Wells – Processes – Material placed in pores of formation to treat resident...
Patent
1990-05-23
1991-08-13
Suchfield, George A.
Wells
Processes
Material placed in pores of formation to treat resident...
1663051, 252 8552, E21B 4312
Patent
active
050388614
ABSTRACT:
A method is disclosed for prolonging the useful life of scale inhibitors injected within a formation. This method involves injecting aqueous solution of polyquaternary amines into the formation. This solution of polyquaternary amines can be injected either prior to or simultaneously with the injection of the scale inhibitors. The scale inhibitors are preferably non-polymeric scale inhibitors. Preferably, the polyquaternary amine is a poly(dimethylamine-co-epichlorohydrin) or a poly(diallyldimethylammonium chloride).
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D. R. Underdown et al., "Evaluation of Calcium Carbonate Scale Inhibitors For Prudhoe Bay, Alaska" Society of Petroleum Engineers, SPE 15658, Oct. 1986.
Chevron Research and Technology Company
Keeling Edward J.
Schaal Ernest A.
Suchfield George A.
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