Wells – Processes – Distinct – separate injection and producing wells
Patent
1986-03-21
1987-08-18
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166273, 166302, E21B 3600, E21B 4317
Patent
active
046870598
ABSTRACT:
An enhanced oil recovery process comprises injection of water into a subterranean formation followed by the injection of a surfactant such as a micellar fluid and a thickening agent such as a polymer solution to drive oil toward a production well. Temperatures and pressures of injection of the water, surfactant, and thickening agent are controlled so as to thermoelastically fracture the formation behind the oil-water bank to increase the injectivity rate and propagation rate of the slugs of fluids behind the oil-water bank to control the shape of the flood front and to minimize misdirected fracturing ahead of the flood front.
REFERENCES:
patent: 4476932 (1984-10-01), Emery
patent: 4589491 (1986-05-01), Perkins
Perkins, T. K. et al., "Changes in Earth Stresses Around a Wellbore Caused by Radially Symmetrical Pressure and Temperature Gradients", SPE Journal, Apr. 1984.
Perkins, T. K. et al., "The Effect of Thermoelastic Stresses on Injection Well Fracturing", SPE Journal, Feb. 1985.
Gonzalez Jay A.
Pathak Prabodh
Perkins Thomas K.
Salter Stephen J.
Atlantic Richfield Company
Kisliuk Bruce M.
Martin Michael E.
Novosad Stephen J.
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