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INTERNAL POLYMERIC BREAKER FOR VISCOELASTIC SURFACTANT-BASED FLUIDS
INTERNAL POLYMERIC BREAKER FOR VISCOELASTIC SURFACTANT-BASED FLUIDS
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机译:用于基于粘弹性表面活性剂的流体的内部聚合物破胶剂
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摘要
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 a hydrophobically modified alkali swellable emulsion polymer, which can be a copolymer comprising acidic monomers, nonionic monomers, and associative monomers. 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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