Activity Update: Drilling

19th Mar 2008 07:01

Roc Oil Company Limited19 March 2008 19 March 2008 ROC OIL COMPANY LIMITED ("ROC") STOCK EXCHANGE RELEASE ACTIVITY UPDATE: DRILLING 1. Block 22/12, Beibu Gulf, Offshore China Roc Oil (China) Company, a wholly owned subsidiary of ROC, advises that as at1230 hours (local time) on 14 March 2008, the Wei 6-12E-1A exploration well wasplugged and abandoned as foreshadowed in ROC's Stock Exchange Release dated 11March 2008. The review referred to in ROC's Stock Exchange Release dated 11 March 2008 hasbeen completed. For a variety of operational reasons, the Joint Venture hasdecided not to drill the Wei-12-2N-1 well as part of the current drillingprogramme. Participating Interests in the Block 22/12 Joint Venture are: Roc Oil (China) Company (Operator).........................40% Horizon Oil Limited........................................30% Petsec Petroleum*..........................................25% Oil Australia Pty Ltd**.....................................5% The above interests are subject to Government participation in developments of up to 51% *a subsidiary of Petsec Energy Ltd **a subsidiary of First Australian Resources 2. WA-286-P, Perth Basin, Offshore Western Australia Roc Oil (WA) Pty Limited, a wholly owned subsidiary of ROC, advises that as at0600 hours (local time) on 19 March 2008, the Premium "WilCraft" jack-updrilling rig was still waiting on weather prior to moving to Dunsborough-2, 26kilometres to the north. Participating Interests in the WA-286-P Joint Venture are: Roc Oil (WA) Pty Limited (Operator)........................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% 3. PSC Area C, Block 6, Offshore Mauritania Roc Oil (Mauritania) Company, a wholly owned subsidiary of ROC, advises that asat 0600 hours (local time) on 18 March 2008, the Khop-1 exploration well hasbeen drilled to a depth of 4,158 mBRT. The forward programme is to continue to drill to the planned Total Depth of4,320 mBRT. The Khop-1 exploration well is located approximately 70 kilometres from theMauritanian coast. Participating Interests in the PSC Area C, Block 6 Joint Venture are: Roc Oil (Mauritania) Company................................5.000% PC Mauritania I Pty Ltd (Operator).........................37.578% Petronas Carigali Overseas Sdn Bhd.........................35.000% Tullow Oil plc.............................................22.422% 4. Blane Oil Field, North Sea Roc Oil (GB) Limited, a wholly owned subsidiary of ROC, advises that as at 0600hours (local time) on 17 March 2008, the "Ocean Princess" rig was preparing tosidetrack the 30/3a-3 water injection well, consistent with the originaldrilling programme. Unitised Interests in the Blane Oil Field are: Roc Oil (GB) Limited.......................................12.5% Talisman Energy (UK) Limited...............................25.0% Talisman Energy Norge AS...................................18.0% MOC Exploration (UK) Limited (a subsidiary of Nippon Oil Corporation)....................................14.0% ENI UK Limited.............................................13.9% ENI ULX Limited.............................................4.1% Bow Valley Petroleum (UK) Limited..........................12.5% Damian FisherGeneral ManagerExternal Affairs & Investor Relations For further information please contact: Dr John Doran on Tel: +61-2-8356-2000 Fax: +61-2-9380-2635 Email: [email protected] 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: [email protected] 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: [email protected] 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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