text: Niobrara Shale — The Niobrara is a two-basin play, covering substan- 
  tial portions of both the Powder River Basin of east-central Wyoming 
  and the DJ Basin of southeastern Wyoming and northeastern Colorado. 
  During 2008–10, Chesapeake acquired approximately 800,000 net lease- 
  hold acres in these two liquids-rich basins, and in early 2011 we sold 
  33.3% of our assets in the play to CNOOC for approximately $1.3 billion 