DENVER, April 9, 2012 /PRNewswire/ -- Double Eagle Petroleum Co.

DENVER, Jan. 3, 2012 /PRNewswire/ -- Double Eagle Petroleum Co.

- 2010 proved reserves increase to 4.4 Tcfe from 3.9 Tcfe in 2009 - 2010 total 3P reserves increase to 15.9 Tcfe from 14.6 Tcfe in 2009 - 2010 drill-bit F&D costs of $1.48 per Mcfe - 2010 organic reserve replacement ratio of 324% - Undrilled inventory grows to 8,145 locations HOUSTON, Feb.

HOUSTON, May 5 /PRNewswire-FirstCall/ -- Ultra Petroleum Corp. (NYSE: UPL) continued to deliver strong financial and operating performance for the first quarter of 2010.

PINEDALE, Wyo., April 5 /PRNewswire/ -- Wyoming Wildlife Consultants, LLC (WWC), Ultra Resources Inc., Shell, and Questar Market Resources have released the annual report for a $1.4 million, five-year sage-grouse study designed to determine if natural gas development on the Pinedale Anticline in Wyoming influences the habitat selection of wintering greater sage-grouse. The report "Greater Sage-grouse Winter Habitat Selection Relative to Natural Gas Field Infrastructure in Northern Portions of the Pinedale Anticline Project Area Sublette County, Wyoming" presents the first four years of data from the study.