Wells – Processes – Specific low fluid loss feature for fluid attacking formation
Patent
1975-12-24
1978-01-17
Novosad, Stephen J.
Wells
Processes
Specific low fluid loss feature for fluid attacking formation
166302, 166307, 252 855C, E21B 4326, E21B 4327
Patent
active
040687198
ABSTRACT:
Gelled acidic compositions suitable for either matrix acidizing or fracture-acidizing of subterranean formations, and methods of using said compositions, are provided. Said compositions comprise water, a water-dispersible polymer of acrylamide, an acid, a water soluble compound of a polyvalent metal wherein the metal can be reduced to a lower polyvalent valence state and cause gelation of the water containing said polymer and said acid, and a reducing agent capable of reducing said metal and causing said gelation.
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Harris et al., High-Concentration Hydrochloric Acid Aids Stimulation Results in Carbonate Formations, Journal of Petroleum Technology, Oct., 1966, pp. 1291-1296.
Clampitt Richard L.
Hessert James E.
Novosad Stephen J.
Phillips Petroleum Company
Suchfield George A.
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