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    • 23. 发明授权
    • Self-diverting high-rate water packs
    • 自转高速水包
    • US08720555B2
    • 2014-05-13
    • US13252373
    • 2011-10-04
    • Feng LiangBradley L. ToddRajesh K. SainiStanley J. Heath
    • Feng LiangBradley L. ToddRajesh K. SainiStanley J. Heath
    • E21B43/25E21B43/267C09K8/80
    • C09K8/56C09K8/68C09K8/805E21B43/04
    • A method for diverting fluids across a perforation tunnel in high-rate water pack operations may include providing a wellbore extending into a subterranean formation, wherein a perforation tunnel provides a fluid connection between the wellbore and the subterranean formation; providing a diverting particulate that comprises a degradable plasticized polymer coating on a particulate; placing the diverting particulate into the perforation tunnel, wherein the step of placing the diverting particulate forms a particulate pack within the subterranean formation and the perforation tunnel; allowing the degradable plasticized polymer coating to deform and fill the interstitial spaces within the particulate pack in the perforation tunnel such that the fluid conductivity between the wellbore and the subterranean formation is substantially blocked; and allowing the plasticized polymer coating to degrade over time thereby substantially restoring the fluid conductivity between the wellbore and the subterranean formation.
    • 在高速水包装操作中将流体转移穿过穿孔隧道的方法可以包括提供延伸到地下地层中的井眼,其中穿孔在井筒和地下地层之间提供流体连接; 提供包含颗粒上的可降解塑化聚合物涂层的转向颗粒; 将转向颗粒放置到穿孔隧道中,其中放置转向颗粒的步骤在地层和穿孔隧道内形成颗粒状包装; 允许可降解塑化聚合物涂层变形并填充穿孔隧道内的颗粒包装内的间隙空间,使得井筒和地下地层之间的流体传导性基本上被阻挡; 并且允许塑化的聚合物涂层随着时间的推移而降解,从而基本上恢复井筒和地下地层之间的流体传导性。
    • 25. 发明授权
    • Compositions and methods for breaking a viscosity increasing polymer at very low temperature used in downhole well applications
    • 用于在井下井应用中使用的非常低的温度下破坏增粘聚合物的组合物和方法
    • US08415278B2
    • 2013-04-09
    • US13039777
    • 2011-03-03
    • Michael W. SandersJeffrey L. MundyFong Fong FooRajesh K. Saini
    • Michael W. SandersJeffrey L. MundyFong Fong FooRajesh K. Saini
    • E21B43/26C09K8/68
    • 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℃)。