دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a method of improved recovery in which alkaline chemicals such as sodium hydroxide are injected during a water flood or combined with polymer flooding. The chemicals react with the natural acid present in certain crude oils to form surfactants within the reservoir. The surfactants enable the water to move additional quantities of oil from the depleted reservoir. Compare chemical flooding, polymer flooding, water flooding.

abbr: combination of forward combustion and water flooding. Also called wet combustion.

a tertiary recovery mechanist consisting of combustion and water flooding.

v: 1. to drive oil from a reservoir into a well by injecting water under pressure into the reservoir formation. See water flooding. 2. to drown out a well with water.

injection of gas or water into a reservoir to drive oil towards a producing well or set of wells.

n: the tendency of reservoir fluids to separate into distinct layers according to their respective densities. For example. water is heavier than oil;therefore. water injected during water flooding will tend to move along the bottom portion of a reservoir.

n: a method of thermal recovery in which water at the boiling point is injected into a formation to lower the viscosity of the oil and allow it to flow more freely toward producing wells. Although generally less effective than steam injection because of lower heat, hot waterflooding may be preferable under certain conditions, such as formation sensitivity to fresh water or high pressures.

a series of injection and production wells in a regular arrangement.

n: 1. the use of waterflooding or gas injection to maintain formation pressure during primary production and to reduce the rate of decline of the original reservoir drive. 2. waterflooding of a depleted reservoir. 3. the first improved recovery method of any type applied to a reservoir to produce oil not recoverable by primary recovery methods. See pressure maintenance, primary recovery.

a recovery improvement process such as water flooding or gas flooding.

purposely injecting water below and/or into the reservoir to drive the oil towards the producing wellbore. This is a secondary recovery mechanism.

water flood.