1To the extent that lease condensate is measured or estimated it is included in "Natural Gas Liquids";
otherwise, lease condensate is included in "Crude Oil." |
5Proved reserves (see Table 4.2) are not included in these estimates. Ultimate recovery appreciation
(reserve growth) is the volume by which the estimate of total recovery from a known crude oil or natural gas
reservoir or aggregation of such reservoirs is expected to increase during the time between discovery and
permanent abandonment. |
2Conventionally reservoired deposits are discrete subsurface accumulations of crude oil or natural gas
usually defined, controlled, or limited by hydrocarbon/water contacts. |
6Unconventionally reservoired deposits (continuous-type accumulations) are geographically extensive
subsurface accumulations of crude oil or natural gas that generally lack well-defined hydrocarbon/water
contacts. Examples include coalbed methane, "tight gas," and self-sourced oil- and gas-shale reservoirs. |
| 3Onshore plus State offshore waters (near-shore, shallow-water areas under State jurisdiction). |
Notes: · "Technically recoverable" resources are those that are producible using current technology
without reference to the economic viability thereof. · For purposes of comparison, the Potential Gas
Committee, an industry-sponsored group of experts, biennially provides another geologically-based
estimate of the Nation's natural gas resources. The latest mean estimate, published in "Potential Supply of
Natural Gas in the United States," December 31, 2006, is 1,321 trillion cubic feet. This volume includes
undiscovered conventionally reservoired deposits, expected ultimate recovery appreciation, coalbed
methane, and tight gas where it is believed to be technically recoverable and marketable at reasonable
costs. · A value of zero indicates either that none exists in this area or that no estimate of this resource
has been made for this area. · "48 States" is the United States excluding Alaska and Hawaii. |
4Federal offshore jurisdictions (Outer Continental Shelf and deeper water areas seaward of State
offshore). |
Sources: · National Oil and Gas Resource Assessment Team, 2007 Assessment Updates United
States Geological Survey, Washington, D.C., December 2007 at http://energy.cr.usgs.gov/oilgas/noga/
ass_updates.html. · Resource Evaluation Division, Assessment of Undiscovered Technically Recoverable
Oil and Gas Resources of the Nation's Outer Continental Shelf, 2006 MMS Fact Sheet RED-2006-01b,
Minerals Management Service, Washington, D.C., February 2006, at http://www.mms.gov/revaldiv/PDFs/
2006NationalAssessmentBrochure.pdf. · The ultimate recovery appreciation estimates for Alaska and the
Lower 48 States Onshore Plus State Waters were developed by the Energy Information Administration,
Reserves and Production Division, Office of Oil and Gas, based on data available as of year-end 2006. |
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