About Warren Resources

We are a growing independent energy company engaged in the exploration and development of domestic onshore natural gas and oil reserves. We are one of the leading developers of coalbed methane natural gas, or CBM, in the Rocky Mountain region. As of December 31, 2009 we owned natural gas and oil interests in approximately 160,053 gross (85,534 net) acres. Currently approximately 20% of our net acreage has been developed. Our CBM operations are focused in the Washakie Basin, which comprises approximately the southeast one-third of the Greater Green River Basin in southwestern Wyoming. Additionally, we own natural gas and oil interests in the Wilmington field, located in the Los Angeles Basin of California. We intend to develop our California properties through directional and horizontal drilling. Also, we own natural gas and oil interests in non-strategic properties in Texas, New Mexico and North Dakota.

We seek to generate growth in oil and gas reserves, production volumes and cash flow by exploiting our existing properties through the drillbit by drilling numerous locations identified on our Rocky Mountain CBM properties and on our Wilmington unit. As of December 31, 2009 we have identified a total of 530 drilling locations in our Rocky Mountain CBM properties. In addition, we also have drilling locations in our Wilmington field units. The following map illustrates the location of our substantial reserves and acreage. All of our natural gas and oil drilling, completion, production and land operations are conducted through our wholly owned subsidiary, Warren E&P, Inc.. Warren E&P was formed in 1973, and has offices in Casper, Wyoming and Long Beach, California.

©2002-2010 Warren Resources, Inc.