The following operational update relates to Cairn's exploration drilling campaign offshore Greenland.

Delta-1 Well: Napariaq Block, West Disko Area The Delta-1 exploration well, drilled by the Leiv Eiriksson semisubmersible drilling rig, located in a water depth of 293 meters (m) and approximately 365 kilometers (km) offshore Aasiaat, in the Napariaq Block is being plugged and abandoned. The Delta-1 well which was targeting the Cretaceous Section beneath the Tertiary volcanic, reached Total Depth (TD) at 2,977m still within Tertiary volcanics without encountering hydrocarbon shows.

AT2-1 Well: Atammik Block, South Ungava Area The Ocean Rig Corcovado has moved 597km south from the Eqqua Block, to the Atammik Block, and has commenced drilling the AT2-1 well, located in a water depth of 1,045m and approximately 198km offshore Nuuk, as a fifth well in the 2011 exploration drilling campaign.

AT7-1 Well: Atammik Block, South Ungava Area The Leiv Eiriksson will move south shortly and will start operations to re-enter the AT7-1 well in the Atammik block, located in 909m of water and 198km offshore Nuuk, and drill to the planned TD. This well was temporarily suspended to allow the Leiv Eiriksson to drill the Delta-1 well to optimize the drilling time in the West Disko area.

Tags: Cairn Energy PLC