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    • 3. 发明授权
    • Methods and compositions for controlling the viscosity of viscoelastic surfactant fluids
    • 用于控制粘弹性表面活性剂流体粘度的方法和组合物
    • US07261160B2
    • 2007-08-28
    • US11225536
    • 2005-09-13
    • Thomas D. WeltonRick D. GdanskiRichard W. Pauls
    • Thomas D. WeltonRick D. GdanskiRichard W. Pauls
    • E21B43/27C09K8/60
    • C09K8/68C09K8/12C09K2208/30
    • Viscoelastic surfactant fluids, and methods of using such fluids and controlling the viscosity thereof. In one embodiment, the methods of the present invention comprise: providing a viscoelastic surfactant fluid that comprises an aqueous-base fluid, and a surfactant; providing a metal ion having at least two oxidation states wherein at least one of the oxidation states interferes with the ability of the surfactant to form a viscosifying micelle, wherein at least a portion of the metal ion is present in an oxidation state that interferes with the ability of the surfactant to form a viscosifying micelle; allowing the metal ion to interact with viscoelastic surfactant fluid so as to decrease the ability of the surfactant to form a viscosifying micelle; and introducing the viscoelastic surfactant fluid into at least a portion of a subterranean formation.
    • 粘弹性表面活性剂流体,以及使用这种流体并控制其粘度的方法。 在一个实施方案中,本发明的方法包括:提供包含水基液体和表面活性剂的粘弹性表面活性剂流体; 提供具有至少两种氧化态的金属离子,其中至少一种氧化态干扰表面活性剂形成增粘胶束的能力,其中金属离子的至少一部分以氧化态存在,其干扰 表面活性剂形成增粘胶束的能力; 使金属离子与粘弹性表面活性剂流体相互作用,降低表面活性剂形成增粘胶束的能力; 以及将所述粘弹性表面活性剂流体引入到地层的至少一部分中。