DrillingReport: OffshoreChina

Roc Oil Company Limited 29 January 2008 29 January 2008 ROC OIL COMPANY LIMITED ('ROC') STOCK EXCHANGE RELEASE DRILLING UPDATE: WEI 6-12W-1 EXPLORATION WELL, BLOCK 22/12, OFFSHORE CHINA Roc Oil (China) Company, a wholly owned subsidiary of ROC, advises that since its last Stock Exchange Release on 23 January 2008, the Wei 6-12W-1 exploration well in Block 22/12 in the Beibu Gulf, offshore China, has drilled to a Total Depth of 2,333 mBRT and wireline logging has been completed. Drilling and log data indicate that Wei 6-12W-1 well has not encountered any hydrocarbons and the well has been plugged and abandoned. Later this week, the Premium 'Murmanskaya' jack-up drilling rig will commence drilling Wei 6-12E-1, the second well in the three well drilling programme, which will test a structural-stratigraphic prospect 1.7 kilometres east of the Wei 6-12S-1 oil discovery. Commenting on the Wei-6-12W-1 drilling results, Dr John Doran, ROC's Chief Executive Officer, stated that: 'As stated at the beginning of the well, although stratigraphic traps can offer high reward they invariably carry increased risk. In this case, the risk won over the reward.' Participating Interests in the Block 22/12 Joint Venture are: Roc Oil (China) Company..................................... 40% (Operator) 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 In accordance with ASX and AIM Rules, the information in this Release has been reviewed and approved by Dr John Doran, Chief Executive Officer, Roc Oil Company Limited, BSc (Hons) Geology, MSc and PhD. Dr Doran, who is a member of the Society of Petroleum Engineers, has more than 30 years relevant experience within the industry and consents to the information in the form and context in which it appears. Damian Fisher General Manager External Affairs & Investor Relations For further information please 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)20 7495 5707/+61 (0)2 8356 2000 Mob: +44 (0)7751 3671 49/+61 (0)417 261 727 Email: khird@rocoil.com.au 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: bobbym@buchanan.uk.com 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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