Update on Lalmai Well

Tullow Oil PLC
29 April 2004

Tullow Oil plc

29th April 2004



Tullow Oil Announces Update on Operations in Lalmai Well, Bangladesh



The Lalmai-3 exploration well in Block 9, Bangladesh, was spudded on 8th March
2004, and reached its proposed total depth of 2800m on 25th April 2004. Tullow
Bangladesh Limited, (30%), operates Block 9 with co-venturers Niko Exploration
(Block 9) Limited, a subsidiary of Niko Resources (60%), and Bangladesh
Petroleum Exploration and Production Limited, (10%).



The wireline logs have identified potential gas-bearing sands in a number of
zones between 2200m and 2800m, however it has not been possible to complete the
logging programme due to hole conditions. Subject to co-venturer approval,
Tullow will shortly begin testing these potential gas zones, including
production testing without a rig.  This will allow the rig to be moved to
Bangora, the third well in Tullow's three well exploration programme for Block
9. Production test results for Lalmai-3 are expected in three to four weeks
time.



Brian O'Cathain, Tullow's General Manager International commented, 'While these
results are encouraging, due to the difficulties encountered during the logging
programme, we have not yet demonstrated the presence of commercial gas at this
location. This will only be confirmed by a positive result from the planned
production test'.



For Further Information Contact:



Tullow Oil plc

Aidan Heavey                           ([phone])

Tom Hickey                             ([phone])

Brian O'Cathain                        ([phone])



Citigate Dewe Rogerson                 ([phone])

Martin Jackson



Murray Consultants                     ([phone])

Joe Murray



Notes for Editors



Tullow Oil plc is one of the leading Independent International Oil & Gas
Exploration and Production companies in Europe. Tullow is quoted on the London
and Irish stock exchanges (symbol TLW) and is a member of the FTSE 250 Index.



Strategy

Tullow's strategy is to build strong and secure cash flow from low risk
production acreage, while applying discretionary funds to exploration
territories with high potential. These activities will be undertaken in a manner
that reflects a genuine concern for the environment and the health and safety of
all personnel.



Production and Development Assets

Tullow has interests in over 50 exploration and production licences spread over
three core areas:  UK North Sea, West Africa and South Asia.



In the North Sea, Tullow's principal interests are in the CMS and the Thames/
Hewett group of licences and the Bacton onshore gas-processing terminal, which
it operates.



The Espoir field in Cote d'Ivoire, West Africa, is Tullow's principal source of
international production.  Tullow is also active in exploration and development
programmes in Cameroon and Gabon.



In South Asia, Tullow has production and exploration interests in Pakistan and
exploration activities in India.  In Bangladesh, a three well drilling programme
is under way in Block 9.



For further information see www.tullowoil.com




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