EIA - Federal Financial Interventions & Subsidies in Energy Markets 2007From the EIA website,

This report responds to a request from Senator Lamar Alexander of Tennessee that the EIA update its 1999 to 2000 work on Federal energy subsidies, including any additions or deletions of Federal subsidies based on Administration or Congressional action since 2000, and providing an estimate of the size of each current subsidy. Subsidies directed to electricity production are estimated on the basis of generation by fuel.

From the report Executive Summary,

Notwithstanding the doubling of Federal energy-related subsidies and support between 1999 and 2007, and a significant increase in most energy prices over that period, U.S. energy production is virtually unchanged since 1999 ... Basic economic principles suggest that higher real energy prices together with the significant incentives provided to various production segments of the energy sector would tend to raise domestic energy production. A variety of factors unrelated to prices or subsidy programs such as State and Federal statutory limitations imposed on onshore and offshore oil and natural gas exploration in environmentally sensitive areas, uncertainty regarding future environmental policies possibly restricting future emissions of greenhouse gases, and declines in future production from previously developed domestic oil and natural gas resources may have impeded growth in energy production despite modest growth in consumption.