The development stages:Exploration drilling/2004-09.The Talora block in the upper Magdalena basin is operated by Calgary-based Petrodorado Energy, which has a 65% working interest. The company has drilled Dorados-1X, Verdal-1 and Verdal 2X wells, where multiple hydrocarbon-bearing sandstones have been identified, fulfilling the terms of an agreement with Agencia Nacional de Hidricarburos (ANH). Petrodorado has officially entered into phase two of the post-exploration program. In the second phase, the Talora partners have committed to one additional exploration well by July 30, 2015. Sintana Energy has the remaining 35% non-operating working interest.