Start of negotiations to revise the Braskem Shareholder's Agreement

Rio de Janeiro, July 18, 2017 – Petróleo Brasileiro S.A. – Petrobras informs
that it has begun negotiations with Odebrecht S.A. to promote the revision of
the terms and conditions of the Braskem S.A. Shareholder's Agreement, celebrated
on February 8, 2010.

This revision aims to improve Braskem’s corporate governance and the corporate
relationship between the parties, with the purpose of creating value for all
Braskem shareholders.

Braskem is a publicly-traded company, with shares traded on stock exchanges in
Brazil and abroad, with Odebrecht holding 50.1% of its voting capital and
Petrobras holding 47%.

It should be noted that Petrobras is constantly pursuing the appreciation of its
portfolio, which includes evaluating possible amendments in shareholders'
agreements it executes, in the companies in which it holds a stake.

Facts deemed material in this matter shall be timely communicated to the market.

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www.petrobras.com.br/ir
Contacts:
PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investor Relations Department I e-mail:
petroinvest@petrobras.com.br
Av. República do Chile, 65 – 10th floor, 1002 – B – 20031-912 – Rio de Janeiro,
RJ | Phone: 55 (21) 3224-1510 / 3224-9947

FORWARD-LOOKING STATEMENTS
This release includes forward-looking statements within the meaning of Section
27A of the Securities Act of 1933, as amended, and Section 21E of the Securities
Exchange Act of 1934, as amended, that are subject to risks and uncertainties.
The forward-looking statements, which address the Company’s expected business
and financial performance, among other matters, contain words such as “believe,”
“expect,” “estimate,” “anticipate,” “optimistic,” “intend,” “plan,” “aim,”
“will,” “may,” “should,” “could,” “would,” “likely,” and similar expressions.
Readers are cautioned not to place undue reliance on these forward-looking
statements, which speak only as of the date on which they are made. There is no
assurance that the expected events, trends or results will actually occur. We
undertake no obligation to publicly update or revise any forward-looking
statements, whether as a result of new information or future events or for any
other reason.

The Company’s actual results could differ materially from those expressed or
forecast in any forward-looking statements as a result of a variety of
assumptions and factors. These factors include, but are not limited to, the
following: (i) failure to comply with laws or regulations, including fraudulent
activity, corruption, and bribery; (ii) the outcome of ongoing corruption
investigations and any new facts or information that may arise in relation to
the “Lava Jato Operation”; (iii) the effectiveness of the Company’s risk
management policies and procedures, including operational risk; and (iv)
litigation, such as class actions or proceedings brought by governmental and
regulatory agencies.  A description of other factors can be found in the
Company’s Annual Report on Form 20-F for the year ended December 31, 2016, and
the Company’s other filings with the U.S. Securities and Exchange Commission.