Amerisur Resources plc is an independent full-cycle oil and gas company. The Company's principal activity is investing in oil and gas exploration and development in South America, principally in Paraguay and Colombia. It operates through oil exploration and development segment. It operates in Colombia, Paraguay and the United Kingdom. In Colombia, it is an operator and has interest in the Platanillo block, which includes the Platanillo field, an approximately 11,341-hectare block located in the Putumayo Basin. It has interests in block Put-12, which is adjacent to Platanillo. It also has interest in Put-30, an approximately 38,514-hectare block. In addition, the Company has an interest in the CPO-5 contract, located in the Llanos basin and a working interest in the Tacacho contract, located in the Caguan-Putumayo basin. In Paraguay, it owns over 5.2 million hectares covering approximately five oil and gas permits in the Paraguayan part of the Chaco and Parana Basins.