http://www.fool.com/investing/2016/08/25/the-5-companies-dominating-the-niobrara-shale-play.aspx
Another interesting article about the DJ basin, I note that Devon Energy spent $600 mil to acquire 253,000 acres, $2371/acre.
With a MC of $8 mil AKK acreage (15282) acres valuation represents $523/acre