Drilling Update

RNS Number : 7405Y

Tullow Oil PLC

10 July 2008

 



Positive second reservoir test from Mahogany-2 well, offshore Ghana

10 July 2008 - Tullow Oil plc ('Tullow') is pleased to announce results of a second successful flow test on the Mahogany-2 appraisal well, which is part of the Jubilee field offshore Ghana.

In June this year the Lower Mahogany reservoir was successfully tested over a 17-metre interval. Following completion of this test, partners took the decision to perform a second flow test - this time on the Upper Mahogany reservoir. 

This latest test was conducted over a 23-metre perforated interval, representing approximately 40% of the oil-bearing pay of the Upper Mahogany reservoir. The interval flowed at a rate of 4,448 bopd of 39˚API oil and approximately 5.1 mmscfd of associated natural gas on a 36/64-inch choke.

In both tests, the reported flow rates were restricted by both equipment and facilities. These test results have provided important additional reservoir data in respect of this previously untested interval and confirm that Jubilee production wells should be capable of flowing at rates in excess of 20,000 bopd when completed with 5 ½-inch tubing. 

Commenting today, Aidan Heavey, Chief Executive, said:

'The result of the second test on Mahogany-2 continues to demonstrate the high quality of the Jubilee field and supports the partners' fast track development approach. Allied to encouraging progress on development planning, facilities tendering and gas commercialisation this latest result means that plans to sanction the development of the Jubilee field later in 2008 remain firmly on schedule.'

FOR FURTHER INFORMATION CONTACT:

Tullow Oil plc  ([phone]) Aidan Heavey Tom Hickey Chris Perry

Citigate Dewe Rogerson  ([phone])  Martin Jackson George Cazenove

Murray Consultants  ([phone])  Joe Murray  Ed Micheau

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. The company also has interests offshore the Netherlands and Portugal.

In Africa, Tullow has exploration and production in Gabon, Côte 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.

 

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