Oil recovery process using a polymer gel

Details Oil recovery process using a polymer gel Oil recovery process using a polymer gel

1983-08-22

1985-10-22

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

405264, E21B 33138, E02D 312

Patent

active

045482721

ABSTRACT:
A reducing agent is added to an aqueous medium containing a mixture of undried partially hydrolyzed polyacrylamide and an oxidizing agent. The reducing agent and oxidizing agent act as a redox catalyst system to cross link the polymer and form a polymer gel. Gelation time is controlled by maintaining the components of the gel-forming mixture at predetermined concentrations, reaction ratios and pH. The gel-forming mixture is applied to a porous matrix such as a subterranean hydrocarbon-bearing formation where the mixture gels in situ at a controlled rate to reduce the permeability of the porous matrix.

REFERENCES:
patent: Re29716 (1978-08-01), Clampitt
patent: 3039529 (1962-06-01), McKennon
patent: 3782467 (1974-01-01), Hessert
patent: 3785437 (1974-01-01), Clampitt et al.
patent: 3795276 (1974-03-01), Eilers et al.
patent: 4040484 (1977-08-01), Hessert
Chyi-Gang Huang, M.S. Thesis, "A Study of the Gelation of Polyacrylamide Through the Participation of Chromium (III)", 1980, University of Kansas.

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