Inhibition of scale growth utilizing a dual polymer composition

Details Inhibition of scale growth utilizing a dual polymer composition Inhibition of scale growth utilizing a dual polymer composition

1992-08-20

1993-11-23

Suchfield, George A.

Wells

Processes

Material placed in pores of formation to treat resident...

166310, 210698, 210701, 210747, 252 8552, C02F 510, E21B 4312

Patent

active

052635414

ABSTRACT:
A method for inhibiting inorganic sulfate scale growth in an aqueous fluid present within or produced from a subterranean formation is performed by contacting the aqueous fluid in situ with a scale inhibitor composition containing two homopolymers in solution within an aqueous liquid medium. The first homopolymer is a polyvinyl sulfonate and the second homopolymer is a polyacrylic acid. The weight ratio of the first homopolymer to second homopolymer is preferably at least about 1:1 and the aqueous fluid being contacted by the composition typically contains a relatively high concentration of precursor ions of inorganic sulfate scale, including scale-forming inorganic cations and scale-forming sulfate anions.

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