Drilling Update: Perth Basin

1 May 2007 07:03

Roc Oil Company Limited01 May 2007 1 May 2007 ROC OIL COMPANY LIMITED ("ROC") STOCK EXCHANGE RELEASE Drilling Activity Update: Offshore Perth Basin Exploration Drilling - Perseverance-1 Roc Oil (WA) Pty Limited advises that, as of 0600 hrs on 1 May 2007 AustralianWestern Standard Time ("AWST"), the demobilisation of the Premium "Wilcraft" rigfrom Frankland-1 exploration well in WA-286-P has been delayed due to adverseweather conditions outside normal rig operating limits. The forward programme for the "Wilcraft" rig is to move to the Perseverance-1exploration well location in WA-325-P, approximately 80 km north of Frankland-1,as soon as weather permits. Participating Interests in WA-286-P are: Roc Oil (WA) Pty Ltd (Operator)....................................37.5%AWE Oil (Western Australia) Pty Ltd................................27.5%Wandoo Petroleum Pty Ltd (Mitsui & Co Group of Companies)..........24.0%ARC (Offshore PB) Limited...........................................6.0%CIECO Exploration and Production (Australia) Pty Ltd................5.0% Participating Interests in WA-325-P are: Roc Oil (WA) Pty Ltd (Operator)....................................37.5%Apache Northwest Pty Limited.......................................37.5%ARC (Offshore PB) Limited..........................................20.0%Wandoo Petroleum Pty Ltd (Mitsui & Co Group of Companies)...........5.0% Damian FisherGeneral ManagerExternal Affairs & Investor Relations For further information please contact: Dr John Doran on Tel: +61-2-8356-2000 Fax: +61-2-9380-2635 Email: 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