CHK Oil Limited — M&A Activity 2013

Nov 14, 2013

Hong Kong Exchanges and Clearing Limited and The Stock 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 in reliance upon the whole or any part of the contents of this announcement.

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(the “Company”) (Incorporated in Bermuda with limited liability)

(Stock Code: 632)

Update on the Possible Acquisition of Equity Interest in a Petroleum Company in China

Reference is made to the announcements of the Company dated 28 October 2013 and 4 November 2013 (the “Announcements”). Unless otherwise stated, capitalized terms used herein shall have the same meanings as those defined in the Announcements.

The Company was informed that the High Court of Hong Kong today granted Mr. Wong Kwan, the Chairman and Executive Director of the Company, an approval for leaving Hong Kong for the purpose of his one-off trip to China (the “Order”) and he will visit Guangdong Maoming Petroleum Group Co. so as to finalize the key terms and conditions of the Possible Acquisition as soon as practicable.

The Board welcomes the Order and believes Mr. Wong Kwan can fulfil his duties as the Chairman and Executive Director of the Company which is in the best interest of the Company and its shareholders as a whole.

As no agreement for the Possible Acquisition has yet been entered into, therefore, the Possible Acquisition may or may not proceed. Shareholders and investors are urged to exercise caution when dealing in the securities of the Company. Further announcement in respect of the Possible Acquisition will be made by the Company in the event any formal agreement has been signed in accordance with the applicable requirements under the Listing Rules, if and when appropriate.

As at the date hereof, the Board comprises four executive directors, namely Mr. Wong Yuk Kwan (alias: Wong Kwan), Mr. Law Wing Tak, Jack, Mr. Wong Hiu Tung and Mr. Zhou Li Yang; one non-executive director, namely Mr. Baiseitov Bakhytbek; and three independent non-executive directors, namely Mr. Lam Kwan, Mr. Chan Kwan Pak and Ms. Yuen Sau Ying, Christine.

By Order of the Board Pearl Oriental Oil Limited Law Wing Tak, Jack Executive Director and Chief Executive Officer

Hong Kong, 14 November 2013

• for identification purpose only