||A mixture of hydrocarbons that exists in liquid phase in natural underground reservoirs and remains
liquid at atmospheric pressure after passing through surface separating facilities. Depending upon
the characteristics of the crude stream, it may also include:
Small amounts of hydrocarbons that exist in gaseous phase in natural underground reservoirs but are
liquid at atmospheric pressure after being recovered from oil well (casinghead) gas in lease
separators and are subsequently commingled with the crude stream without being separately measured.
Lease condensate recovered as a liquid from natural gas wells in lease or field separation facilities
and later mixed into the crude stream is also included;
Small amounts of nonhydrocarbons produced with the oil, such as sulfur and various metals;
Drip gases, and liquid hydrocarbons produced from tar sands, gilsonite, and oil shale.
Liquids produced at natural gas processing plants are excluded. Crude oil is refined to produce a
wide array of petroleum products, including heating oils; gasoline, diesel and jet fuels; lubricants;
asphalt; ethane, propane, and butane; and many other products used for their energy or chemical content.
|Dry Natural Gas
||Natural gas which remains after: 1) the
liquefiable hydrocarbon portion has been removed from the
gas stream (i.e., gas after lease, field, and/or plant separation);
and 2) any volumes of nonhydrocarbon gases have been
removed where they occur in sufficient quantity to render the
gas unmarketable. (Note: Dry natural gas is also known as
consumer-grade natural gas. The parameters for measurement
are cubic feet at 60 degrees Fahrenheit and 14.73 pounds
per square inch absolute.)
|Dry Natural Gas Production
||The process of producing consumer-grade natural gas. Natural gas withdrawn from reservoirs is reduced by volumes used at the production (lease) site and by processing losses. Volumes used at the production site include (1) the volume returned to reservoirs in cycling, repressuring of oil reservoirs, and conservation operations; and (2) gas vented and flared. Processing losses include (1) nonhydrocarbon gases (e.g., water vapor, carbon dioxide, helium, hydrogen sulfide, and nitrogen) removed from the gas stream; and (2) gas converted to liquid form, such as lease condensate and plant liquids. Volumes of dry gas withdrawn from gas storage reservoirs are not considered part of production. Dry natural gas production equals marketed production less extraction loss.
||Located in Federal
domain, seaward of the coastline.
||A mixture consisting primarily of pentanes and heavier hydrocarbons which is recovered as a
liquid from natural gas in lease separation facilities. This category excludes natural gas plant
liquids, such as butane and propane, which are recovered at downstream natural gas processing
plants or facilities.
|Natural Gas Liquids
||Those hydrocarbons in natural gas which are separated from the gas through the processes
of absorption, condensation, adsorption, or other methods in gas processing or cycling
plants. Generally such liquids consist of propane and heavier hydrocarbons and are
commonly referred to as condensate, natural gasoline, or liquefied petroleum gases.
Where hydrocarbon components lighter than propane are recovered as liquids, these
components are included with natural gas liquids.
| Natural Gas, Wet After Lease Separation
||The volume of natural gas remaining after removal of lease condensate in lease and/or
field separation facilities, if any, and after exclusion of nonhydrocarbon gases where
they occur in sufficient quantity to render the gas unmarketable. Natural gas liquids
may be recovered from volume of natural gas, wet after lease separation, at natural gas
||The volume of natural gas withdrawn from reservoirs less (1) the volume returned to such
reservoirs in cycling, repressuring of oil reservoirs, and conservation operations;
less (2) shrinkage resulting from the removal of lease condensate; and less (3) nonhydrocarbon
gases where they occur in sufficient quantity to render the gas unmarketable. Volumes of gas
withdrawn from gas storage reservoirs and native gas, which has been transferred to the storage
category, are not considered production. Flared and vented gas is also considered production.
(This differs from "Marketed Production" which excludes flared and vented gas.)
| Production, Wet After Lease Separation
||The volume of natural gas withdrawn from reservoirs less (1) the volume returned
to such reservoirs in cycling, repressuring of oil reservoirs,
and conservation operations; less (2) shrinkage resulting
from the removal of lease condensate; and less (3)
nonhydrocarbon gases where they occur in sufficient quantity
to render the gas unmarketable. Note: Volumes of gas withdrawn
from gas storage reservoirs and native gas that has been
transferred to the storage category are not considered part of
production. This production concept is not the same as marketed
production, which excludes vented and flared gas.