Petroleum Development Corporation Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation
PDC Gas - Petroleum Development Corporation

Appalachian Basin
PDC Gas - Appalachian Basin
We have conducted operations in the Appalachian Basin since our inception in 1969. We own an interest in approximately 2,027 gross, 1,501.6 net, oil and natural gas wells in West Virginia, Pennsylvania and Tennessee. We drilled 8 gross/net wells in the area in 2007 and produced approximately 2.7 Bcfe net to our interests. The majority of the West Virginia leasehold is developed on approximately 40 acre spacing. We are currently evaluating the results of an infill drilling project on a limited portion of our developed leasehold. Wells located in this area are approximately 4,500 feet deep and target predominantly gas reserves in Devonian and Mississippian aged tight sandstone reservoirs. The majority of our 10,000 net undeveloped acres was acquired through our Castle acquisition in October 2007. Development wells in this area target similar Devonian aged sands as in West Virginia, at depths ranging from 3,000 to 4,500 feet.

Operations    
Rocky Mountains    
Appalachian Basin    
Michigan Basin    
Forth Worth Basin    



PDC Gas - Petroleum Development Corporation: Bridgeport, West Virginia PDC Gas - Petroleum Development Corporation: Bridgeport, West Virginia
Operations Operations Operations