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National business paper Portafolio reports that Ecopetrol is preparing an analysis of the delivery date and costs of the Cartagena Refinery (Reficar) enlargement. Initially the company approved a US$4.9B budget; however, costs could exceed th US$5B. Ecopetrol expects to complete four of the fourteen units that make up the enlargement this year, which will become operational only when the entire set is ready, as the units are part of a complete refinement cycle.