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Zeta Potential Altering System for Increased Fluid Recovery, Production, and Fines Control

机译:Zeta电位变更系统可提高流体回收,生产和细度控制

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This paper presents a new zeta potential altering system that is based on an inner salt developed to enhance the water flowback recovery on borate and slick-water frac jobs. The system also aids in the control of fines. The mechanism of this system is to modify the zeta potential on particles such as frac sand from -50 mV, or coal from -28 mV, to more neutral values. This modification helps increase the potential for particle agglomeration and changes in the sand pack in the fracture to increase fluid recovery and production. Results from lab studies have shown that the flow rate ratio for a 2% KCl solution through sand packs (treatedot treated) increased up to 45% when treated with 6.0 gal of chemical per 1,000 lb of frac sand. Similar results were obtained on conductivity tests using ceramic proppant, improving conductivity from 7,150 mD-ft to 11,387 mD-ft at 2,000 psi closure stress. This new system does not interfere with fracturing fluid rheological profiles for borate systems and improves friction reducing characteristics in slick-water systems. The system was tested in the field on a slick-water job, where the additive was mixed in the blender tub.
机译:本文介绍了一种新的zeta电位改变系统,该系统基于开发的内盐增强了硼酸盐和浮水压裂作业中的水返排回收率。该系统还有助于控制罚款。该系统的机制是将颗粒上的zeta电位(例如,从-50 mV起的压裂砂或从-28 mV起的煤)修改为更中性的值。这种改进有助于增加潜在的颗粒团聚和裂缝中砂砾层的变化,从而提高流体采收率和产量。实验室研究的结果表明,当每1000磅压裂砂用6.0加仑的化学品处理时,通过沙包(处理过/未处理)的2%KCl溶液的流速比提高到45%。在使用陶瓷支撑剂的电导率测试中获得了相似的结果,在2000 psi的闭合应力下,电导率从7,150 mD-ft提高到11,387 mD-ft。该新系统不会干扰硼酸盐系统的压裂液流变性,并改善了滑水系统的降低摩擦特性。该系统在滑水作业现场进行了测试,其中添加剂在搅拌桶中混合。

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