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Ebony-1 spudded on 22 October and reached a total depth of 2,640 metres. The well lies in the south-west part of the Shallow Water Tano block in 86 metres of water and is the second commitment well in this licence.

Successful logging and sampling operations have confirmed a four metre oil bearing interval at 2,053 metres and a two metre high-pressure gas-condensate interval at 2,570 metres.

Log and sample data from the high-pressure gas-condensate sands and a regional seismic interpretation, indicate there may be a connection between these pinched-out sands and the material down-dip Tweneboa oil prospect which lies mainly in the Deepwater Tano licence. Other possible interpretations for the high-pressure cannot however be excluded at this stage, and this is subject to ongoing evaluation.

Tullow (31.5%) operates the Shallow Water Tano licence on behalf of partners Interoil (31.5%), Al Thani (22.5%), Sabre Oil and Gas (4.5% carried) and GNPC (10% carried).

Commenting today, Aidan Heavey, Chief Executive, said:

“The current interpretation of the Ebony-1 result is extremely encouraging as it further de-risks the regional prospectivity and improves our overall understanding of the hydrocarbon distribution in the basin. This has potentially positive implications for the Tweneboa stratigraphic trap prospect, which is scheduled for drilling in the first quarter of 2009.”

Contacts

Tullow Investor Relations Camarco (Media)

ir@tullowoil.com
Matthew Evans

(+44 20 3757 4980)
Billy Clegg
Georgia Edmonds
Rebecca Waterworth

Notes to editors

Tullow is an independent energy company that is building a better future through responsible oil and gas development in Africa. Tullow's operations are focused on its core producing assets in Ghana. Tullow is committed to becoming Net Zero on its Scope 1 and 2 emissions by 2030, with a Shared Prosperity strategy that delivers lasting socio-economic benefits for its host nations. The Group is quoted on the London and Ghanaian stock exchanges (symbol: TLW). For further information, please refer to: www.tullowoil.com.

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