Delayed breaker for viscoelastic surfactant-based fluids
Compositions and methods are provided for delayed breaking of viscoelastic surfactant gels inside subterranean formations. Breaking is accomplished without mechanical intervention or use of a second fluid. The delayed breaking agent is selected from alkyl ether phosphates and salts thereof, alkylary...
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| creator | Wolf, Nick Henry Li, Lingling Zhou, Jian Gadberry, James Frederic |
| description | Compositions and methods are provided for delayed breaking of viscoelastic surfactant gels inside subterranean formations. Breaking is accomplished without mechanical intervention or use of a second fluid. The delayed breaking agent is selected from alkyl ether phosphates and salts thereof, alkylaryl ether phosphates and salts thereof, alkyl sulfates and salts thereof, alkylaryl sulfates and salts thereof, alkyl ether sulfates and salts thereof, alkylaryl ether sulfates and salts thereof, and mixtures of any of the foregoing. The viscoelastic surfactant can be a zwitterionic surfactant, and can be selected from the group consisting of sultaines, betaines, and amidoamine oxides. |
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Breaking is accomplished without mechanical intervention or use of a second fluid. The delayed breaking agent is selected from alkyl ether phosphates and salts thereof, alkylaryl ether phosphates and salts thereof, alkyl sulfates and salts thereof, alkylaryl sulfates and salts thereof, alkyl ether sulfates and salts thereof, alkylaryl ether sulfates and salts thereof, and mixtures of any of the foregoing. 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Breaking is accomplished without mechanical intervention or use of a second fluid. The delayed breaking agent is selected from alkyl ether phosphates and salts thereof, alkylaryl ether phosphates and salts thereof, alkyl sulfates and salts thereof, alkylaryl sulfates and salts thereof, alkyl ether sulfates and salts thereof, alkylaryl ether sulfates and salts thereof, and mixtures of any of the foregoing. The viscoelastic surfactant can be a zwitterionic surfactant, and can be selected from the group consisting of sultaines, betaines, and amidoamine oxides.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADHESIVES CHEMISTRY DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MINING MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PAINTS POLISHES |
| title | Delayed breaker for viscoelastic surfactant-based fluids |
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