Except as noted, U.S. Energy Information Administration, Annual Energy Review;

Except as noted, U.S. Energy Information Administration, Annual Energy Review;

International Energy Annual; U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves; and

Natural Gas Annual.

For more information:

http://www.eia.doe.gov/oil_gas/natural_gas/info_glance/natural_gas.html

Definitions

Natural Gas: A mixture of hydrocarbons (principally methane) and

small quantities of various nonhydrocarbons existing in the gaseous

phase or in solution with crude oil in underground reservoirs.

Natural Gas, Dry: The marketable portion of natural gas production,

which is obtained by subtracting extraction losses, including natural gas

liquids removed at natural gas processing plants, from total production.

Natural Gas Gross Withdrawals: Full well stream volume of pro-

duced natural gas, excluding condensate separated at the lease.

Natural Gas Marketed Production: Gross withdrawals of natural

gas from production reservoirs, less gas used for reservoir repressur-

ing; nonhydrocarbon gases removed in treating and processing

operations; and quantities vented and flared.

Proved Reserves, Crude Oil: The estimated quantities of all liquids

defined as crude oil that geological and engineering data demonstrate

with reasonable certainty to be recoverable in future years from

known reservoirs under existing economic and operating conditions.

Extraction Loss: The reduction in volume of natural gas due to the

removal of natural gas constituents, such as ethane, propane, and bu-

tane, at natural gas processing plants.

*

referenced on dataset section Notes (#2)