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一种用于涂层支撑剂的新型流体表面调整体系已开发研制出来 ,它极大地提高了表面摩阻 ,制约了周围颗粒。因涂层支撑剂颗粒间表面的高摩阻可经受高流速 ,从而可最大限度地减小压裂增产处理后的返排现象。按照现场试验结果 ,常规压裂处理后 ,当表面调整材料用作返排控制剂时 ,它可用在较侵蚀性的返排程序中。该处理方法不影响导流能力 ,事实上在闭合应力低于 4 0 0 0lb/in2 时会提高支撑剂的导流能力 ,实验当中垂向支撑剂的良好分布证实了表面调整是如何阻止支撑剂沉降的。已经存在在支撑剂的所有细粒 (地层中产生的或裂缝闭合点支撑剂破碎而产生的 )都粘附在处理的支撑剂上 ,从而阻止它们运移并堵塞支撑剂充填层的孔喉。这种独特的涂层技术通过改善某种流体中压裂破胶剂活性更进一步提高了导流能力 ,并能在增产处理后快速有效地洗井。
A new fluid surface conditioning system for coating proppants has been developed which greatly increases the surface friction and restricts the surrounding particles. Because of the high friction between the coated proppant particles’ surfaces, they can withstand high velocities, minimizing back-flow after fracturing stimulation. According to the field test results, after the conventional fracturing treatment, when the surface conditioning material is used as a back flow control agent, it can be used in a more aggressive back flow procedure. This treatment did not affect the conductivity, and in fact increased the conductivity of the proppant when the closure stress was below 40 lbs / in2. The good distribution of the vertical proppant during the experiment demonstrated how the surface modification prevented the proppant Settled. All of the fine particles that have been present in the proppant (resulting from fracturing the fractured closed-point proppant) are adhered to the treated proppant, preventing them from migrating and clogging the pore throat of the proppant pack. This unique coating technology further enhances the conductivity by improving the activity of fracturing breakers in a fluid and enables efficient and efficient well washing after stimulation.