Oil recovery process using a treated polymer solution

Patent · Tue Sep 19 04:00:00 EDT 1989

OSTI ID:5405405

Luetzelschwab, W E

This patent describes a process for recovering oil from a subterranean oil-bearing formation. It comprises the sequential steps of: contacting an aqueous acrylamide polymer-free liquid with an oxygenating agent, wherein the aqueous acrylamide polymer-free liquid initially contains hydrogen sulfide in a sufficient concentration to substantially degrade an acrylamide polymer; reducing the initial hydrogen sulfide concentration of the aqueous acrylamide polymer-free liquid; mixing the aqueous liquid with the acrylamide polymer to form an aqueous acrylamide polymer solution; injecting the aqueous acrylamide polymer solution into the subterranean oil-bearing formation; and recovering oil from the formation.

• Assignee: Marathon Oil Co., Findlay, OH
• Patent Number(s): US 4867239
• Application Number: PPN: US 7238706A
• OSTI ID: 5405405
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AMIDES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL COMPOSITION
DISPERSIONS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PETROLEUM
RECOVERY
SOLUTIONS
STIMULATION
SULFIDES
SULFUR COMPOUNDS
WATERFLOODING
WELL STIMULATION
WELLS