Domestic oil and natural gas exploration and production company Synergy Resources Corp. (NYSE Mkt: SYRG) filed a mixed shelf for common stock, preferred stock, convertible preferred stock, rights and warrants for an initial price offering not to exceed $250 million.

PEDEVCO Corp., d/b/a Pacific Energy Development, has released test results from its second horizontal well, the Waves 1H well, located in Weld County, Colorado, prospective for the Niobrara formation.

Tulsa, OK-based oil and gas exploration and production company WPX Energy said January 22 that a recent Niobrara gas discovery in western Colorado has the potential more than double the company’s current 18 trillion cubic feet equivalent of 3P reserves.

Denver, CO-based Emerald Oil Inc. has executed an agreement to sell its interests in approximately 30,902 net mineral acres in the Sand Wash Basin to a private oil and gas company for approximately $10 million cash at $325 per acre.

Fort Worth, TX-based oil and gas company Quicksilver Resources Inc. has closed its previously-announced Sand Wash Basin acquisition and exploration agreement with SWEPI LP, a subsidiary of Royal Dutch Shell plc.

Denver, CO-based oil exploration and production company Emerald Oil Inc. has appointed David Veltri as COO.

Denver, CO-based independent oil and gas exploration and production company Emerald Oil Inc. has closed on a senior credit facility with Wells Fargo Bank NA.

Denver-based Recovery Energy Inc., an independent oil and gas exploration and production company with operations and assets in the Denver-Julesburg (DJ) Basin, has appointed W. Phillip Marcum to the position of chairman of the board and CEO and A. Bradley Gabbard to the position of president.

Armada Oil Inc., an emerging independent oil and gas company, has entered into an agreement with a wholly owned subsidiary of Anadarko Petroleum Corp., allowing Armada to broaden its flagship Niobrara project in Southern Wyoming.

Co-based Synergy Resources Corp., a US oil and gas exploration and production company focused on the Denver-Julesburg (D-J) Basin, has entered into a definitive agreement to purchase from Orr Energy 36 producing oil and gas wells in the Wattenberg Field of the Denver-Julesburg Basin. 

Carrizo Oil & Gas Inc. has entered into a Niobrara shale joint venture with two Delhi, India-based energy companies and has completed the sale of virtually all of its Gulf Coast assets.

Quicksilver Resources has signed a joint venture agreement with a unit of Shell in the Sandwash Basin of Northwest Colorado.

The most important Western US unconventional resource play not named Bakken is the Niobrara, which is found in various states, but most notably in the Denver-Julesburg basin in Colorado, Wyoming, and a small portion of western Nebraska.