Wells – Processes – Distinct – separate injection and producing wells
Patent
1988-01-04
1989-05-16
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166274, 166295, 166300, E21B 4322, E21B 33138
Patent
active
048301086
ABSTRACT:
A method for reducing the permeability in a desired area of a formation wherein a foamed gel is formed in-situ by injecting a solution into said formation. Said solution comprises a gellable composition including water; a cross linkable polysaccharide biopolymer; an aminoplast resin which reinforces said biopolymer; and sufficient transitional metal ions to form a gel of the desired size and strength. The gelled solution is foamed by including therein a chemical surfactant, and a chemical blowing agent. Once in the formation to the desired depth, the chemical blowing agent decomposes and generates a gas sufficient to foam the gelled solution. The gelled foam stiffens and reduces the permeability in a desired area.
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Hazlett Randy D.
Shu Paul
Malone Charles A.
McKillop Alexander J.
Mobil Oil Corp.
Speciale Charles J.
Suchfield George A.
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