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| Carbon Dioxide EOR. From Lawrence Livermore National Laboratory |
Primary Depletion – the reservoir produces under the original reservoir energy, by natural expansion.
Secondary Recovery – the reservoir is supported by injection of water or gas. The injected material does not only help by maintaining reservoir energy, but displaces oil directly.
Tertiary Recovery/Improved Oil Recovery (IOR)/Enhanced Oil Recovery (EOR) – Methods employed to scoop additional oil that wouldn’t be got from either primary or secondary. Examples are gas injection, thermal, chemical and microbial methods.
Sent in by Juliet Dagogo.
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