Appraisal Well Update

Tullow Oil PLC
30 April 2008

News release


Tullow Oil plc - Banda NW appraisal well update


30 April 2008 - ROC Oil, a participant in the Banda NW exploration well, in
which Tullow Oil plc (Tullow) is also a partner, today issued the following
press release. A detailed update on the well result and the forward programme
will be provided once well operations have been completed.



ROC OIL WEEKLY DRILLING REPORT


Offshore Mauritania


Roc Oil (Mauritania) Company, a wholly owned subsidiary of ROC, advises that as
at 0100 hours (local time) on 28 April 2008, the Banda NW ST-1 sidetrack well,
had reached a Total Depth of 2,934 mBRT and wireline logs, including sampling
and pressure measurement tools, were being run.

Preliminary logging results indicate that the well has encountered oil and gas
columns with contacts similar to those seen in the discovery well, approximately
2 kilometres to the east.


Participating Interests in the PSC Area B Joint Venture are:


ROC Group Companies..........................3.693%

PC Mauritania I Pty Ltd (Operator)...........53.846%

Tullow Oil
plc..........................................21.600%

Mauritania Holdings
B.V..........................................11.630%

Premier Oil Mauritania B Limited............. 9.231%





For further information contact:
Tullow Oil plc                     Citigate Dewe Rogerson              Murray Consultants
([phone])                 ([phone])                  ([phone])
Aidan Heavey                        Martin Jackson                      Joe Murray
Tom Hickey                          Kate Delahunty
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 100 Index. The Group has interests in over 100
exploration and production licences across 23 countries and focuses on four core
areas: Europe, Africa, South Asia and South America.



Tullow's European 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 70% of its production.



In Africa, Tullow has exploration and production in Gabon, Cote d'Ivoire,
Mauritania and Equatorial Guinea and two large appraisal and development
programmes in Ghana and Uganda. Tullow also has exploration interests in
Mauritania, Senegal, Congo (DRC), Tanzania, Madagascar, Namibia and Angola.



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



In South America Tullow has high impact exploration interests in Trinidad and
Tobago, French Guiana and Suriname.

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