Greater Sierra

At our Greater Sierra resource play in northeast British Columbia, we are focused on the continued development of the Jean Marie geological formation and on the successful completion of the commercial pilot program in the Horn River Basin.

Using multi-leg, horizontal drilling technology we have developed approximately 30 percent of our two million net acres in the Jean Marie formation.

At the end of 2011, we had approximately 288,000 net acres in the Devonian shale formation of the Horn River. The Horn River formation shale's (Muskwa, Otter Park and Evie) in our focus area are up to 500 feet thick. As of December 31, 2011 these shales have been evaluated with 112 gross wells, 70 of which have been placed on long-term production (1 vertical and 69 horizontal).

In 2011 we drilled approximately 34 net wells in our Greater Sierra resource play.

Cabin Gas Plant construction and commissioning deferred

On October 22, 2012, in consultation with the owners and gas suppliers to the Cabin Gas Plant, Encana and its partners announced the deferral of further construction on phase two of the Cabin Gas Plant Projects, known as Cabin Gas Plant 2, and the deferral of further commissioning activities on Cabin Gas Plant 1, in the Horn River Basin in northeastern British Columbia.

Operatorship transition of the Cabin Gas Plants to Enbridge has been deferred until at least the second quarter of 2013.

Greater Sierra production (MMcfe/d)

2005	2006	2007	2008	2009	2010	2011
223	218	216	226	204	236	266