"We're drilling down to 4,000 metres in the Deep Basin in 20 days now. That would have taken a couple of months just a year ago," Graham responds. The time saved has lowered cost dramatically. In 2006, EnCana averaged $4.1 million to drill a well at its Big Horn play, which fell to $3 million in 2007 and $2.2 million last year.

Interesting, just a year can cut the drilling time by 2/3. I guess it is true, that practice makes perfect :)