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    • 64. 发明申请
    • Inhibiting Salting Out of Diutan or Scleroglucan in Well Treatment
    • 抑制唾液或硬皮病在盐水处理中的盐析
    • US20140378353A1
    • 2014-12-25
    • US13924857
    • 2013-06-24
    • Halliburton Energy Services, Inc.
    • Lalit Pandurang Salgaonkar
    • C09K8/90
    • C09K8/90C09K8/08C09K8/514C09K8/5758C09K8/68
    • A fluid viscosified with diutan or scleroglucan is provided for use in a well, the fluid including: (i) water; (ii) one or more salts selected from the group consisting of alkali metal halide salts, alkaline earth metal halide salts, and any combination thereof; (iii) a viscosifier selected from the group consisting of diutan, a diutan derivative, scleroglucan, a scleroglucan derivative, and any combination thereof; and (iv) a delayed-release source of a weak acid; wherein the initial pH of the fluid is at least 6. In addition, a method of treating a portion of a well includes the steps of: (A) forming such a fluid; and (B) introducing the fluid into the portion of the well. The fluid has rheological properties that can be adapted, for example, to well treatments such as gravel packing at higher temperature and in higher density brines while avoiding salting out of the viscosifier.
    • 为了在井中使用用二萜或硬葡聚糖增稠的流体,流体包括:(i)水; (ii)一种或多种选自碱金属卤化物盐,碱土金属卤化物盐及其任何组合的盐; (iii)选自二脱氧尿苷,二替代衍生物,硬葡聚糖,硬葡聚糖衍生物及其任何组合的增粘剂; 和(iv)弱酸的延迟释放源; 其中流体的初始pH为至少6.另外,处理井的一部分的方法包括以下步骤:(A)形成这样的流体; 和(B)将流体引入井的部分。 该流体具有流变性能,其可以适应于例如在较高温度下的良好处理,例如砾石填充和较高密度的盐水,同时避免从增粘剂中脱盐。