دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a copolymer. Acrylamido-methyl-propane sulfonate polymer.

n: a liquefied hydrocarbon product consisting chiefly of pr0- pane and/or propylene and conforming to the GPA specification for commercial pro- pane as defined in GPA Publication 2140.

n: a type of testing used extensively on casing head gas that has a propane content of above 0.5 to ].0 gallon per thousand cubic feet to determine the liquid hydrocarbon content of the gas.

n: the refrigeration cycle in which refrigeration is supplied by the evaporation of a liquid refrigerant such as propane or ammonia. Compare absorption-refrigeration cycle.

n: a light hydrocarbon liquid obtained by condensation of hydrocarbon vapours. It consists of varying proportions of butane, propane, pentane, and heavier fractions, with little or no methane or ethane.

the part of the hydrocarbon stream that is a vapor in the formation and condenses to a liquid after being cooled. Normally the volatile condensate has a composition of C5 to C8 and an API gravity of >40.

n: a unit of equipment for separating propane, with or without lighter components. from a mixture of hydrocarbons and leaving a bottoms product that is essentially propane-free.

abbr: equivalents per million. EP mix abbr: ethane-propane mix.

equivalents per million. The epm is equal to the ppm divided by the equivalent weight.

the process of separating natural gas into component parts or fractions such as propane, butane, ethane, etc.

n: the injection of gas into a reservoir to maintain formation pressure by gas drive and to reduce the rate of decline of the original reservoir drive. One type of gas injection uses gas that does not mix (i.e., that is not miscible) with the oil. Examples of these gases include natural gas, nitrogen, and flue gas. Another type uses gas that does mix (i.e., that is miscible) with the oil. The gas may be naturally miscible or become miscible under high pressure. Examples of miscible gases include propane, methane enriched with other light hydrocarbons, methane under high pressure, and carbon dioxide under pressure. Frequently, water is also injected in alternating steps with the gas.

the technique of injecting gas into a reservoir. It may be done for pressure maintenance, oil viscosity reduction, light end stripping or storage.