The development stages:Exploration drilling/2011-03.The Put-8 block covers an area of 41,601ha. It has one exploration well and 208 square kilometers of 3D seismic. The block has had limited exploration and is bordered by a number of proven oil fields. Two drill-ready prospects have been identified in new 3D seismic and significant upside has been identified in sands adjacent to the Cohembi field. The block has resources of 45Mb of oil. The block was originally awarded to Vetra Energía and Platino Energy (Barbados) Ltd. in the 2010 Colombian Round, launched by the country's national hydrocarbons agency (ANH). In 2016, Amerisur Resources acquired Platino Energy's 50% non-operated working interest.