The Tacobo, Tajibo and Curiche fields are located in one of the more prospective areas of Bolivia. The operator has been actively investing on exploration in efforts to delineate the field better and develop the potential gas reserves. Production from the fields must satisfy the domestic market before exporting to Argentina and Brazil. The Tacobo field lies in the Sub-Andean foothills, and is located in the Tacobo Block, in the north of the former San Isidro exploration licence. The field produces from the gas-rich, deep Devonian Huamampampa Formation. The Huamampampa Formation, the youngest and most important of the deep Devonian reservoirs, consists of alternating fine-grained sandstones and siltstones, deposited in a shallow marine shelf environment. It averages around 500 metres in thickness across the Tarija Basin, of which approximately half is net-pay.