Origin Issues Update on Redback South 1

Origin Energy, on behalf of the L11 Joint Venture parties, on Thursday advised that the Weatherford drilling rig 826 is currently drilling the Redback South 1 exploration well. This well is being drilled as a sidetrack from the Redback 1 wellbore. Drilling in the sidetrack hole commenced on 25 August at a depth of 2007mMD.

At 0600 hours Western Standard Time today, the borehole had reached 2438mMD and drilling was progressing.

Well type and location

Gas exploration well, Redback South prospect, North Perth Basin, Western Australia (L11 / EP 320).

Redback South 1 is being drilled as a directional well to intersect the reservoir interval approximately 570 meters SSE of the Redback 1 location at a vertical depth of 3,685 meters sub-sea. The major fault compartment being targeted by this well is on the downthrown side of a fault immediately south of the Redback 1 well, with closure independent of the Redback 1 structure.


Surface location
Latitude:	29° 27' 28.05" S
Longitude:	115° 09' 43.51" E
Target location
Latitude:	29° 27' 43.218" S
Longitude:	115° 09' 50.219" E

Initial Interests
Origin Energy Developments Pty Limited*	67.00%
ARC (Beharra Springs) Pty Ltd**	33.00%