1See "Proved Reserves, Crude Oil," "Proved Reserves, Lease Condensate," and "Proved Reserves, Natural Gas" in Glossary. |
7Includes Federal offshore and State offshore waters (near-shore, shallow-water areas under State jurisdiction). |
2"Technically recoverable" resources are those that are producible using current technology without reference to the economic viability thereof. |
8Natural gas produced from a non-shale formation with extremely low permeability. |
3"48 States" is the United States excluding Alaska and Hawaii. |
9See "Shale Gas" in Glossary. |
4Excludes natural gas plant liquids. See "Natural Gas, Dry" in Glossary. |
10See "Coalbed Methane" in Glossary. |
5Conventionally reservoired deposits are discrete subsurface accumulations of crude oil or natural gas usually defined, controlled, or limited by hydrocarbon/water contacts. |
Notes: · See Tables 4.2 and 4.3 for more recent proved reserves data. · Data are at end of year. · Resources in areas where drilling is officially prohibited are not included. Estimates of the resources in the Northern Atlantic, Northern and Central Pacific, and within a 50-mile buffer off the Mid and Southern Atlantic Outer Continental Shelf (OCS) are also excluded from the technically recoverable volumes. · Totals may not equal sum of components due to independent rounding. |
6Includes associated-dissolved (AD) natural gas that occurs in crude oil reservoirs either as free gas (associated) or as gas in solution with crude oil (dissolved gas). |
Sources: Proved Reserves: U.S. Energy Information Administration (EIA), U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves, 2010 (August 2012). Unproved Resources: U.S. Geological Survey National Oil and Gas Resource Assessment Team, with adjustments made to the shale gas data by EIA, Office of Energy Analysis. Total Technically Recoverable Resources: Calculated as the sum of proved reserves and unproved resources. |