Drilling Update

Exillon Energy

18 May 2011

Drilling Update

Exillon Energy plc ("Exillon Energy", the "Company" or the "Group") (EXI.LN), a British listed independent oil producer with assets in two oil-rich regions of northern Russia, Timan-Pechora ("Exillon TP") and West Siberia ("Exillon WS"), is pleased to announce that well EWS I - 20 successfully found oil on the eastern part of the EWS I field

EWS I - 20

EWS I - 20 well which was spudded on 13 April 2011 was drilled in 24 days on an eastern part of the EWS I field on a turn-key contract.

The well flowed water-free oil naturally to the surface with a flow rate of 625 bbl/day on an 8 mm choke. The well encountered the Jurassic P reservoir at 1,809 meters, confirming 14.6 meters of effective net oil pay within the Jurassic.

The well was drilled directionally 0.9 km to the north-west from the existing well pad. On completion of testing the well will be connected up to existing production facilities.

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