The unnamed well, planned to be hydraulically fractured in late November, came across 1214 feet of potential net pay, the Latin American-focussed firm said in its quarterly earnings release.

Gran Tierra has a 100% stake in the Puesto Morales and Puesto Morales Este blocks, in which the company is also carrying out an enhanced-recovery operation targeting the Sierras Blancas formation.

Gran Tierra also said two appraisal wells in Neuquen's Riconada Norte block had also come across oil in the project operated by Americas Petrogas, which has a 65% stake.