Mauritania Drilling Update

Roc Oil Company Limited 08 October 2004 Roc Oil Company Limited 8 October 2004 ROC OIL COMPANY LIMITED ('ROC') STOCK EXCHANGE RELEASE MAURITANIA OFFSHORE DRILLING UPDATE ROC advises that the following release was made this afternoon by Woodside Petroleum Limited: 'Woodside Mauritania Pty Ltd, a wholly-owned subsidiary of Woodside Petroleum Ltd., reports the following activity offshore Mauritania since the last report issued on 5 October 2004. PSC-B, Block 4 Tiof-3 and Tevet-1 Tiof-3 Appraisal Well Evaluation of logs acquired while drilling and wireline logging operations, including fluid sampling and downhole pressure measurements, has established that the well intersected a gross oil column of 134 metres, containing several individual sands of variable thickness. The result was in line with pre-drill expectations. The current operation is preparing to sidetrack, core and test the well as planned. Tevet-1 Exploration well Evaluation of wireline logs, including fluid sampling and downhole pressure measurements, has established that the well intersected a gross gas column of approximately 70m above a gross oil column of approximately 44m. The well was drilled at a location to intersect the predicted fluid contacts. The top reservoir, gas-oil contact and oil-water contact were encountered at their predicted pre-drill depths. The Tevet-1 discovery is located within tie-back distance to the Chinguetti field which is currently being developed. The current operation was plugging and abandoning the well as planned. The locations of the Chinguetti Oil Field, the Tiof and Banda discoveries and exploration wells to be drilled early in the 2004-05 drilling campaign are shown on the attached map.* Wells are expected to be drilled in three production sharing contract areas during the campaign.' Participating Interests in those areas are: +-------------------------------------+-----------+----------+----------+ | Company | PSC-A | PSC-B | PSC-C2 | +-------------------------------------+-----------+----------+----------+ |Woodside group companies (Operator) | 53.846% | 53.846% | 48% | +-------------------------------------+-----------+----------+----------+ |Hardman group companies | 24.3% | 21.6% | 28.8% | +-------------------------------------+-----------+----------+----------+ |BG group companies | 13.084% | 11.63% | -- | +-------------------------------------+-----------+----------+----------+ |Premier group companies | -- | 9.231% | -- | +-------------------------------------+-----------+----------+----------+ |Fusion group companies | 4. 615% | -- | -- | +-------------------------------------+-----------+----------+----------+ |Roc Oil group companies | 4.155% | 3.693% | 3.2% | +-------------------------------------+-----------+----------+----------+ |Energy Africa | -- | -- | 20% | +-------------------------------------+-----------+----------+----------+ John Doran, Chief Executive Officer of ROC commented that: 'ROC considers this to be an excellent start to the Mauritanian drilling campaign. However, the Company recognises that it is easy to be encouraged whenever you encounter thick gross hydrocarbon columns. Until the Joint Venture has finalised its evaluation of net oil pay in the Tiof-3 and Tevet-1 wells and acquired more subsurface data from both fields, it would be premature to draw any commercial conclusions.' *Map attached to the copy of this release on ROC's website (http://www.rocoil.com.au/Pages/ASX_Releases/asx-releases.html) Bruce Clement For further information please contact: Chief Operating Officer Dr John Doran on Tel: +61-2-8356-2000 Fax: +61-2-9380-2635 E-mail: 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 Ann-Marie Wilson/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
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