Wells – Processes – Cementing – plugging or consolidating
Patent
1980-06-30
1981-11-24
Novosad, Stephen J.
Wells
Processes
Cementing, plugging or consolidating
166281, 166300, 166307, E21B 33138
Patent
active
043018670
ABSTRACT:
A caustic aqueous solution having an amphoteric metal ion dissolved therein is injected into a subterranean sandstone formation wherein the caustic interacts with the sandstone formation to form caustic soluble silicates. The amphoteric metal ion reacts with the caustic soluble silicates to form an amphoteric metal silicate precipitate which preferentially reduces the permeability of the relatively highly permeable zones of the formation thereby improving conformance and flow profiles of fluids subsequently injected into or produced from the formation.
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Michell J. Sienko and Robert A. Plane, Chemistry: Principles and Properties, McGraw-Hill, Inc., 1966, p. 468.
Gucwa Paul R.
Stonecipher Sharon A.
Sydansk Robert D.
Hummel Jack L.
Marathon Oil Company
Novosad Stephen J.
Suchfield George A.
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