OREANDA-NEWS. August 12, 2011. HRT Participacoes em Petroleo S.A. announces that its subsidiary HRT O&G Exploracao e Producao de Petroleo Ltda. (“HRT O&G”), spudded its fourth exploration well, location 1-HRT-194/01-AM, codified by the National Petroleum, Natural Gas and Biofuel Agency - ANP as 1-HRT-4-AM.

This fourth well is located in the Municipal District of Coari, in the State of Amazonas, and is being drilled by the Tuscany drilling rig - TUS-116, targeting a final depth of approximately 2,730 meters.

This well is being drilled in the contingent resource structure called Igarape Maria (IMA), located 2.8 km to the south of the Sudoeste de Urucu Field (SUC) in the Solimoes Basin, to test the crest of an anticlinal structure, around 28 km2 of closed area, 5.4 km northeast of the gas and condensate discovery well, 1-IMA-1-AM, and 6.5 km southeast of the gas and condensate discovery well, 1-CRP-1-AM , both on the northeastern structural trend that defines the Urucu oil and gas Province.

The main objectives of this well are the eolian sandstones of the Lower Jurua Formation expected at a depth of approximately 2,420 meters, while the secondary objectives are the sandstones of the Upper Jurua Formation, expected at a depth of around 2,340 meters and those of the Devonian Sequence (Uere Formation), expected as of 2,515 meters.

HRT O&G holds 55% participating interest in 21 exploration blocks in the Sedimentary Basin of Solimoes, covering an area of approximately 48.5 thousand km2, where 52 prospects have been mapped and certified and 11 discoveries were classified as contingent resources.