6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OFFOREIGN ISSUER

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of September 2020

Commission File Number: 001-15006

PETROCHINA COMPANY LIMITED

9 DongzhimenNorth Street, Dongcheng District

Beijing, The People’s Republic of China, 100007

(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  ☒    Form 40-F  ☐

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):  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

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  ☐    No  ☒

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

EXHIBITS

Exhibit Number

99.1 Change of closure of the register of members for interim dividend of H shares.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this announcement to be signed on its behalf by the undersigned, thereunto duly authorized.

EX-99.1

Exhibit 99.1

Hong Kong Exchanges and Clearing Limited and TheStock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or inreliance upon the whole or any part of the contents of this announcement.

中國石油天然氣股份有限公司

PETROCHINA COMPANY LIMITED

(a joint stock limited company incorporated in the People’s Republic of China with limited liability)

(Stock Code: 857)

Change of Closure of the Register of Members for Interim Dividend of H Shares

We refer to the announcement made by PetroChina Company Limited (the “Company”) dated 27 August 2020 (the “Announcement”) in relation to, among other things, the interim results for the six months ended 30 June 2020, the interim dividend and the date of the closure of register of members of the Company thereof. We also refer to the circular of the Company dated 12 August 2020 (the “Circular”) in relation to, among other things, the convening of the Company’s second extraordinary general meeting of 2020 and the date of the closure of register of members of the Company thereof.

As disclosed in the Circular, the register of members of H shares of the Company (the “H Shares”) has been closed since Saturday, 29 August 2020 and will continue to be closed until Monday, 28 September 2020 (both days inclusive), during which period no share transfer of H Shares will be registered.

To provide sufficient time for the shareholders of the Company to lodge transfers in order to qualify for the interim dividend of H Shares, the Company announces that the original book closure dates for the interim dividend of H Shares and other relevant dates as set out in the Announcement are revised as follows:

All transfer documents together with the relevant share certificates shall be lodged at Hong Kong Registrars Limited (address: Hong Kong Registrars Limited, Shops 1712-1716, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong).

Save as disclosed above, the other information contained in the Announcement remains unchanged.

Beijing, the PRC

4 September 2020

As at the date of this announcement, the Board comprises Mr. Dai Houliang as Chairman; Mr. Li Fanrong as Vice Chairman and non-executive Director; Mr. Liu Yuezhen, Mr. Lv Bo and Mr. Jiao Fangzheng as non-executive Directors; Mr. Duan Liangwei as executive Director; andMs. Elsie Leung Oi-sie, Mr. Tokuchi Tatsuhito, Mr. Simon Henry, Mr. Cai Jinyong and Mr. Jiang, Simon X. as independent non-executive Directors.