The development stages:Exploration drilling/2011-12.The RC-11 offshore block is operated by Repsol and covers an area of 185,000ha. It is located off Colombia's Caribbean coast. The company has worked on the acquisition of 3D seismic in the area and plans to drill the Siluro well to target a Miocene formation with a 26.5% chance of success. It has estimated resources of 1.6Tcf of natural gas.