Well Update

Regal Petroleum PLC 13 December 2007 -------------------------------------------------------------------------------- Immediate Release 13 December 2007 REGAL PETROLEUM PLC ('Regal' or 'the Company') Well Testing on Gas Discovery and Well Spud in Romania The Company is pleased to announce that initial flow testing of its first exploration well, RBN-4, in the Barlad Concession in Romania, where the Company holds a 100% working interest, has resulted in a maximum flow rate of dry gas at a rate of 3.74 MMscf/d on a 12mm choke with a flowing tubing head pressure of 49 bar over a 24 hour flow period. A 4.6 metre interval, between 756.7 metres and 761.3 metres, was perforated and tested and there was minimal water production in the test. This interval is the first of two intervals to be tested on this well and operations are continuing in preparation for the flow testing of a second interval with a planned perforated interval of 12.7 metres between 543.3 metres and 556.0 metres. Further results will be provided once this testing has been completed in due course. The RBN-4 well was completed to a total depth of 973 metres TVD into the Sarmatian formation. The well was logged and the presence of gas was detected within zones in the Sarmatian formation. In addition the Company has spudded its second planned exploration well, RBN-3, on the Barlad Concession. This well is located approximately 5 kilometres to the northwest of the RBN-4 well and is also intended to evaluate a Sarmatian formation gas prospect. The well is estimated to take approximately 20 days to drill at a cost of approximately US$1.1 million. David J Greer, Regal's Chairman and Chief Executive Officer, commented: 'This initial test of the first zone of the RBN-4 well is very encouraging and the flow rates achieved are in excess of those expected. This is an area where it is relatively inexpensive to drill wells and connect them up to existing infrastructure for gas sales. The two locations chosen for the RBN-3 and RBN-4 wells were only two prospects identified from several possible leads. Regal will now use the results from this well to better understand the potential for other prospects and leads in the Concession. We look forward to the test results on the second zone of the RBN-4 well and the successful drilling of the RBN-3 well.' For further information, please contact: Regal Tel: 020 7408 9500 David J Greer, Chairman & Chief Executive Officer Evolution Securities Tel: 020 7071 4300 Robert Collins Mirabaud Securities Tel: 020 7321 2508 Pav Sanghera Definitions: bar one atmosphere pressure mm millimetres MMscf/d million standard cubic feet per day TVD true vertical depth In accordance with the guidelines of the AIM market of the London Stock Exchange, Roland Barbullushi, PhD Geological Sciences, AAPG, SPE, PESGB, Consultant to Regal Petroleum plc, is the qualified person that has reviewed the technical information contained in this press release. This information is provided by RNS The company news service from the London Stock Exchange
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