دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a method of equating the energy produced by a hydrocarbon gas to a standard oil measurement. One barrel of oil has about the same heat producing capacity as 6,000 ft3 of gas at standard conditions.

barrels of oil equivalent. A method of equating the energy produced by a hydrocarbon gas to a standard oil measurement. One barrel of oil has about the same heat producing capacity as 6,000 ft3 of gas at standard conditions.

n: a paraffin hydrocarbon, C2H6;under atmospheric conditions, a gas. One of the components of natural gas.

a two carbon chain alkane, C2H6. A gas under standard conditions of temperature and pressure.

the process of cooling gas to -162oC, reducing its volume by 600 fold over the gas volume at standard conditions.

n: a highly compressible. highly expansible mixture of hydrocarbons with a low specific gravity and occurring naturally in a gaseous form. Besides hydrocarbon gases, natural gas may contain appreciable quantities of nitrogen. helium. carbon dioxide. hydrogen sulphide. and water vapour. Although gaseous at normal temperatures and pressures, the gases making up the mixture that is natural gas are variable in form and may be found either as gases or as liquids under suitable conditions of temperature and pressure.

n: A naturally occurring mixture of hydrocarbon gases that is highly compressible and expansible. Methane [CH4] is the chief constituent of most natural gas (constituting as much as 85% of some natural gases),with lesser amounts of ethane [C2H6], propane [C

methane, CH4;plus some short chain hydrocarbons (ethane, propane, butane) that may be in gasseous state at standard conditions.

n: the portion of hydrocarbons that cannot be removed by ordinary producing mechanisms when a porous reservoir has been saturated with hydrocarbons. This value is usually a specific percentage of the pore volume. In the case of gas, the volume, measured at standard conditions, that is retained in a reservoir as residual gas saturation is an inverse function of the pressure, due to the effect of the gas laws.

abbr: standard cubic feet.

standard cubic foot, a measurement at standard conditions of gas volume.

n pi: the standard pressure and temperature to which measurements should be referred. These are (I bar [IOI.325kPa]/cm2),15�C for the SI metric system, and 14.73 Ibfm.2, 6()�F for the US and British systems.