6-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE
SECURITIES EXCHANGE ACT OF 1934

For the month of December 2011

Commission File Number 001-15106 Commission File Number 001-33121

PETRÓLEO BRASILEIRO S.A. — PETROBRAS (Exact name of registrant as specified in its charter)	PETROBRAS INTERNATIONAL FINANCE COMPANY (Exact name of registrant as specified in its charter)
BRAZILIAN PETROLEUM CORPORATION — PETROBRAS (Translation of registrant’s name into English)	Not Applicable (Translation of registrant’s name into English)
Avenida República do Chile, 65 20035-900 — Rio de Janeiro — RJ, Brazil (55-21) 3224-4477 (Address of principal executive offices)	4th Floor, Harbour Place 103 South Church Street P.O. Box 1034GT — BWI George Town, Grand Cayman Cayman Islands (Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F þ Form 40-F o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):_____

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant’s “home country”), or under the rules of the home country exchange on which the registrant’s securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant’s security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes o No þ

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-_______.

This report on Form 6-K is incorporated by reference in the Registration Statement on Form of F-3 of Petróleo Brasileiro S.A. — Petrobras (No. 333-163665) and Petrobras International Finance Company (No. 333-163665-01) and the preliminary prospectus supplement dated as of December 1, 2011.

Exhibits

Exhibit 15.1 — Awareness Letter of KPMG Auditores Independentes

Exhibit 15.2 — Awareness Letter of KPMG Auditores Independentes

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrants have duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	PETROLEO BRASILEIRO S.A. — PETROBRAS
	By	/s/ Daniel Lima de Oliveira
		Daniel Lima de Oliveira Executive Manager
	PETROBRAS INTERNATIONAL FINANCE COMPANY
	By	/s/ Sérvio Túlio da Rosa Tinoco
Date: December 1, 2011		Sérvio Túlio da Rosa Tinoco Chief Financial Officer

3

EX-15.1

Exhibit 15.1

KPMG Auditores Independentes	Central Tel	55 (21) 3515-9400
Av. Almirante Barroso, 52 — 4º	Fax	55 (21) 3515-9000
20031-000 — Rio de Janeiro, RJ — Brasil	Internet	www.kpmg.com.br
Caixa Postal 2888
20001-970 — Rio de Janeiro, RJ — Brasil

To
Petróleo Brasileiro S.A. — Petrobras
Rio de Janeiro, Brazil

December 1^st, 2011

With respect to the registration statement on Form F-3 (333-163665), we acknowledge our awareness of the incorporation by reference therein of our report dated November 22, 2011, related to our review of interim financial information of Petróleo Brasileiro S.A. — Petrobras.

Pursuant to Rule 436 under the Securities Act of 1933 (the “Act”), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG Auditores Independentes

KPMG Auditores Independentes
Rio de Janeiro, Brazil

KPMG Auditores Independentes, uma sociedade simples brasileira e firma-membro da rede KPMG de firmas-membro independentes e afiliadas à KPMG International Cooperative (“KPMG International”), uma entidade suíça. KPMG Auditores Independentes, a Brazilian entity and a member firm of the KPMG network of independent member firms affiliated with KPMG International Cooperative (“KPMG International”), a Swiss entity.

EX-15.2

Exhibit 15.2

KPMG Auditores Independentes	Central Tel	55 (21) 3515-9400
Av. Almirante Barroso, 52 — 4º	Fax	55 (21) 3515-9000
20031-000 — Rio de Janeiro, RJ — Brasil	Internet	www.kpmg.com.br
Caixa Postal 2888
20001-970 — Rio de Janeiro, RJ — Brasil

To
Petrobras International Finance Company (“PifCo”)
Rio de Janeiro, Brazil

December 1^st, 2011

With respect to the registration statement on Form F-3 (333-163665-01), we acknowledge our awareness of the incorporation by reference therein of our report dated November 22, 2011, related to our review of interim financial information of Petrobras International Finance Company.

Pursuant to Rule 436 under the Securities Act of 1933 (the “Act”), such report is not considered part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG Auditores Independentes

KPMG Auditores Independentes
Rio de Janeiro, Brazil

KPMG Auditores Independentes, uma sociedade simples brasileira e firma-membro da rede KPMG de firmas-membro independentes e afiliadas à KPMG International Cooperative (“KPMG International”), uma entidade suíça. KPMG Auditores Independentes, a Brazilian entity and a member firm of the KPMG network of independent member firms affiliated with KPMG International Cooperative (“KPMG International”), a Swiss entity.