Well Test Update

Tullow Oil PLC
07 November 2006

News release


Tullow Oil Plc - drilling update - Nzizi well


7 November 2006 - Hardman Resources, today issued the following drilling update
on the Nzizi Exploration/Appraisal well in Uganda in which Tullow is a 50%
partner.


Hardman Resources Limited ('Hardman') provides the following update on its
drilling activities:


         UGANDA: Exploration Area 2 Nzizi-1 Exploration/Appraisal Well



At 2:00pm on 3 November 2006, the Nzizi-1 well was spudded in Exploration Area
2, Uganda, using the Eagle Drill-1 rig.



The well has been drilled to a depth of 358 metres in the 9 7/8 inch section and
casing has been run. As at midnight 5 November, the operation was preparing to
set the blow out preventer (BOP), following which the well will be drilled ahead
to total depth of 1,030 metres.



Nzizi-1 will test a structure up-dip of the recent Mputa discovery. The well is
designed to evaluate the equivalent oil bearing reservoirs intersected in the
Mputa structure. Nzizi-1 is situated approximately 5.5 kilometres to the
southwest of Mputa-2 appraisal well.



Equities in Block 2 are:
                                                         Exploration Area 2
Hardman Petroleum Africa Pty Ltd (Operator)                       50.0%
Tullow Oil plc                                                    50.0%


Times and dates for Ugandan wells refer to UTC/GMT +3 hours (Uganda time), 5
hours behind Western Standard Time, Perth. All reported depths are referenced to
the rig rotary table (RT). Hydrocarbon shows will be only be reported after all
required logs have been run and evaluated, although Hardman will release weekly
updates on the exploration drilling campaign.




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




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