EOR (Enhanced Oil Recovery)
EOR = Enhanced Oil Recovery
EOR is a technique for increasing oil recovery compared to oil extraction by natural pressure in a reservoir.
EOR refers to reservoir processes that recover oil not produced by secondary processes. Primary recovery uses the natural energy of the reservoir to produce oil or gas. Secondary recovery uses injectants to re-pressurize the reservoir and to displace oil to producers. The main realization of this concept is waterflooding, although gas reinjection for pressure maintenance is also included. Enhanced oil recovery processes target what is left. They
focus on the rock/oil/injectant system and on the interplay of capillary and viscous forces.
Enhanced oil recovery is also called tertiary recovery (as opposed to primary and secondary recovery)
EOR is achieved by gas injection, chemical injection, microbial injection, or thermal recovery (which includes cyclic or continuous steam, steam flooding, and fire flooding).
See also
Primary recovery
Secondary recovery
IOR (Improved Oil Recovery)
Links
IOR AND EOR: EFFECTIVE COMMUNICATION REQUIRES A DEFINITION OF TERMS. JPT, JUNE 2003