Effect of wettability and spreading on recovery of waterflood residual oil by immiscible gasflooding
This paper investigates the mobilization and recovery of waterflood residual oil by immiscible gasflooding in 2D glass micromodels under strongly oil- and water-wet conditions. The oil/water/gas systems, one displaying a positive and the other a negative spreading coefficient (oil over water), were used. The results clearly show the importance of fluid/solid and fluid/fluid interactions on tertiary oil recovery. Oil recovery was highest for the oil-wet displacements where the oil formed thick wetting films. Recovery was considerably lower for the positive spreading system under strongly water-wet conditions where the oil was observed to from thin but continuous spreading films. Recovery was lowest for the negative spreading system under strongly water-wet conditions where no oil films were formed.
- OSTI ID:
- 6993862
- Journal Information:
- SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 9:2; ISSN 0885-923X; ISSN SFEVEG
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200 -- Petroleum-- Reserves
Geology
& Exploration
020300* -- Petroleum-- Drilling & Production
DISPLACEMENT FLUIDS
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
OIL WELLS
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
STIMULATION
SWEEP EFFICIENCY
WATERFLOODING
WELL STIMULATION
WELLS
WETTABILITY