EVALUATION OF KEY FACTORS AFFECTING SUCCESSFUL OIL PRODUCTION IN THE BAKKEN FORMATION, NORTH DAKOTA Technology Status Assessment Prepared by: James A. Sorensen Senior Research Manager Energy & Environmental Research Center Grand Forks, North Dakota Submitted to: John R. Terneus Project Manager Natural Gas and Oil Project Management Division Strategic Center for Natural Gas and Oil National Energy Technology Laboratory U.S. Department of Energy Morgantown, West Virginia December 16, 2008