PeruBlock 95 (100% working interest and operator) Gran Tierra Energy has initiated drilling of the horizontal side-track extension of the Bretaña Norte 95-2-1XD oil discovery well. Casing has been set at the top of the Vivian reservoir, where very high quality sands with very good oil shows were encountered, and the drilling of a 500 meter horizontal leg has been initiated. Upon completion, a short test will be conducted. Plans are ongoing to initiate long-term testing from this horizontal well, with production to be initiated within a year. In addition, a Preliminary Front End Engineering Design has been initiated for the Bretaña Norte field development to support reserves booking, with results expected before year-end. Brazil Block 142 (100% working interest and operator) Gran Tierra Energy's horizontal multi-stage fracture stimulation exploration drilling program in the Recôncavo Basin onshore Brazil is ongoing, with results of the program expected mid-year. About Gran Tierra Energy Inc. Gran Tierra Energy is an international oil and gas exploration and production company, headquartered in Calgary, Canada, incorporated in the United States, trading on the NYSE MKT (GTE) and the Toronto Stock Exchange (GTE), and operating in South America. Gran Tierra Energy holds interests in producing and prospective properties in Colombia, Argentina, Peru, and Brazil. Gran Tierra Energy has a strategy that focuses on establishing a portfolio of producing properties, plus production enhancement and exploration opportunities to provide a base for future growth. Gran Tierra Energy's Securities and Exchange Commission filings are available on a web site maintained by the Securities and Exchange Commission at http://www.sec.gov and on SEDAR at http://www.sedar.com. Forward Looking Statements and Advisories A barrel of oil equivalent ("BOE") is calculated using the conversion factor of six thousand cubic feet ("Mcf") of natural gas being equivalent to one barrel of oil. BOEs may be misleading, particularly if used in isolation. A BOE conversion ratio of 6 Mcf : 1 barrel of oil is based on an energy equivalency conversion method primarily applicable at the burner tip and does not represent a value equivalency at the wellhead. In addition, given that the value ratio based on the current price of oil as compared to natural gas is significantly different from the energy equivalent of six to one, utilizing a BOE conversion ratio of 6 Mcf: 1 barrel of oil would be misleading as an indication of value.