Drilling Update: Perth Basin

Roc Oil Company Limited 20 February 2008 20 February 2008 ROC OIL COMPANY LIMITED ('ROC') STOCK EXCHANGE RELEASE DRILLING UPDATE: FRANKLAND-2 APPRAISAL WELL, OFFSHORE PERTH BASIN Further to ROC's Drilling Activity Update issued this morning in relation to the drilling of Frankland-2 appraisal well, Roc Oil (WA) Pty Limited advises that cyclonic activity appears to be abating and de-manning of non essential crew has been put on hold. As at 1200 hours (local time) the Premium 'Wilcraft' jack-up rig is currently drilling ahead and has drilled to 1690 mBRT. ROC continues to closely monitor weather conditions. Participating Interests in the WA-286-P joint venture are: Roc Oil (WA) Pty Limited................................... 37.5% AWE Oil (Western Australia) Pty Ltd........................ 27.5% ARC Energy (Offshore PB) Limited........................... 30.0% CIECO Exploration and Production (Australia) Pty Ltd........ 5.0% In accordance with ASX and AIM Rules, the information in this Release has been reviewed and approved by Dr John Doran, Chief Executive Officer, Roc Oil Company Limited, BSc (Hons) Geology, MSc and PhD. Dr Doran, who is a member of the Society of Petroleum Engineers, has more than 30 years of relevant experience within the industry and consents to the information in the form and context in which it appears. Damian Fisher General Manager External 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)20 7495 5707/+61 (0)2 8356 2000 Mob: +44 (0)7751 3671 49/+61 (0)417 261 727 Email: khird@rocoil.com.au Michael Shaw Oriel Securities Limited (Nominated Adviser) Tel: +44 (0)20 7710 7600 Bobby Morse Buchanan Communications Tel: + 44 (0)20 7466 5000 Fax: + 44 (0)20 7466 5001 E-Mail: bobbym@buchanan.uk.com Mob: +44 (0)7802 875 227 This information is provided by RNS The company news service from the London Stock Exchange
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