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1.发明申请公开(公告)号：US20120322700A1
公开(公告)日：2012-12-20
申请号：US13597554
申请日：2012-08-29
IPC分类号： C09K8/62
CPC分类号： C09K8/602 , C09K8/665 , C09K8/68 , C09K8/74 , C09K8/845 , C09K8/86 , C09K2208/10 , C09K2208/30
摘要： An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkaline earth metal oxide alkaline earth metal hydroxide, alkali metal oxides, alkali metal hydroxides transition metal oxides, transition metal hydroxides, post-transition metal oxides, and post-transition metal hydroxides. These fluids are more stable and have a reduced or no tendency to precipitate, particularly at elevated temperatures. The additives may reduce the amount of VES required to maintain a given viscosity. These stabilized, enhanced, aqueous viscoelastic fluids may be used as treatment fluids for subterranean hydrocarbon formations, such as in hydraulic fracturing. The particle size of the magnesium oxide or other agent may be nanometer scale, which scale may provide unique particle charges that use chemisorption, crosslinking and/or other chemistries to associate and stabilize the VES fluids.
摘要翻译： 用粘弹性表面活性剂（VES）凝胶化的水性粘弹性流体通过有效量的碱土金属氧化物碱土金属氢氧化物，碱金属氧化物，碱金属氢氧化物过渡金属氧化物，过渡金属氢氧化物，转变后稳定和改善 金属氧化物和过渡后金属氢氧化物。 这些流体更稳定，并且具有降低或没有沉淀的倾向，特别是在升高的温度下。 添加剂可以减少维持给定粘度所需的VES的量。 这些稳定的，增强的水性粘弹性流体可以用作地下烃地层的处理流体，例如在水力压裂中。 氧化镁或其它试剂的粒径可以是纳米级，其规模可以提供使用化学吸附，交联和/或其它化学物质来缔合和稳定VES流体的独特的颗粒电荷。
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公开(公告)号：US20090253596A1
公开(公告)日：2009-10-08
申请号：US12489904
申请日：2009-06-23
IPC分类号： C09K8/76
CPC分类号： C09K8/665 , C09K8/68 , C09K2208/30
摘要： Alkaline earth metal compounds may be fluid loss control agents for viscoelastic surfactant (VES) fluids used for well completion or stimulation in hydrocarbon recovery operations. The VES fluid may further include proppant or gravel, if it is intended for use as a fracturing fluid or a gravel packing fluid, although such uses do not require that the fluid contain proppant or gravel. The fluid loss control agents may include, but not be limited to, oxides and hydroxides of alkaline earth metal, and in one case magnesium oxide where the particle size of the magnesium oxide is between 1 nanometer to 0.4 millimeter. The fluid loss agent appears to associate with the VES micelles and together form a novel pseudo-filter cake crosslinked-like viscous fluid layer that limits further VES fluid flow into the porous media. The fluid loss control agent solid particles may be added along with VES fluids.
摘要翻译： 碱土金属化合物可以是用于油气回收操作中完井或刺激的粘弹性表面活性剂（VES）流体的流体损失控制剂。 VES流体可以进一步包括支撑剂或砾石，如果它旨在用作压裂流体或砾石填充流体，尽管这样的用途不需要流体包含支撑剂或砾石。 流体损失控制剂可以包括但不限于碱土金属的氧化物和氢氧化物，在一种情况下，可以包括氧化镁的粒度在1纳米到0.4毫米之间的氧化镁。 流体损失剂似乎与VES胶束缔合，并一起形成了一种新型的伪滤饼交联状粘性流体层，其限制了进一步的VES流体流入多孔介质。 流体损失控制剂固体颗粒可以与VES流体一起加入。
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