Roc Oil Company Limited 10 January 2006 10 January 2006 ROC OIL COMPANY LIMITED ("ROC") STOCK EXCHANGE RELEASE MAURITANIA OFFSHORE DRILLING UPDATE ROC advises that the following release was made earlier today by Woodside Petroleum Ltd: "Woodside Petroleum Ltd. reports the following activity by its wholly-owned subsidiaries Woodside Mauritania Pty. Ltd. and WEL Mauritania B.V. offshore Mauritania since the last report issued on 3 January 2006. PSC Area C, Block 6: Zoule-1 Exploration Well The 'Stena Tay' drill rig drilled the Zoule-1 exploration well to the final total depth of 3,730 metres. At midnight on 9 January 2006, preparations were underway to commence wireline logging operations. The well will then be plugged and abandoned as planned. Following the Zoule-1 well the Stena Tay will then drill the Dore exploration well located in PSC Area B. General All reported drilling depths are referenced to the rig rotary table and all times are Universal Time (UTC) (Mauritanian time). The locations of planned exploration wells and the Chinguetti Oil Field are shown on the attached map." Participating Interests in the Chinguetti Joint Venture and relevant PSC areas are: +-----------------------+----------+-----------+---------+-----------+ | Company |Chinguetti| PSC-A | PSC-B | PSC-C, | | | Joint | | | Block 6 | | | Venture | | | | +-----------------------+----------+-----------+---------+-----------+ |Woodside group |47.38448% | 53.846% | 53.846% | 37.578% | |companies (Operator) | | | | | +-----------------------+----------+-----------+---------+-----------+ |Hardman group companies|19.00800% | 24.3% | 21.6% | 22.422% | +-----------------------+----------+-----------+---------+-----------+ |Societe Mauritanienne |12.00000% | -- | -- | -- | |des Hydrocarbures | | | | | |(formerly GPC) | | | | | +-----------------------+----------+-----------+---------+-----------+ |BG group companies |10.23440% | 13.084% | 11.63% | -- | +-----------------------+----------+-----------+---------+-----------+ |Premier group companies| 8.12328% | -- | 9.231% | -- | +-----------------------+----------+-----------+---------+-----------+ |Roc Oil group companies| 3.24984% | 4.155% | 3.693% | 5.0% | +-----------------------+----------+-----------+---------+-----------+ |Fusion group companies | -- | 4. 615% | -- | -- | +-----------------------+----------+-----------+---------+-----------+ |Petronas Carigali | -- | -- | -- | 35.0% | |Overseas Sdn Bhd | | | | | +-----------------------+----------+-----------+---------+-----------+ (*Map attached to copy release on ROC's Website: http://www.rocoil.com.au/Pages/ASX_Releases/2006_Releases/January-2006.html Michelle Manook For further information please General Manager - Corporate Affairs 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 7936 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