• Participation – Gran Tierra 14%, Pluspetrol (Operator) 38.15%, Repsol YPF 30%, CGC 17.85%
• Area – 341,500 acres (gross); 47,810 acres (net)

The Palmar Largo joint venture encompasses several producing oil fields in the Noroeste Basin of Argentina. Approximately 44 million barrels of oil (gross before royalties) have been recovered from the area since 1984. A total of 13 (gross) wells are currently

El Chivil

• Participation – Gran Tierra Energy (Operator) 100%
• Area – 30,393 acres

Gran Tierra Energy acquired its participation at El Chivil via the purchase of majority and minority interests in December 2006, complementing its current production base in the Noroeste region.

Surubi

• Participation – Gran Tierra 85% Province 15%
• Area – 90,688 acres (gross) 77,085 acres (net)

Gran Tierra Energy acquired its interest at Surubi in December 2006 via the acquisition of the majority and minority interests in the block. The Proa-1 prospect was drilled in Q3, and is currently on production.