Tertiary Recovery

The third major phase of crude oil recovery. The primary phase is flowing and finally pumping down the reservoir until it is "depleted" or no longer economical to operate. Secondary recovery usually involves re-pressuring or simple water-flooding. The third or tertiary phase employs more sophisticated techniques of altering one or more of the properties of crude oil, e.g., reducing surface tension. This is accomplished by flooding the formation with water mixed with certain chemicals that "free" the oil adhering to the porous rock so it may be taken into solution and pumped to the surface. See Micellar-surfactant Flooding.

RECUPERAÇÃO TERCIÁRIA - Processo de recuperação do petróleo após a secundária, isto é, o aumento na produção de petróleo e gás através de métodos de recuperação, que consistem em injeção de fluido mais barato que o óleo cru em uma reserva ou poço, dirigindo o óleo em direção aos poços de produção.

بازيابي ثالث

Recovery of hydrocarbons from a reservoir over and above what can be recovered using primary and secondary recovery. It usually means employing a sophisticated method such as heating the reservoir or enlarging the pore spaces using chemicals. See also: acidizing.