Well update

Tullow Oil PLC
27 June 2006

News release







Tullow Oil Plc - Waraga-1 Well Test Update


23 June 2006 - Hardman Resources, the operator of the Waraga-1 well test in
Uganda, in which Tullow Oil Plc (Tullow) is a 50% partner, today issued the
following press release.




               Production Testing Update: Waraga-1 Oil Discovery



Hardman confirms that the lowermost zone in Waraga-1 well was successfully
perforated at 09:00hrs on 22nd June.  The well flowed oil to surface and a
stabilised rate has been established sufficient to derive composition, flow
characteristics and key reservoir parameters.  Initial results show a flow rate
of c 1,500 bopd of 33.8 degree API oil through a 36/64' choke.  The well is now
shut in for pressure build up prior to further flow testing later today.



This lower zone will continue to be tested over the next 48 hours. Subsequently,
further flow tests will then be conducted on the two other identified
hydrocarbon bearing horizons in this well.  Testing on all three horizons at
Waraga-1 is estimated to take approximately 14 days.



Following testing at this well location, the future programme at Mputa will be
determined.  The next testing programme update is scheduled for Tuesday, 27th
June.



For further information contact:

Tullow Oil plc            Citigate Dewe Rogerson            Murray Consultants
([phone])        ([phone])                ([phone])
Tom Hickey                Martin Jackson                    Joe Murray
Angus McCoss
Chris Perry



Notes to Editors



Tullow is a leading independent oil & gas, exploration and production group,
quoted on the London and Irish Stock Exchanges (symbol: TLW) and is a
constituent of the FTSE 250 Index. The Group has interests in approximately 90
exploration and production licences in 15 countries and focuses on three core
areas: NW Europe, Africa and South Asia.



Tullow's NW Europe interests are primarily focused on gas in the UK Southern
North Sea where it has significant interests in the Caister-Murdoch System and
the Thames/Hewett areas and operates over 60% of its production.



In Africa, Tullow has production and exploration in Gabon, Cote d'Ivoire, Congo
(Brazzaville) and Equatorial Guinea and a large gas field development and
appraisal programme in Namibia. Tullow also has exploration programmes in
Mauritania, Senegal, Cameroon, Uganda, Madagascar and Angola.



In South Asia, Tullow has production and exploration interests in Pakistan and
Bangladesh and high impact exploration activities in India.

For further information please refer to our website at www.tullowoil.com

                                      ENDS




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