The development stages:Exploration drilling/2009-03.Block Valle Magdalena Medio 4, or VMM-4 is owned and operated by LOH Energy Sucursal Colombia, who as of July 2014 has been responsible for a 100% of Exploration Phase II costs and to facilitate and accelerate execution of the License Contract Work Program. Sintana Energy has adjusted its participation interest, retaining 15% of it. The acreage covers 154,909 gross acres in Colombia's Middle Magdalena basin. Exploratory drilling authorized by Colombia's hydrocarbons regulator ANH is currently underway in the area.