Process for secondary recovery
Hydrocarbons are recovered from a subterranean hydrocarbon-bearing formation penetrated by an injection well and a production well by displacing hydrocarbons toward the production well using a drive fluid such as water thickened with polyacrylamide or partially hydrolyzed polyacrylamide alkoxylated with an alkylene oxide and, if desired, a small amount of a sulfonated, alkoxylated polyacrylamide, i.e., an N-substituted polyacrylamide having N-substituents of the formula: (CH/sub 2/CH/sub 2/O) /SUB m/ /sub -//sub 1/CH/sub 2/CH/sub 2/SO/sub 3/M. where m is an integer of from 2 to 5 and M is selected from the group consisting of hydrogen, sodium, potassium or ammonium. Optionally, the drive fluid can be saturated with carbon dioxide, nitrogen and/or natural gas at the injection pressure.
- Assignee:
- Texaco Development Corp.
- Patent Number(s):
- US 4440652
- OSTI ID:
- 6606364
- Resource Relation:
- Patent File Date: Filed date 8 Feb 1982; Other Information: PAT-APPL-346982
- Country of Publication:
- United States
- Language:
- English
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Process for secondary recovery
Process for secondary recovery
Related Subjects
DISPLACEMENT FLUIDS
CHEMICAL COMPOSITION
OIL WELLS
MICROEMULSION FLOODING
WATERFLOODING
AMMONIA
AQUEOUS SOLUTIONS
CARBON DIOXIDE
ENHANCED RECOVERY
HYDROGEN
NATURAL GAS
NITROGEN
POLYACRYLATES
POLYAMIDES
POTASSIUM
SODIUM
WELL STIMULATION
ALKALI METALS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DISPERSIONS
ELEMENTS
ENERGY SOURCES
ESTERS
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDRIDES
HYDROGEN COMPOUNDS
METALS
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
POLYVINYLS
RECOVERY
SOLUTIONS
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production