1.
n. [Enhanced Oil Recovery]
A chemical enhanced oil
recovery flood that uses two sources of surfactant and a
polymer.
Alkaline chemicals such as
sodium carbonate react with acidic oil components
in situ to create
petroleum soap, which is one of the surfactants. A synthetic surfactant is injected simultaneously with the alkali. A water-soluble polymer is also injected, both in mixture with the alkali and surfactant and as a
slug following the mixture, to increase the
viscosity of the injectant, thereby improving
mobility control of the flood fronts.