Schlumberger

Product Sheet: WELLZYME NS

Date: 8/1/2005

WELLZYME NS starch‐specific enzyme isa complex 3‐Dmolecule specially engineered to break down the starch component in the filter cake established by a reservoir drill‐in fluid (RDF). It is a large, specialized protein produced by living cells. It eliminates corrosion, wormholing, and safety and health liabilities typically associated with the use of strong acids and oxidizing breakers. WELLZYME NS enzyme can be used in combination with chelants to degrade starch and calcium carbonate components of the filter cake.

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