Oil recovery method using dispersion of clays in aqueous polyacrylamide solutions
Partially hydrolyzed polyacrylamides have been used as thickening agents to increase the viscosity of liquids, primarily displacing liquids for use in secondary petroleum recovery. Such polyacrylamides decrease the moblity of the displacing liquids to improve their efficiency in displacing oil-in-place from formations and moving the oil toward production wells. Decreasing the mobility of the displacing fluids minimizes fingering or channeling of the displacement fluids through the body of oil-in-place in the formation. Improved viscosity and resistance factors of aqueous solutions containing partially hydrolyzed polyacrylamide are obtained by dispersing clay, e.g., sodium montmorillonite and phosphates in the solutions. The solutions are particularly useful as displacement fluids in the recovery of petroleum from earth formations. (10 claims)
- Assignee:
- Marathon Oil Co.
- Patent Number(s):
- US 3670820
- OSTI ID:
- 6024652
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ACRYLAMIDE
AMIDES
CLAYS
EFFICIENCY
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID FLOW
FLUID INJECTION
FOSSIL FUELS
FUELS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
MISCIBLE-PHASE DISPLACEMENT
MONTMORILLONITE
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROLEUM
PHOSPHATES
PHOSPHORUS COMPOUNDS
POLYACRYLATES
POLYAMIDES
POLYMERS
POLYVINYLS
RECOVERY
VISCOSITY
WELLS