Drilling Report

Roc Oil Company Limited 29 March 2005 29 March 2005 ROC OIL COMPANY LIMITED STOCK EXCHANGE RELEASE DRILLING ACTIVITY UPDATE: HADDA-1, EXPLORATION WILDCAT WELL, OFFSHORE PERTH BASIN, WESTERN AUSTRALIA Roc Oil (WA) Pty Ltd, Operator for and on behalf of the WA-325-P Joint Venture, advises that, as at 06.00 hours on 29 March 2005, Australian Western Standard Time, the ENSCO 56 jack-up drilling rig was released from the Hadda-1 location after the well had been plugged and abandoned as a dry hole with oil shows in tight sands. Hadda-1, a rank exploration wildcat well, was drilled as a vertical well in about 45 metres of water, about 150 km northwest of Geraldton, Western Australia and some 200 km northwest of the Cliff Head Oil Field. The Hadda Joint Venture comprises: Equities post-deals WA-325-P Current Equities announced but not yet completed Roc Oil (WA) Pty Ltd 37.50% 37.50% Apache Northwest Pty Limited 37.50% 37.50% Voyager (PB) Limited 10.00% 12.50% Bounty Oil & Gas NL 10.00% 7.50% Wandoo Petroleum Pty Limited 5.00% 5.00% Bruce Clement For further information please contact: Chief Operating Officer Dr John Doran on Tel: +61-2-8356-2000 Fax: +61-2-9380-2635 E-mail: jdoran@rocoil.com.au Or visit ROC's website: www.rocoil.com.au Dr Kevin Hird General Manager - Business Development Tel: +44 (0)207 586 7935 Fax: +44 (0)207 722 3919 Email: khird@rocoil.com.au Nick Lambert Bell Pottinger Corporate & Financial Tel: +44 (0)207 861 3232 This information is provided by RNS The company news service from the London Stock Exchange
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