Well Test Update

Tullow Oil PLC
14 November 2006


News release


Tullow Oil plc - Nzizi-1 Exploration Well Update


13 November 2006 -Hardman Resources, the operator of the Nzizi-1 exploration
well in Uganda, in which Tullow Oil plc (Tullow) is a 50% partner, today issued
the following press release.


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


Since Hardman's last report, Nzizi-1 has been drilled to a total depth of 1,065
metres in a 6 3/4' hole.  As at midnight on 13 November, wireline logs were
being run after having encountered oil shows across the target intervals.


Nzizi-1 is testing a structure up-dip of the Mputa discovery and was 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. Hydrocarbon shows will 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
Chris Perry


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 across 17 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 exploration and production 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, Congo (DRC), Madagascar, Angola and
Ghana.


In South Asia, Tullow has exploration and production 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