Precipitation of scale inhibitors in subterranean formations

Details Precipitation of scale inhibitors in subterranean formations Precipitation of scale inhibitors in subterranean formations

1993-03-31

1994-09-13

Suchfield, George A.

Wells

Processes

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

166300, 252 8552, 252 8553, E21B 4312, E21B 4322

Patent

active

053460103

ABSTRACT:
Scale inhibitors are precipitated in a formation by injection in an acidic solution comprising a base generating component and a chelating agent. The inhibitor is preferably a calcium salt of an organic phosphonate. The chelating agent prevents iron ions from causing premature hydrolysis of the base generating component.

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