The Campo Rico Block currently contains six oil fields and the major producer is Vigia Sur which came on stream in 2013. Oil produced in this block is processed at in field production facilities before being trucked to the nearby Santiago field where it enters the pipeline network. The Campo Rico Centauro Sur Vigía Los Potros Las Acacias and Vigia Sur fields lie in the prolific onshore Llanos basin in the east of Colombia. The Campo Rico field structure is a tilted fault block formed by normal faulting. The principal reservoir is the Eocene Mirador formation which exhibits high porosity and permeability. A secondary reservoir is the Cretaceous Une formation. Both formations are sealed by the Carbonera formation shales (C8). The principal source rock is the Gacheta formation. Oil is also produced from the Mirador at Centauro Sur but at Vigía the oil is produced from the Une and Lower Gacheta formations.