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Summary

Exploration Well in Central North Sea

Santos Ltd advises that the UK Block 22/22c-3 well, 128 miles east of Aberdeen, has been suspended pending further evaluation following oil shows.

The original wellbore, 22/22c-3, was drilled by the semi-submersible drilling rig Sedco Explorer in 307 feet of water to a total depth of 9,235 feet. The well encountered shows of hydrocarbons in Tertiary aged, Tay Formation sandstones.

Well 22/22c-3z was then drilled as a geological sidetrack to the west-northwest to a total measured depth of 9,939 feet. The well encountered an oil zone in the Tay sandstone objective. The well was not tested and has been temporarily suspended, pending future evaluation.

The participants in Block 22/22c are: Marathon Oil U.K. Ltd, Operator (53.336 percent), Pan Canadian North Sea Limited (20 percent), Santos Europe Limited (13.336 percent), Oranje Nassau Petroleum Search B.V. (8.888 percent) and Edinburgh Oil & Gas PLC (4.44 percent).