Attack affects about 6 percent of the country’s crude output Repairs on pipeline may be concluded by tomorrow: union Colombia, South America’s third-largest oil exporter, shut in production in at least three oilfields after attacks by Marxist guerrillas blew up one of the country’s main outlets to export crude. The attack on the Cano Limon-Covenas pipeline, which transports oil to Colombia’s Caribbean coast for export, forced production to be shut at the Cano Limon, Chipiron and Caricare oilfields, according to Humberto Alvarez, an oil workers’ union official who also works in one of the fields. The fields were producing a combined 56,000 barrels daily, or about 6 percent of the country’s output. Colombia’s second-largest pipeline was attacked in early July and repairs have been dragging on for almost a month because of bad weather and because the Armed Forces need to guarantee security of personnel working on the repairs, […]