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    • 3. 发明申请
    • Controlling chlorite or hypochlorite break rate of well treatment fluids using magnesium or calcium ions
    • 使用镁离子或钙离子控制井处理液的亚氯酸盐或次氯酸盐破裂率
    • US20050205259A1
    • 2005-09-22
    • US10681976
    • 2004-03-22
    • Ronald PowellRobert Hauge
    • Ronald PowellRobert Hauge
    • C09K8/66C09K8/68C09K8/70C09K8/90E21B43/25E21B43/26
    • C09K8/90C09K8/665C09K8/685C09K8/706
    • The present invention provides methods and compositions for treating a subterranean formation penetrated by a well. The method comprising the steps of: (a) forming a treatment fluid, and (b) introducing the treatment fluid into the well and into contact with the formation. According to one aspect, the treatment fluid comprises: (1) water; (2) a water-soluble polysaccharide capable of increasing the viscosity of the water and present in a sufficient concentration to increase the viscosity of the water or a water-soluble polysaccharide and a crosslinking agent for the water-soluble polysaccharide, which are present in a sufficient concentration to effect crosslinking of the of the polysaccharide and increase the viscosity of the water; (3) a breaker comprising at least one member selected from the group consisting of a source of chlorite ions and a source of hypochlorite ions, wherein the breaker is present in a sufficient concentration to break the treatment fluid after introduction of the fluid into the subterranean formation; and (4) a breaker moderator comprising at least one member selected from the group consisting of a source of magnesium ions and a source of calcium ions, wherein the breaker moderator is present in a sufficient concentration to control the break rate of the fluid.
    • 本发明提供了用于处理由井渗透的地层的方法和组合物。 该方法包括以下步骤:(a)形成处理流体,和(b)将处理流体引入井并与地层接触。 根据一个方面,处理流体包括:(1)水; (2)能够增加水的粘度并以足够的浓度存在以增加水或水溶性多糖和用于水溶性多糖的交联剂的粘度的水溶性多糖,其存在于 足够的浓度来实现多糖的交联并增加水的粘度; (3)包含至少一种选自亚氯酸根离子源和次氯酸根离子的成员的破碎机,其中所述破碎剂以足够的浓度存在,以将流体引入地下之后破坏处理流体 形成; 和(4)包含选自镁离子源和钙离子源中的至少一种的断路器调节剂,其中所述断路器缓和剂以足够的浓度存在以控制流体的断裂速率。