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    COMPOSITIONS AND METHODS FOR BREAKING A VISCOSITY INCREASING POLYMER AT VERY LOW TEMPERATURE USED IN DOWNHOLE WELL APPLICATIONS
    2.
    发明公开
    COMPOSITIONS AND METHODS FOR BREAKING A VISCOSITY INCREASING POLYMER AT VERY LOW TEMPERATURE USED IN DOWNHOLE WELL APPLICATIONS 有权
    IN孔应用使用的组合物和方法打破了高粘度化聚合物非常低的温度

    公开(公告)号：EP2121869A1

    公开(公告)日：2009-11-25

    申请号：EP08701857.8

    申请日：2008-01-17

    申请人： Halliburton Energy Services, Inc.

    发明人： SANDERS, Michael W. ,  MUNDY, Jeffrey L. ,  FOO, Fong Fong ,  SAINI, Rajesh K.

    IPC分类号： C09K8/62 ,  C09K8/68 ,  C09K8/80 ,  C09K8/035 ,  C09K8/76

    CPC分类号： C09K8/035 ,  C09K8/62 ,  C09K8/68 ,  C09K8/76 ,  C09K8/80

    摘要： 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. 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 1000F (38°C).