• Participation - Gran Tierra (Operator) 40% ; Delavaco 51%; Omega 9%
• Area - 144,670 acres (gross) 57,868 acres net

Gran Tierra Energy entered into the Rio Magdalena Association Contract in February 2002. GTE is the operator of the Rio Magdalena Block and has a 100% working interest. Under the terms of a recently completed farm-in agreement, Omega Energy Colombia will earn a 60% working interest by paying 100% of the costs associated with Popa-2 well. In the event of a commercial discovery, Ecopetrol has the right to back-in for a 30% working interest, to be split proportionally between GTE and Omega.