Holding(s) in Company

Gulf Keystone Petroleum Ld
15 August 2005


                Gulf Keystone Petroleum Limited ("the Company")

                       Notification of Interest in Shares


The Company was informed on 12 August 2005 by OppenheimerFunds, Inc. that, on
behalf of their clients, they have an interest in 9,000,000 common shares of
$0.01 each representing 3.55 per cent. of the issued common share capital of the
Company.


15 August 2005


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