Last month, Denbury closed on its $1.05 billion acquisition of some Montana and North Dakota properties from ConocoPhillips (COP), a deal that Denbury expects will enhance its focus on carbon dioxide-enhanced recovery, a method used to increase the amount of oil that can be produced from aging fields. The deal was funded partly with proceeds from the sale of Denbury assets in what is known as the Bakken Shale to Exxon Mobil Corp. XOM in exchange for $1.6 billion in cash and interests in two oil fields.