Effect of clays, limestone, and gypsum on soluble oil flooding. [Flooding solutions are sensitive to divalent cations in interstitial water]
Conference
·
OSTI ID:7215983
Laboratory studies performed on unconsolidated sandpacks showed that soluble oil flooding solutions are sensitive to divalent cations in interstitial water. Small amounts (1 to 2 percent) of clay, gypsum, or limestone were added to a sandpack and the packs were waterflooded to residual oil saturation, soluble-oil flooded, and waterflooded with one PV of Dow Pusher 700 solution. Gypsum had the largest effect in reducing recoverability because of its high water solubility. Although limestone also contains calcium ions, its effect on recoveries is much less because of its relative insolubility. Clays decrease recoverability greatly when interstitial water is fresh or when the exchangeable cation is calcium. By increasing the sodium concentration in the interstitial water, the negative effect of dissolved calcium can be minimized.
- OSTI ID:
- 7215983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBONATE ROCKS
CATIONS
CHARGED PARTICLES
CLAYS
FLUID INJECTION
GROUND WATER
GYPSUM
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
IONS
LIMESTONE
MINERALS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYAMIDES
POLYMERS
RESERVOIR ROCK
ROCKS
SAND
SEDIMENTARY ROCKS
SULFATES
SULFUR COMPOUNDS
WATER
WATERFLOODING
WELLS
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBONATE ROCKS
CATIONS
CHARGED PARTICLES
CLAYS
FLUID INJECTION
GROUND WATER
GYPSUM
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
IONS
LIMESTONE
MINERALS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYAMIDES
POLYMERS
RESERVOIR ROCK
ROCKS
SAND
SEDIMENTARY ROCKS
SULFATES
SULFUR COMPOUNDS
WATER
WATERFLOODING
WELLS