Farm-in Agreement

Tullow Oil PLC
06 January 2006

News release



Tullow Oil Plc - Agreement to farm-in to Block 24 in Angola




6 January 2006 - Tullow Oil plc (Tullow) announces that it has concluded a
farm-in agreement with Ocean Angola Corporation, a subsidiary of Devon Energy,
to assume a 15% interest in Block 24 offshore Angola.



Block 24 is located in the Southern Kwanza Basin and is operated by Devon
Energy.  The Block is situated immediately to the west of Block 10, where Tullow
also has a 15% interest and recently participated in two wells.



Block 24 is situated in water depths of between 750 and 1,600 metres and is
covered by good quality 3D seismic. Following on from the recent wells drilled
in Block 10, the Kabetula-1 prospect was selected for drilling and was spudded
on 22 December.



The Kabetula-1 prospect, situated close to the northern and eastern boundaries
of the block, tested a Lower Miocene objective.  The well reached its total
depth of 1,818 metres on 30 December but failed to discover hydrocarbons and is
consequently being plugged and abandoned.

Commenting today, Aidan Heavey, Chief Executive of Tullow said:

'The recent exploration wells on Blocks 10 and 24 demonstrate the high risk
nature of exploration in the Southern Kwanza Basin. However, the entry into
these large Blocks, which are likely to yield further high impact prospects, is
part of a long term commitment by Tullow to building a business in Angola.
Tullow is currently in an active phase of drilling and over the next 12 months
will participate in over 20 exploration wells worldwide'.

If you have any questions on this announcement please contact:


Tullow Oil plc         Citigate Dewe Rogerson              Murray Consultants
([phone])     ([phone])                  ([phone])
                       Martin Jackson                      Joe Murray
Aidan Heavey
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
production and exploration licences in 16 countries and focuses on three core
areas: NW Europe, West 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. Tullow also has exploration programmes in
Morocco, Mauritania, Senegal, Cameroon, Uganda and Angola.

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

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