Old Head of Kinsale - Update

RNS Number:4056Z
EnCore Oil PLC
02 July 2007





Press Release

For immediate release: 2 July 2007



EnCore Oil plc ("EnCore" or "the Company")



      Drilling Operations Update on the Old Head of Kinsale Appraisal Well


EnCore Oil plc (LSE: EO.) today announces that the 49/23-2z sidetrack well (the
"Well") operated by Island Oil & Gas plc ("Island") on Exploration Licence 4/05
(the "Old Head of Kinsale") in the Celtic Sea offshore Ireland has successfully
tested dry gas at a rate in excess of 18 million standard cubic feet per day
through a 56/64" restricted choke size. The gas was produced from the same Upper
Wealden reservoir horizons in the Lower Cretaceous at a measured depth of 4,450
feet below the rotary table, that were encountered approximately 2.5 kilometres
to the NE in the original 49/23-1 discovery well drilled in 2006. The well is
being suspended as a potential gas producer alongside well 49/23-1.


Following a detailed technical and commercial study of the well data, the
partners will make a further announcement in due course regarding the next stage
in the evaluation and potential development of the Old Head of Kinsale gas
field.


Island is the operator of the Old Head of Kinsale gas field with a 65 per cent.
interest, Valhalla Oil and Gas Limited has a 20 per cent. interest and EnCore
holds a 15 per cent. interest.


The Petrolia Rig will shortly move to the nearby Exploration Licence 5/05 (the
Schull gas field) where it will drill the Island-operated gas appraisal well 57/
2-3.  EnCore holds a 12.5 per cent. interest in the Schull gas field with the
option to acquire an additional five per cent. from Island, subject to certain
conditions.


Alan Booth, B.Sc. in Geology and M.Sc. in Petroleum Geology and EnCore's
Managing Director, who has over 25 years' experience in the oil exploration and
production industry, has reviewed and approved the technical information
contained in this announcement.



For further information, please contact:


EnCore Oil plc                                          www.encoreoil.co.uk
Alan Booth, Chief Executive Officer                     [phone]
Eugene Whyms, Chief Financial Officer

Aquila Financial Limited                                www.aquila-financial.com
Peter Reilly                                            [phone]
Yvonne Fraser                                           [phone]

Hanson Westhouse Limited
Tim Feather                                             [phone]

KBC Peel Hunt
Jonathan Marren                                         [phone]



Notes to Editors:


EnCore Oil plc (EO.) is a UK focused exploration and production company listed
on the Alternative Investment Market (AIM) on the London Stock Exchange.


EnCore's strategy is to create shareholder value through the successful
exploration and appraisal of prospects and discoveries, and the development of
those assets through to commercial sanction or beyond.



EnCore is led by an experienced and proven management team.


EnCore holds a balanced portfolio of interests in licences with the potential
for providing major capital growth. This portfolio includes interests in the UK
Continental Shelf (UKCS) offshore, several of which include operatorship; UK
onshore in the Cleveland, Weald and Wessex basins; offshore Ireland; offshore in
the Netherlands; and offshore in the Western Sahara.


During 2007/2008 EnCore expects to participate in the drilling of at least
twelve wells in the UK.


www.encoreoil.co.uk




                      This information is provided by RNS
            The company news service from the London Stock Exchange
END

MSCOKDKKCBKDKOK