دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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.

n pi: the low molecular weight hydrocarbons such as methane, ethane, propane, and butanes.

n pi: light hydrocarbons lost to the atmosphere in a gas plant.

n: a substance that consists of large rnolecules formed frorn srnaller rnolecules in repeating structural units (rnonomers). In oilfield operations, various types of polymers are used to thicken drilling rnud, frac- turing fluid, acid, water, and other liquids. See micellar-polymer flooding, polymer mud. In petroleum refining, heat and pressure are used to polyrnerize light hydrocarbons into larger rnolecules, such as those that rnake up high-octane gasoline. In petrochernical production, polymer hydrocarbons are used as a feedstock for plastics.

a synthetic or man made gelling agent that increases viscosity and helps control leakoff.

removing light hydrocarbons (C2+) from the gas before sale.