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Process for secondary oil recovery utilizing propoxylated ethoxylated surfactants in seawater

Patent ·
OSTI ID:6916080
This patent describes a process for enhancing the injectivity of an injection well and thereby accelerating the recovery of oil by a waterflood process from an oil-bearing subterranean formation penetrated by at least one injection well and at one production well wherein the near wellbore area of the formation penetrated by the injection well has a low formation permeability to water as compared to the formation's absolute permeability. The method comprising: injecting into the formation through an injection well, seawater containing a surfactant in an amount effective to sweep the residual oil from the formation pore spaces in the near wellbore area and to thereby improve the water injectivity of the infection well.
Assignee:
Conoco Inc., Ponca City, OK
Patent Number(s):
A; US 4886120
Application Number:
PPN: US 7-305306A
OSTI ID:
6916080
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CHEMICAL COMPOSITION
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
OIL WELLS
OXYGEN COMPOUNDS
PETROLEUM
RECOVERY
SEAWATER
STIMULATION
SURFACTANTS
WATER
WATERFLOODING
WELL STIMULATION
WELLS