دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see gas drive.

a reservoir drive mechanism in which dissolved gas from the crude oil breaks out of solution and provides energy to push the hydrocarbons toward the wellbore.

n: a source of natural reservoir energy in which the dissolved gas coming out of the oil expands to force the oil into the well bore. Also called solution-gas drive. See reservoir drive mechanism.

n: the use of the energy that arises from the expansion of compressed gas in a reservoir to move crude oil to a wellbore. Also called depletion drive. See dissolved- gas drive. gas-cap drive. reservoir drive mechanism.

flooding a oil reservoir from the top of the reservoir or an updip location, to push the oil towards a producing well.

n: when oil and gas are found in the same reservoir under pressure, the drilling of a well into the reservoir releases the pressure, causing the gas to expand. The expanding gas drives the oil toward and up the well bore. The expansive energy of the gas can be harnessed whether the gas is in solution or forming a cap above the oil.

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: the movement of fluids in a reservoir resulting from the force of gravity. In the absence of an effective water or gas drive. gravity drainage is an important source of energy to produce oil. and it may also supplement other types of natural drive. Also called segregation drive.

the movements in a reservoir driven by gravity.