Gran Tierra Energy Tests 3,095 Barrels of Oil/ Day with Bretaña Norte 95-2-1XD in Peru

Gran Tierra Energy Inc. ("Gran Tierra Energy") GTE, a company focused on oil exploration and production in South America, today provided updates for its exploration drilling in Peru. "Gran Tierra Energy has successfully completed testing of the sidetrack on the Bretaña Norte 95-2-1XD exploration well in Peru, with results supporting the significant potential production additions expected from the Bretaña field," said Dana Coffield, President and Chief Executive Officer of Gran Tierra Energy. "After joining Canadian Prime Minister Stephen Harper during last week's trade envoy to Peru and Colombia, I am further encouraged by Gran Tierra Energy's commitment to the vast potential in Peru.  This discovery has material contingent resource potential, and is expected to provide significant growth for the company and assist Perupetro in achieving its objectives to bring new oil to the market on behalf of the Government of Peru," concluded Coffield. Peru  Block 95 (100% working interest and operator) Gran Tierra Energy completed initial testing of the Vivian Formation sandstone reservoir in the horizontal sidetrack of the Bretaña Norte 95-2-1XD exploration well.  Log interpretation of the 1,595 foot sidetrack See full press release