Argentina		48.56		0.07	Corporate
Refinería del Norte S.A.	Argentina		28.50		—	Refining and Distribution
Urugua-í S.A.	Argentina		29.33		—	Gas and Energy
Other entities
Termoeléctrica José de San Martín S.A.	Argentina		8.84		—	Gas and Energy
Termoeléctrica Manuel Belgrano S.A.	Argentina		8.84		—	Gas and Energy