Dommo Energia : Resumption of Production in 7-TBMT-8H Well

Dommo Energia S.A.

CNPJ/MF: 08.926.302/0001-05 Public Company - B3: DMMO3

Material Fact

- Resumption of Production in 7-TBMT-8H Well -

Rio de Janeiro, January 10th, 2018 - Dommo Energia S.A. ("Dommo Energia" or "Company") (B3: DMMO3;

OTC: DMMOY), announces to its shareholders and market in general that the production was resumed in 7-TBMT-8H well, which operates on Tubarão Martelo Field.

In accordance to the material fact disclosed on July 31st, 2017, the production on 7-TBMT-8H well had been interrupted after the decline of pressure on the wet Christmas tree and the absence of flow in the well line in the production unit (FPSO OSX-3).

The temporary interruption in the aforementioned well was consequence of an obstruction in the production line. The clearing of the well was achieved with the injection of chemical agents capable of dissolving the residues, without causing any adverse impact to the employees, facilities or environment.

The volume from the 7-TBMT-8H well will return to compose the disclosure of the monthly production numbers as of February 2018.

The Company will keep its shareholders and the market informed in case there are updates on this matter.

Rio de Janeiro, January 10th, 2018

Eduardo Yuji Tsuji

Chief Financial Officer and Investor Relations Officer

Dommo Energia S.A.

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.

Contacts

Investors: Eduardo Tsuji Pedro Serio Victor Rosenzvaig Cinthya [e-mail][phone]

Media:

Cibele [e-mail][phone]