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    • 21. 发明申请
    • COMPOSITIONS AND METHODS FOR BREAKING A VISCOSITY INCREASING POLYMER AT VERY LOW TEMPERATURE USED IN DOWNHOLE WELL APPLICATIONS
    • 组合物和方法,用于破坏粘度增加聚合物在非常低的温度下使用在井下良好的应用
    • US20110152132A1
    • 2011-06-23
    • US13039777
    • 2011-03-03
    • Michael W. SandersJeffrey L. MundyFong Fong FooRajesh K. Saini
    • Michael W. SandersJeffrey L. MundyFong Fong FooRajesh K. Saini
    • C09K8/00
    • C09K8/524C09K8/68C09K8/90C09K2208/26
    • A composition for treating a portion of a wellbore or a portion of a subterranean formation is provided, the composition comprising: (a) water; (b) a source of hydrogen peroxide, and (c) an activator for the source of hydrogen peroxide; wherein the pH of the composition is adjusted to be within an appropriate range for the type of activator. A method for treating a portion of a wellbore or a portion of a subterranean formation, the method comprising the steps of: forming or providing a composition comprising: (a) water; (b) a source of hydrogen peroxide, and (c) an activator for the source of hydrogen peroxide; wherein the pH of the composition is adjusted within an appropriate range for the type of activator; and introducing the composition through a wellbore to treat a portion of a wellbore or a portion of a subterranean formation. The activator can be a water-soluble alkanoyl-donor compound or a chelated transition metal. Preferably, the composition further comprises an iron chelating agent. The composition and method are adapted for breaking a viscosity increasing polymer, such as xanthan. The method has particular applications where the static temperature of the portion of the wellbore or the portion of the subterranean formation to be treated is less than 100° F. (38° C.).
    • 提供了一种用于处理一部分井孔或一部分地层的组合物,该组合物包含:(a)水; (b)过氧化氢源,和(c)用于过氧化氢源的活化剂; 其中将组合物的pH调节到活化剂类型的适当范围内。 一种用于处理井筒或地下地层的一部分的一部分的方法,所述方法包括以下步骤:形成或提供组合物,其包含:(a)水; (b)过氧化氢源,和(c)用于过氧化氢源的活化剂; 其中将组合物的pH调节到活化剂类型的适当范围内; 并通过井筒引入组合物以处理井筒或地下地层的一部分的一部分。 活化剂可以是水溶性烷酰基供体化合物或螯合过渡金属。 优选地,组合物还包含铁螯合剂。 该组合物和方法适用于破坏增粘聚合物如黄原胶。 该方法具有特定的应用,其中井眼部分或待处理的地下部分的静态温度小于100°F(38℃)。