SECONDARY DEPOSITION OF IRON COMPOUNDS FOLLOWING ACIDIZING TREATMENT

Abstract

Recent laboratory and field research studies have been conducted to determine nature of iron precipitation from spent acid and to evaluate sequestering agents commonly used to prevent secondary deposition; iron can be introduced into acid solutions from three sources-corrosion, iron scales, and minerals in formation; tests were developed to determine effectiveness of presently marketed iron stabilizing agents to include lactic-, acetic- , citric- , and ethylenediaminetetracetic acid salts.