Process for emulsion flooding of petroleum reservoirs

Details Process for emulsion flooding of petroleum reservoirs Process for emulsion flooding of petroleum reservoirs

1983-05-16

1984-12-18

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, E21B 4322

Patent

active

044886020

ABSTRACT:
A process for emulsion flooding of petroleum reservoirs comprising injecting a thermodynamically stable microemulsion consisting of oil, a non-ionic surfactant and water which optionally contains salts dissolved in any desired concentrations, into an injection well; driving injected microemulsion bank through the reservoir by means of water which likewise may contain salts dissolved in any desired concentrations. The microemulsion bank in contact with the water driving the bank forms an excess phase with a high water content, a low surfactant content and low oil content, and has such a viscosity sufficient to prevent the penetration of the subsequent water into the microemulsion bank which would cause a decrease of its flowability and its ability to displace oil.

REFERENCES:
patent: 3126952 (1964-03-01), Jones
patent: 3307628 (1967-03-01), Sena
patent: 3455386 (1969-07-01), Reisberg
patent: 3520366 (1970-07-01), Jones
patent: 3670819 (1972-06-01), Dauben et al.
patent: 4269271 (1981-05-01), Shupe et al.
patent: 4337159 (1982-06-01), Reed et al.

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