摘要
为揭示所研制的可降解性聚合物压裂球的性能特征，分别采用自来水、压裂液与返排液作为聚合物压裂球的降解液，研究了降解时间与温度对压裂球降解行为的影响，并用红外光谱与X-射线衍射方法分析了压裂球的降解机理。结果表明：在100℃自来水中，随降解时间延长，压裂球的质量与直径减小。在返排液中，随降解时间延长，压裂球质量逐渐减小；随环境温度的升高，压裂球降解速率增大。在压裂液中，压裂球的质量与直径不随浸泡时间的延长而变化。从聚合物聚集态和分子层面分析了聚合物压裂球的降解机理。聚合物压裂球抗压差性能稳定，压裂施工过程中按照常规投球方式进行，压裂后压裂球自行降解，无需回收处理，使用范围比可降解合金球广。图6参12
Abstract
To reveal the performance characteristics of homemade degradable fracturing polymer ball, the degradation behavior of fracturing ball at various degradable time and temperature was investigated by using water, fracturing fluid and flow-back fluid acting as a degradable media of fracturing ball. Furthermore, the degradation mechanism of fracturing ball was discussed via infrared spectroscopy and XRD technology. The results showed that the mass and diameter of fracturing ball, immersing in water at 100℃, decreased gradually when degradable time increased. The mass of fracturing ball, immersing in flow-back fluid, decreased gradually when degradable time increased, and the degradation rate of fracturing ball increased when environment temperature increased. When they were immersed in fracturing fluid, the mass and diameter of fracturing ball kept instant with increasing degradable time. The degradation mechanism of fracturing ball was analyzed from molecular structure and aggregation of polymers. Fracturing polymer ball with stable compressive property was carried out in a conventional pitching manner in fracturing process. After fracturing, polymer ball was self-degraded without recycling. Degradable polymer ball had a wider application compared with degradable alloy ball.
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