condensing gas driveCondensing gas drive is an enhanced oil-recovery method that uses miscible displacement and involves injection into an oil reservoir of natural gas that either a) naturally contains lighter hydrocarbons or b) has been enriched on the surface by addition of propane, butane, or pentane.
The transfer of the intermediate components from the displacing gas into the residual oil swells the residual oil and makes it less viscous.

Lean gas or lean gas and water is then injected to drive the oil toward a producing well. Noncritical condensing gas drive does not go to complete miscibility, whereas critical condensing gas drive goes
to miscibility.


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