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Tertiary recovery process. [conditioning the research with a solution of a vinylpyrrolidone polymer, then an aqueous surfactant is injected and then waterflooding]

Patent ·
OSTI ID:5771404
;
A process for recovering hydrocarbons from a hydrocarbon-bearing formation penetrated by an injection well and a production well which comprises injecting an aqueous solution of a vinylpyrrolidone polymer into the formation to condition the reservoir, in a first step injecting an aqueous surfactant solution into the formation and recovering hydrocarbons via the said production well. The pretreatment of the formation with the vinylpyrrolidone polymer reduces the consumption or loss of surfactant and thus improves the efficiency of the process. Optionally, after the injection of the aqueous surfactant solution an aqueous drive fluid is injected into the formation.
Assignee:
Texaco Inc
Patent Number(s):
US 4207946
OSTI ID:
5771404
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
AMIDES
AQUEOUS SOLUTIONS
AZOLES
BLOOD SUBSTITUTES
DISPERSIONS
DRUGS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
HEMATOLOGIC AGENTS
HETEROCYCLIC COMPOUNDS
INJECTION WELLS
LACTAMS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
POLYMERS
POLYVINYLS
PVP
PYRROLES
PYRROLIDONES
RECOVERY
SOLUTIONS
SURFACTANTS
WATERFLOODING
WELLS