Kingfisher 1A Well, Uganda

Tullow Oil PLC
15 January 2007

News release




Tullow Oil Plc - Kingfisher Well Update - Uganda


15 January  2007 - Heritage Oil, the operator of the Kingfisher-1 exploration
well in Uganda, in which Tullow Oil plc ('Tullow') is a 50% partner, today
issued the following press release:


HERITAGE OIL ENCOUNTERS HYDROCARBONS IN KINGFISHER-1A WELL IN UGANDA


Heritage Oil Corporation (TSX: HOC) today announced that  hydrocarbons in three
zones totalling approximately 40 metres have been encountered in the
Kingfisher-1A well in Block 3A, Uganda.


As reported on November 6, 2006, a secondary objective of the Kingfisher-1 well
successfully flow tested 4,120 barrels of oil per day from two zones perforated
over an interval between 1,783 and 1,795 metres. The oil was light (c. 30degrees
API) and sweet with a low gas-oil ratio and some associated wax.


Following the encouraging result in the secondary objective of the Kingfisher-1
well, the partners commenced drilling the Kingfisher-1A sidetrack, which aimed
to step-out into the basin to test the primary exploration objectives of the
well and penetrate as much of the deeper sedimentary section as possible to a
maximum depth of 4,000 metres. Since the last report, the Kingfisher-1A well has
been successfully cased to 2,502 metres and drilled to a depth of 2,962 metres.


New drilling in the deeper section has encountered three additional potential
oil-bearing zones totalling approximately 40 metres between 2,260 and 2,370
metres, evidenced by wireline logging and formation pressure testing. Planned
testing of these zones will follow completion of drilling, to a target depth of
between 3,000 and 4,000 metres, which it is estimated will take up to a further
45 days. Test equipment has remained on site in readiness for the testing.


The Kingfisher prospect is a very large structural high that is expressed at
surface on the bed of Lake Albert. Seismic data indicates the Kingfisher
prospect has an areal extent of up to approximately 70 square kilometres,
although the Kingfisher-1A well is only investigating a limited part of this
structure.


As part of an accelerated work program in Uganda, the joint venture partners are
planning to acquire approximately 270 square kilometres of 3D seismic over the
Kingfisher structure commencing in the first half of 2007. Options for further
drilling of the Kingfisher prospect and other prospects in Lake Albert are being
appraised.


Heritage is operator of and holds a 50% interest in Block 3A, which has an area
of 1991 square kilometres. Heritage is also operator of and holds a 50% interest
in Block 1, which has an area of 4,285 square kilometres and is located to the
north of Block 3A in the Albert Basin. Tullow holds the other 50% interests in
Blocks 3A and 1.

For further information contact:
Tullow Oil plc                Citigate Dewe Rogerson         Murray Consultants
([phone])            ([phone])             ([phone])
Tom Hickey                    Martin Jackson                 Joe Murray
Angus Mc Coss
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 over 100
exploration and production licences across over 20 countries and focuses on
three principal 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), Mauritania 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),Tanzania,
Madagascar, Angola and Ghana.


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


Following the recently completed acquisition of Hardman Resources Limited,
Tullow also has high impact exploration interests in French Guyana, Surinam and
the Falkland Islands.


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                 BTBR