Warren Resources, Inc. operates in the Crude petroleum and natural gas sector. Warren Resources, Inc. (Warren) is an independent energy company engaged in the exploration and development of domestic onshore oil and gas reserves. The focuses on the exploration and development of waterflood oil recovery properties in the Wilmington field within the Los Angeles Basin of California, and coalbed methane (CBM), natural gas properties located in the Rocky Mountain region. As of December 31, 2010, it owned natural gas and oil leasehold interests in approximately 135,904 gross (72,996 net) acres, approximately 80% of which are undeveloped. As of December 31, 2010, it had estimated net proved reserves of 21.6 million barrels of oil equivalent (MMBoe). These estimated net proved reserves include 10.2 million barrels (MMBbls) in Wilmington units (47%) and 68.2 billion cubic feet equivalent (Bcfe) primarily in CBM program in the Washakie Basin (53%). These net proved reserves are located on approximately 20% of its total net acreage. In our complete report available for purchase the company is compared to: GMX Resources Inc., Vanguard Natural Resources, LLC and China North East Petroleum Holdings Limited.