Completion of Drilling

Regal Petroleum PLC 23 January 2004 For Immediate Release 23 January 2004 REGAL PETROLEUM PLC ('Regal') Kavala Oil S.A. Completes Drilling of First Kallirachi Well The directors are pleased to announce that Kavala Oil S.A. ('Kavala') has successfully completed the drilling of an exploration well to a depth of 2,556 metres in the Kallirachi exploration field in Greece, and that the presence of hydrocarbons has been detected. Initial logging of the well indicates a 200 metre gross pay zone with a 61 metre sweet oil net pay zone. Additional technical interpretation and analysis has commenced in order to quantify and confirm the deliverability of the reservoir. Regal will announce the findings of the technical interpretation as soon as they are completed. The cost of drilling was within budget and was funded from the credit facility provided by Regal to Kavala Prior to the drilling of the exploration well, independent experts estimated that the field may contain up to 227 million barrels of recoverable oil. The initial results of this exploration well confirm the confidence of the Directors in the considerable potential of the Kallirachi field. Kavala is a private company incorporated in Greece in which Regal has an indirect 57.69 per cent. interest. For further information, please contact: Regal Tel: 020 7647 6622 Frank Timis, Executive Chairman Stephen West, Company Secretary Buchanan Communications Tel: 020 7466 5000 Bobby Morse / Catherine Miles This information is provided by RNS The company news service from the London Stock Exchange
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