Method for sweep improvement utilizing gel-forming lignins

Details Method for sweep improvement utilizing gel-forming lignins Method for sweep improvement utilizing gel-forming lignins

1981-05-26

1984-01-31

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166270, 166300, E21B 33138, E21B 4322

Patent

active

044284292

ABSTRACT:
Highly conductive zones of subterranean formations are treated with aqueous fluids containing gel-forming amounts of water-soluble basic lignins. Suitable treating fluids contain about 2 to about 8 wt. % sodium hydroxide solution. The lignin solutions gel within the formation due to reactivity with oil-water and/or the rock matrix. Alternately, following the injection of the gel-forming fluids, acidic gas is injected to cause gel formation.

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patent: 3285338 (1966-11-01), Boston
patent: 3841405 (1974-10-01), Moote et al.
patent: 3897827 (1975-08-01), Felber et al.
patent: 4257813 (1981-03-01), Lawrence et al.
patent: 4313500 (1982-02-01), Johnson, Jr. et al.

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