Record Increases in U.S. Crude Oil and Natural Gas Reserves in 2010
Crude Oil Reserves Up 13 Percent to Highest Level Since 1991
Natural Gas Reserves Up 12 Percent, Top 300 Trillion Cubic Feet for First Time
U.S. proved crude oil and natural gas reserves achieved record annual volumetric increases in 2010 according to U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, 2010, released today by the U.S. Energy Information Administration (EIA).
“The use of horizontal drilling and hydraulic fracturing in shale and other tight rock formations played an important role in the increase of oil and natural gas reserves,” said EIA Administrator Adam Sieminski. “For both oil and natural gas, these reserves increases underscore the potential of a growing role for domestically-produced hydrocarbons in meeting current and projected U.S. energy demand.”
Proved oil reserves, which include crude oil and lease condensate, increased by 13 percent in 2010 to 25.2 billion barrels, marking the second consecutive annual increase and the highest volume of proved reserves since 1991.
Texas recorded the largest volumetric increase in proved oil reserves among individual states, largely because of ongoing development in the Permian and Western Gulf Basins, while North Dakota had the second largest increase, driven by development activity in the Bakken formation in the Williston Basin.
Natural gas proved reserves, estimated as “wet” gas that includes natural gas plant liquids, increased by 12 percent in 2010 to 317.6 trillion cubic feet (Tcf), the twelfth consecutive annual increase and the first year U.S. reserves surpassed 300 Tcf.
Texas also led the nation in additions of natural gas proved reserves, primarily because of continued development of the Barnett and Haynesville/Bossier shale formations. Louisiana had the second largest volumetric increase, largely the result of ongoing development activity in the Haynesville shale formation. In Pennsylvania, accelerated drilling programs in the Marcellus shale formation more than doubled the state’s year-end 2009 volumes.
Contributing to the increases for both oil and natural gas proved reserves was the expanding application of horizontal drilling and hydraulic fracturing in shale and other “tight” (very low permeability) formations. Another important factor for each fuel – particularly oil – was a higher price used to assess economic viability relative to the prices used for the 2009 reporting year.
Proved reserves are those volumes of oil and natural gas that geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions. EIA’s estimates of proved reserves are based on an annual survey of about 1,200 domestic oil and gas well operators.
Publication of 2010 reserves data was delayed because of budgetary restrictions that limited EIA’s survey data collection efforts. U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, 2010 is available on the EIA Internet site at: http://www.eia.gov/naturalgas/crudeoilreserves.
The product described in this press release was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA’s data, analysis, and forecasts are independent of approval by any other officer or employee of the United States Government. The views in the product and press release therefore should not be construed as representing those of the Department of Energy or other Federal agencies.
EIA Program Contact: Steven G. Grape, 202-586-1868, Steven.Grape@eia.gov
EIA Press Contact: Jonathan Cogan, 202-586-8719, Jonathan.firstname.lastname@example.org
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