Tullow Oil PLC Twiga South-1 Oil Discovery (9627R)

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RNS Number : 9627R

Tullow Oil PLC

26 November 2012

News Release

Twiga South-1 Oil Discovery

26 November 2012 - Tullow Oil plc (Tullow) announces that the Twiga South-1 exploration well in Block 13T, onshore Kenya, has encountered 30 metres of net oil pay with further potential to be assessed on test and has also encountered a tight fractured rock section with hydrocarbon shows over a gross interval of 796 metres.

Twiga South-1 has been drilled to a total depth of 3,250 metres and has been successfully logged and sampled. Three sandstone reservoir zones, analogous to Ngamia-1, were encountered and moveable oil, with an API greater than 30 degrees, has been recovered to surface. Further potential exists up dip of the well and will be subsequently appraised.

In addition to the net pay, the well also penetrated a thick section of tight fractured rock below 2,272 metres which had extensive hydrocarbon shows over a gross interval of 796 metres. Moveable oil with an API greater than 30 degrees was also successfully sampled from this section. This tight fractured rock section is a new play-type for the region that will require further evaluation to understand its extent and any productive potential.

The Twiga South structure is the second prospect to be tested in the Lokichar Basin as part of a multi-well drilling campaign in Kenya and Ethiopia and is the first oil discovery in Block 13T. It is located 22km to the north of the Ngamia-1A discovery and further de-risks a number of other similar features on the western margin of the basin.

A series of flow tests will now be conducted on the well over the next 4-8 weeks. Following completion of the testing programme, the rig will move back to flow test the Ngamia-1 well.

Elsewhere in Tullow's East African Rift basin acreage, a result from the Paipai-1 well in Block 10A in Kenya is expected by the end of the year and the Sabisa-1 well in the South Omo Block in Ethiopia is expected to commence drilling by the end of December.

Tullow has a 50% operated interest in the Twiga South-1 well with Africa Oil holding the remaining 50% interest.

Angus McCoss, Exploration Director, commented,

"Following the basin-opening Ngamia-1 well result earlier this year, I am pleased to announce that our second well in our onshore Kenya rift basins campaign has also discovered oil. This immediate follow on discovery reaffirms the considerable prospectivity of the Lokichar Basin. Having significantly expanded our plans in Kenya and Ethiopia, there is much to look forward to as the exploration campaign and testing programme move ahead."

FOR FURTHER INFORMATION CONTACT:

 
 Tullow Oil plc             Citigate Dewe Rogerson   Murray Consultants 
  ([phone])         ([phone])       ([phone]) 
  Chris Perry - Investor     Martin Jackson           Joe Murray 
  Relations                  Jack Rich                Ed Micheau 
  James Arnold - Investor 
  Relations 
  George Cazenove - Media 
  Relations 
=========================  =======================  =================== 
 

Notes to Editors

Tullow is a leading independent oil & gas, exploration and production group, quoted on the London, Irish and Ghanaian (symbol: TLW) stock exchanges and is a constituent of the FTSE 100 Index. The Group has interests in over 100 exploration and production licences across 24 countries and focuses on four core areas: Africa, Europe, South Asia and South America.

For further information please refer to our website at www.tullowoil.com.

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This information is provided by RNS

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