The Ucayali Basin of onshore Peru covers 138,000 km 2 of dense Amazon jungle and rugged Andean mountain terrain. It is under-explored, and infrastructure is limited to developments in the extreme north and south of the basin. The basin is gas prone, and we expect more than 9 tcf of gas (plus 525 mmbbl of associated liquids) to be discovered over the next 20 years. The majority of gas is currently sold to the domestic market for industrial use, with the remainder produced for export via Peru LNG. The sole pipeline feeding into the LNG plant is operating at full capacity and hence half of the volume discovered in the last decade is stranded without access to infrastructure. Construction of the Southern Gas Pipeline (GSP), designed to connect gas fields in the Camisea region to demand centres in the south, began in 2014, but has suffered significant delays. This report is accompanied by multiple excel downloads which detail costs, volumes and value.