Roc Oil Company Limited 30 January 2006 30 January 2006 ROC OIL COMPANY LIMITED ("ROC") STOCK EXCHANGE RELEASE MAURITANIA OFFSHORE DRILLING UPDATE DORE-1 EXPLORATION WELL ROC advises that further to the last report issued on 24 January 2006, the Dore-1 exploration well in PSC B (ROC: 3.693%) reached a total depth of 2,266 metres. Analysis of the wireline and drill data indicates that the well has not encountered any significant hydrocarbons and as a result, the well is currently being plugged and abandoned. This concludes the 2005 Mauritanian drilling programme and the Stena Tay rig will now be released. The Atwood Hunter is scheduled to commence the 2006 Mauritanian exploration programme in 2Q 2006. 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