The development stages:Exploration drilling/2013-10.The El Mangrullo field is jointly owned by Argentine power holding company Pampa Energía's subsidiary Petrolera Pampa (Pepasa) and the Argentine subsidiary of Brazilian NOC Petrobras. The companies agreed to jointly invest in the field and expect to achieve a production level (plateau) of 400,000m3/d for a period of four years. Under the agreement, Pepasa will invest up to US$16mn in the drilling of four wells, with the aim of ensuring gas supply to its thermo Loma de la Lata.