Capstone Energy Services

Energy Basics

Terms A-Z

Natural Gas

A naturally occurring mixture of hydrocarbon and non-hydrocarbon gases found in porous geologic formations beneath the earth's surface, often in association with petroleum. The principal constituent is methane. 1) Dry Gas - Gas whose water content has been reduced by a dehydration process. Gas containing little or no hydrocarbons commercially recoverable as liquid product. Specified small quantities of liquids are permitted by varying statutory definitions in certain states. 2) Liquefied Natural Gas (LNG). Natural gas cooled to a point of liquefaction for transportation to a market. 3) Sour Gas - Gas found in its natural state, containing such amounts of compounds of sulfur as to make it impractical to use, without purifying, because of its corrosive effect on piping and equipment. 4) Sweet Gas - Gas found in its natural state, containing such small amounts of compounds of sulfur that it can be used without purifying, with no deleterious effect on piping and equipment. 5) Wet Gas - Wet natural gas is unprocessed natural gas or partially processed natural gas produced from strata containing condensable hydrocarbons. The term is subject to varying legal definitions as specified by certain state statutes. (The usual maximum allowable is 7lbs./MMcf water content and .02 gallons/Mcf of Natural Gasoline.)

No-Notice Delivery Service

Delivery of natural gas on as-needed basis, without the need to precisely specify the delivery quantity in advance. No-notice delivery is generally made at the city gate or burner tip.

Nominated Volume

The physical quantity of gas requested, typically in MMBtu/day, for a specific contract or for all contracts at a specific point.


A request for a physical quantity of gas under a specific purchase, sales or transportation agreement or for all contracts at a specific point. A nomination will continue for specified number of days or until superseded by another service request for the same contract.

Non-Firm Power

Power or power-producing capacity supplied or available subject to interruption.

Energy Facts

Energy Facts

Natural gas can be used as a raw material in a variety of products, including paint, fertilizer, plastics and medicines.

Natural gas produces fewer emissions than other fossil fuels, with less nitrogen, sulfur, carbon and fine particulates.

Texas produces the largest amount of natural gas in the USA.

The biggest consumer of coal in the US is the electric power sector.

There are 17,658 electric utility generators in the USA.

Energy Delivery Chains

Energy Delivery Chains

Find out more about how your energy is produced and delivered to your business.

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Energy & the Environment

Energy & the Environment

How we assist clients in responding to national environmental concerns.

  • Initiate and manage a "Green" energy procurement program
  • Evaluate national legislative and regulatory initiatives
  • Research state and local energy efficiency programs and incentives
  • Track energy use and related emissions estimate