Comparative evaluation of microemulsions and aqueous surfactant systems. [Of oil-water interfacial tension, adsorption on reservoir rock, and stability with divalent ions and high salinity brines]
Comparisons of identical concentrations of petroleum sulfonates and cosurfactants were made using oil-external microemulsion, a water-external microemulsion, and an aqueous surfactant solution. Criteria used were oil-water interfacial tension, adsorption on reservoir rock, and stability with divalent ions and high salinity brines. The water-external microemulsions produced lower interfacial tensions and were less affected by adsorption, while the oil-external microemulsions showed a better tolerance for brine and divalent ions. Tests were made on sandstone cores and artificial preparations such as silica gel, using a low equivalent weight sulfonate of 340 and a high equivalent weight sulfonate of 495. Although no system has superiority in all categories of comparison, it appears that the aqueous system would give better overall performance.
- OSTI ID:
- 7299630
- Resource Relation:
- Conference: Improved oil recovery symposium of the Society of Petroleum Engineers, Tulsa, OK, USA, 22 Apr 1974; Related Information: Preprint No. 4749
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MICROEMULSIONS
COMPARATIVE EVALUATIONS
SURFACTANTS
ADSORPTION
ENHANCED RECOVERY
MICROEMULSION FLOODING
OIL WELLS
PETROLEUM
RESERVOIR ROCK
SANDSTONES
STABILITY
SURFACE TENSION
WATERFLOODING
WELL STIMULATION
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
MISCIBLE-PHASE DISPLACEMENT
ROCKS
SEDIMENTARY ROCKS
SORPTION
SURFACE PROPERTIES
WELLS
020300* - Petroleum- Drilling & Production