Amerisur Resources Plc is a United Kingdom-based company. The Company is engaged in investing in oil and gas exploration and development in South America, principally in Paraguay and Colombia. The Company owns 100% interest in the Putumayo Basin, which is a 14,341 hectare block located in the Putumayo Basin, in the south of Colombia, and has two production wells, Alea-1R and Platanillo-2. As of December 31, 2011, the Company held 100% interests in Fenix. The 24,117 hectare area is located in the Middle Magdalena Basin of Colombia. The Company also owns 100% interest in San Pedro Block and Curupayty Block located in Paraguay. The San Pedro Block covers approximately 800,000 hectares in the North West of the Parana basin. Approximately 1,000 kilometer of two dimensional seismic data has been reprocessed in Bogota, and has been re-interpreted both in house in Bogota and by a geophysical consultancy in Perth, Australia.