Well Test Update

Tullow Oil PLC
15 August 2006

News release



Tullow Oil Plc - Mputa Well Update


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


Uganda: Mputa-1 flow test update - Block 2


On 12 August 2006, oil was successfully flowed to surface from the sands tested
from DST #2 in the Mputa-1 exploration well, yielding an average flow rate of
300 barrels of oil per day of 32degrees API oil through a 32/64' choke, with no
water production and low gas to oil ratio.


The sand tested by DST#2 is a relatively thin interval (2 - 3 metres), which
gave an indication of hydrocarbons whilst drilling but did not yield definitive
wireline pressure testing results during the original drilling operation. The
gravity of the recovered oil is very similar to that seen in the lower zones at
the Waraga-1 well 19 kilometres away which is likely to be of similar origin.


Final flow and build-up tests are currently being concluded after which the main
oil-saturated sand in the discovery well (965 to 975m interval) will be tested
by DST#3. Testing of this final interval is anticipated to commence later this
week.


The Mputa-1 well is located 220 kilometres northwest of the Ugandan capital
Kampala and onshore 8 kilometres from Lake Albert.  The Waraga-1 well is located
19 kilometres to the northeast.


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



Times and dates for Ugandan wells refer to Uganda time (GMT +3 hours)


For further information contact:

Tullow Oil plc            Citigate Dewe Rogerson           Murray Consultants
([phone])        ([phone])               ([phone])
Tom Hickey                George Cazenove                  Joe Murray
Angus McCoss



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


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