ÓLEO E GÁS PARTICIPAÇÕES S.A. - Em Recuperação Judicial CNPJ/MF: 07.957.093/0001-96 Public Company - BOVESPA: OGXP3 Material Fact - Beginning of Production in the Fourth Well of the Tubarão Martelo Field in the Campos Basin - Rio de Janeiro, September 4th, 2013 - Óleo e Gás Participações S.A. - Em Recuperação Judicial ("Company") (Bovespa: OGXP3; OTC: OGXPY.PK), announces that it has begun the production of the fourth well in the Tubarão Martelo field, located in the BM-C-39 and BM-C-40 blocks, through the horizontal well TBMT-6HP.

The fourth well at Tubarão Martelo Field infers another important completed step within its operational activities and in compliance with the Reorganization Plan's targets.

LEGAL NOTICE

This document contains Company-related statements and information that reflect the current vision and/or expectations the Company and its management have regarding its business plan. These include, among others, all forward-looking statements that involve forecasts and projections, indicate or imply results, performance or future achievements, and may contain words such as "believe," "foresee," "expect," "consider," "is likely to result in" or other words or expressions of similar meaning. Such statements are subject to a series of expressive risks, uncertainty and premises. Please be advised that several important factors can cause the actual results to diverge materially from the plans, objectives, expectations, estimations, and intentions expressed in this document. In no event shall the Company or the members of its board, directors, assigns or employees be liable to any third party (including investors) for investment decisions or acts or business carried out based on the information and statements that appear in this presentation, or for indirect damage, lost profit or related issues. The Company does not intend to provide to potential shareholders with a revision of the statements or an analysis of the differences between the statements and the actual results. Each investor must conduct and rely on its own evaluation, including of
the associated risks, in making an investment decision.

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OGpar Contacts

Investors:
Marcia Mainenti Marianna Sampol ri@ogpar.com.br
+55 21 3916 4545
Media:
Cibele Flores, cibele.flores@ogpar.com.br
+55 21 3916 4588

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