Investor Presentaiton

Main fields by region in Colombia Source: Ecopetrol Region Share Main fields 2011 Avg. Production (mboed) Central 42% Castilla 110 Chichimene 32 Rubiales + Quifa 113 Northeast 29% Guajira Cusiana 64 36 Mid Magdalena 12% La Cira Infantas Nare 17 736 16 Catatumbo 8% Tibú 2 South 9% Orito Tenay Tello 323 60% Years 16

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