Emulsion oil recovery process usable in high temperature, high salinity formations
Many petroleum formations contain water having high salinity and/or high concentrations of divalent ions such as calcium or magnesium dissolved therein, and are additionally at temperatures from about 70/sup 0/F. to about 300/sup 0/F. Most surfactants suitable for use in oil recovery operations are either ineffective in high salinity or high hardness waters, or cannot tolerate the higher temperatures encountered in many such formations. A waterexternal phase emulsion, microemulsion or micellar dispersion containing a water soluble alkylpolyalkoxyalkylene sulfonate or alkylarylpolyalkoxyalkylene sulfonate and a water-insoluble polyethoxylated aliphatic alcohol (Including alkanols) or polyethoxylated alkylphenol nonionic surfactant is an effective fluid for flooding in formations containing water whose salinity is from 70,000 to 220,000 parts per million total dissolved solids and also having temperatures as high as 300/sup 0/F. The fluid is phase stable over a wide range of formation temperatures and water salinities and hardness values.
- Assignee:
- Texaco Inc
- Patent Number(s):
- US 4269271
- OSTI ID:
- 6149779
- Resource Relation:
- Patent File Date: Filed date 1 May 1978
- Country of Publication:
- United States
- Language:
- English
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Emulsion oil recovery process usable in high temperature, high salinity formations
Surfactant oil recovery process usable in high temperature formations containing high salinity water
Related Subjects
OIL WELLS
MICROEMULSION FLOODING
CALCIUM IONS
ENHANCED RECOVERY
INJECTION WELLS
INTERSTITIAL WATER
MAGNESIUM IONS
MEDIUM TEMPERATURE
PETROLEUM
SALINITY
SULFONATES
SURFACTANTS
WELL STIMULATION
CHARGED PARTICLES
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
GROUND WATER
HYDROGEN COMPOUNDS
IONS
MISCIBLE-PHASE DISPLACEMENT
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
RECOVERY
STIMULATION
WATER
WELLS
020300* - Petroleum- Drilling & Production