Chief Oil & Gas Drills 100th Well in the Marcellus Shale

Natural gas well in Blair County is milestone for Chief

Wexford, Pennsylvania (January 24, 2011) – Chief Oil & Gas has drilled its 100th natural gas well in the Marcellus Shale, the Lightner East Unit #1H in Blair County, Pennsylvania. The Lightner East #1H is one of five wells that Chief has drilled in Blair County.

"We are very pleased with production in the Marcellus Shale and are proud of our role in producing clean natural gas for the nation and contributing to the growth of Pennsylvania's economy," stated Kristi Gittins, Vice President of Public Affairs for Chief Oil & Gas.

Chief has operations in 11 counties in Pennsylvania, including Bedford, Blair, Bradford, Clearfield, Fayette, Greene, Lycoming, Somerset, Sullivan, Susquehanna and Wyoming. It also operates in Preston and Marshall Counties in West Virginia. In November, Chief announced that it had reached a daily production milestone of 100 MMcf per day.

Chief Oil & Gas owns more than 487,000 net acres of leasehold for natural gas drilling in the Marcellus Shale, a formation that runs from the southern tier of New York, through the western portion of Pennsylvania into the eastern half of Ohio and through West Virginia. In Pennsylvania, the formation extends from the Appalachian plateau into the western valley and ridge.

About Chief Oil & Gas LLC

Based in Dallas, Texas, Chief Oil & Gas is privately held, independent oil & gas company engaged in the exploration, development and production of oil and natural gas reserves from fields throughout the continental United States.