Drilling Activity Update

7 Nov 2005 07:00

Roc Oil Company Limited07 November 2005 7 November 2005 ROC OIL COMPANY LIMITED STOCK EXCHANGE RELEASE DRILLING ACTIVITY UPDATE KEY POINT • Flying Foam-1, a rank wildcat exploration well, starts drilling, offshore Perth Basin. Roc Oil (WA) Pty Ltd, Operator for and on behalf of the WA-327-P Joint Venture,advises that the ENSCO-67 jack-up drilling rig commenced drilling Flying Foam-1,a rank wildcat well in the offshore Perth Basin, at 23.00 hrs Western StandardTime ("WST") on 4 November 2005. As at 24.00 hrs 6 November, WST the well wasdrilling ahead at 177 metres below rotary table ("MBRT") after setting 20"conductor pipe at 137 MBRT. Flying Foam-1 is a vertical well, located in 65 metres of water, 160 kmnorthwest of Geraldton, Western Australia and 230 km northwest of the Cliff HeadOil Field. The well will test a 3D seismic-defined structure with an estimatedrecoverable reserve potential of 15 - 30 MMBO. The well is expected to reach aTotal Depth of 1,431 MBRT during the course of this week. The Flying Foam Joint Venture comprises: Equity Roc Oil (WA) Pty Ltd 37.50% (Operator) Apache Northwest Pty Limited 37.50% Arc Energy 20.0% Wandoo Petroleum Pty Ltd 5.00% Michelle Manook For further information please contact:General Manager - Corporate Affairs 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