METHOD OF DEGRADING CELLULOSE-CONTAINING FLUIDS DURING COMPLETION OPERATIONS OF OIL AND GAS WELLS

A method is shown for reducing the viscosity of a cellulose-containing fluid used during workover, fracturing or well completion operations. An enzyme system is used to degrade the polymer, whereby the fluid can be removed from the subterranean formation to the well surface. The enzyme systems are e...

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Bibliographic Details
Main Authors BEALL, BRIAN, B, TJON-JOE-PIN, ROBERT, M
Format Patent
LanguageEnglish
French
Published 18.07.1996
Edition6
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:A method is shown for reducing the viscosity of a cellulose-containing fluid used during workover, fracturing or well completion operations. An enzyme system is used to degrade the polymer, whereby the fluid can be removed from the subterranean formation to the well surface. The enzyme systems are effective over broad pH and temperature ranges. L'invention décrit un procédé pour réduire la viscosité d'un fluide contenant de la cellulose utilisé au cours d'opérations de reconditionnement, de fracturation ou de complétion de puits. Un système enzymatique est utilisé pour dégrader le polymère, ce qui permet d'enlever le fluide de la formation souterraine et de l'amener à la surface du puits. Lesdits systèmes enzymatiques sont efficaces sur de larges gammes de pH et de températures.
Bibliography:Application Number: WO1995US16397