Surfactant oil recovery process usable in formations containing water having high concentrations of polyvalent ions such as calcium and magnesium
This process uses a three-component system of surfactants which is usable in the presence of from about 1,500 to 12,000 ppm polyvalent ions, such as calcium and magnesium. The surfactant system consists of (1) a water souble salt of an alkyl or alkyl aryl sulsonate anionic surfactant, (2) a water soluble salt of an alkyl polyethoxy sulfate anionic surfactant, and (3) a nonionic surfactant such as a polyethoxylated alkyl phenol, a polyethoxylated aliphatic alcohol, or a fatty acid mono- or dialkanolamide. The process consists of injecting into a carbonate reservoir the surfactant solution, followed by an aqueous solution of polyacrylamide, and finally injecting water to displace the two previous substances plus oil. Recoveries are anticipated to be approximately 90 percent of the original oil in place.
- Assignee:
- Texaco Inc.
- Patent Number(s):
- US 3811504
- OSTI ID:
- 7093263
- Country of Publication:
- United States
- Language:
- English
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Surfactant oil recovery process usable in formations containing water having high concentrations of polyvalent ions such as calcium and magnesium
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METALS
CALCIUM
ELEMENTS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
MAGNESIUM
METALS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
POLYAMIDES
POLYMERS
SURFACTANTS
WATERFLOODING
WELL STIMULATION
WELLS