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    • 71. 发明公开
    • INCREASING THE VISCOSITY OF VISCOELASTIC FLUIDS
    • 增加粘弹性流体的粘度
    • EP2571957A2
    • 2013-03-27
    • EP11783909.2
    • 2011-04-15
    • Baker Hughes Incorporated
    • HUANG, TianpingCREWS, James, B.AGRAWAL, Gurav
    • C09K8/584E21B43/16
    • C09K8/68C09K8/06C09K8/40C09K8/506C09K8/52C09K8/602C09K2208/30
    • In hydrocarbon recovery applications, viscoelastic surfactant (VES) gelled fluids may be preheated to a temperature that will increase viscosity of the VES gelled fluid. The preheated VES gelled fluid retains at least a portion of its preheated viscosity when cooled such as by introduction into a low temperature condition. In an embodiment, the VES gelled fluid may be a drilling fluid, completion fluid, or fracturing fluid, and the low temperature condition may be an offshore operation, an operation in a locality having a cold climate, and/or a shallow oil, gas, or both land-based operation where the formation temperature is 120 °F or less. The surfactant in the VES gelled fluid may be one or more of an amine, amine salt, quaternary ammonium salt, betaine, amidoamine oxide, amine oxide, and combinations thereof.
    • 在碳氢化合物回收应用中,粘弹性表面活性剂(VES)凝胶化流体可被预热到会增加VES凝胶化流体粘度的温度。 当例如通过引入低温条件而冷却时,预热的VES凝胶化流体保持其预热粘度的至少一部分。 在一个实施方案中,VES胶凝流体可以是钻井液,完井液或压裂液,并且低温条件可以是海上操作,具有寒冷气候的地区的操作和/或浅油气 或地层温度在120°F以下的陆基作业。 VES凝胶化流体中的表面活性剂可以是胺,胺盐,季铵盐,甜菜碱,酰胺胺氧化物,氧化胺及其组合中的一种或多种。