ACID TREATMENT REMOVES ZINC SULFIDE SCALE RESTRICTION

Kim Biggs Kerr McGee Corp. Lafayette, La. Dave Allison Otis Engineering Corp. Lafayette, La. William G.F. Ford Halliburton Services Duncan, Okla. Removal of zinc sulfide (ZnS) scale with acid restored an offshore Louisiana well's production to original rates. The zinc sulfide scale was determined to be in the near well bore area. The selected acid had been proven to control iron sulfide (FeS) scales in sour wells without causing harm to surface production equipment, tubing, and other

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