دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: termination of a jurisdictional sale or service. Under Section 7(b) of the Natural Gas Act, the Federal Energy Regulatory Commission must determine in advance that the present or future public convenience and necessity" or depletion of gas supplies requires termination.

n: the amount of oil or gas that can be produced legally from a well. In a state using proration, this figure is established monthly by its conservation agency. See proration.

the production limit set on a specific well by a government regulatory body. Rarely seen.

n: natural gas that overlies and contacts crude oil in a reservoir. Where reservoir conditions are such that the production of associated gas does not substantially affect the recovery of crude oil in the reservoir, such gas may also be reclassified as non-associated gas by a regulatory agency. Also called associated free gas. See gas cap.

the natural gas which occurs with crude oil. It may be free or dissolved. When it occurs as free gas, it may be called unassociated gas.

n: see bottomhole choke.

n pi: requirements, usually set by a regulatory agency, concerning the characteristics and manner of covering a pipeline.

n: reduction in service or purchases below contracted-for levels. Curtailment of gas sales service is a method of balancing a utilitys natural gas requirements with its natural gas supply. There is usually a hierarchy of customers for the curtailment plan based on priority of usage according to established regulatory standards of priority. A customer may be required to cut back partially or totally to eliminate this take of gas, depending on the severity of the shortfall between gas sup- ply and demand and the customers position in the hierarchy. From the customers standpoint. curtailment may also mean a reduction by the customer of its takes of gas from its supplier. Curtailment of a transportation service occurs when demands for service exceed the capacity of the pipeline. Capacity curtailment is based on contract rather than end-use priority. All interruptible service must be entirely curtailed before any firm service is curtailed. Currently, interruptible transportation service is curtailed based on position in the firstcome, first-served queue. Firm transportation service is usually curtailed on a pro rata basis.

n: the part of the opencircuit diving system that allows a diver to expel all used air directly into the water and avoid rebreathing exhaled carbon dioxide. The regulator reduces the air pressure in the tanks to a divers ambient pressure so that he or she can breathe the air with no resistance. Also called open-circuit regulator.

n: (DOE) a federal department set up to provide a frame- work for a complete and balanced national energy plan through coordination and administration of the energy functions of the federal government. It is responsible for longterm, high-risk research and development of energy technology, the marketing of federal power, energy conservation, the nuclear weapons program, energy regulatory programs, and a central energy data collection and analysis program. Address: 1000 Independence Ave. SW;Washington, DC 20585;(202) 586-5000.

n: a clause in a contract currently governed by regulatory price ceilings to provide a process to reset the price of gas should price controls and regulatory authority cease.

n: station to which odorized gas is piped from the city gate station. This station uses regulators and controllers to maintain consistent pressure and to ensure a constant supply of natural gas to consumers. See also city gale station.