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Oilfield Glossary

water alternating gas
1.  n.  [Heavy Oil] ID: 11515

An enhanced oil recovery process whereby water injection and gas injection are alternately injected for periods of time to provide better sweep efficiency and reduce gas channeling from injector to producer. This process is used mostly in CO2 floods to improve hydrocarbon contact time and sweep efficiency of the CO2.

Alternate Form: WAG

See: contact time