Waterflood process employing thickened water

Patent · Mon Mar 18 23:00:00 EST 1968

OSTI ID:6177771

Williams, S A

This is a method of waterflooding by injecting thickened water into the formation. The flood water contains, as a thickening agent, a sulfoaklylated poly(glucosylglucan), a sulfoalkylated polysaccharide B-1459, or a mixture. The thickened flood water retains its high viscosity in the presence of a fairly wide range of temperatures and pH values and does not form objectionable precipitates with the divalent ions in the flood water or in the in-situ fluids. Formaldehyde or alkali metal chlorinated phenols are added to the thickened water to prevent bacterial decomposition. The pH value of the thickened water is buffered by adding an alkali metal carbonate. A surfactant is employed to effect lowered interfacial tension between the thickened flood water and the oil it displaces within the formation. (19 claims)

• Assignee: Mobil Oil Corp.
• Patent Number(s): US 3373810
• OSTI ID: 6177771
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
ALDEHYDES
ALKALI METAL COMPOUNDS
AROMATICS
CARBOHYDRATES
CARBON COMPOUNDS
CARBONATES
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FORMALDEHYDE
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
INTERFACES
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PH VALUE
PHENOLS
POLYSACCHARIDES
RECOVERY
SACCHARIDES
STIMULATION
SURFACE PROPERTIES
SURFACE TENSION
SURFACTANTS
VISCOSITY
WATERFLOODING
WELL STIMULATION
WELLS