Method of clay stabilization in enhanced oil recovery

Details Method of clay stabilization in enhanced oil recovery Method of clay stabilization in enhanced oil recovery

1982-04-19

1984-05-08

Nucker, Christine M.

Compositions

Leather or fur treating

166273, 166274, 166275, 166305R, 252 855R, E21B 4322, E21B 4312, E21B 4325

Patent

active

044473427

ABSTRACT:
A method of preventing permeability damage due to clay swelling, disintegration and migration in subterranean formations producing oil and gas, where such formations are to be the subject of enhanced oil recovery techniques using anionic or caustic flood chemicals. Prior to the use of such enhanced oil recovery techniques, a cationic organic polymer capable of stabilizing clays is introduced into an oil reservoir treatment area followed by introduction of a sufficient amount of a non-anionic aqueous spacer fluid to cause the cationic organic polymer to reorient itself on the reservoir clays in a substantially monomolecular layer and manner such that it will continue to stabilize the reservoir clays but will not substantially react with the anionic or caustic flood chemicals to form permeability damaging precipitates or to decompose thereby reducing its clay stabilization effectiveness.

REFERENCES:
patent: 3710863 (1973-01-01), Webster et al.
patent: 4366071 (1982-12-01), McLaughlin et al.

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