高能电弧脉冲压裂技术初探

Preliminary Study on High-Energy Pulsed Arc Fracturing

为了掌握高能电弧脉冲压裂技术的基本原理,研究影响其压裂效果的关键参数,进行了高能电弧脉冲压裂理论分析和室内试验。理论分析可知,高能电弧脉冲压裂所产生的冲击波压力与放电电压、脉冲能量和放电时间有关。室内试验显示,电弧压力脉冲能在混凝土试样中的模拟井筒的井壁上造成裂缝,裂缝呈径向分布,在近井筒区域无明显弯曲。试验结果表明,在高能电弧脉冲压裂中,随着放电电压和单次能量的增高,产生的脉冲压力峰值会增大,造成的电弧脉冲裂缝的缝高和缝长也会增大。研究结果为进一步进行高能电弧脉冲压裂提供了试验数据。

In order to get a better understanding of the principle of high-energy pulsed arc fracturing , determine key factors affecting its fracturing results ,theoretical analysis and lab experiment were conduc-ted for high-energy pulsed arc fracturing .The theoretical analysis indicates that the pulse wave pressure produced in high-energy pulsed arc fracturing depends on the discharging voltage ,pulse energy and dischar-ging time .Lab experiment shows that obvious fractures around the wellbore in concrete samples can be cre-ated by using different discharging voltages ,the fractures are radial with no obvious bending in near well-bore area .The testing results show that the pulse pressure peak will increase with the increase of dischar-ging voltage and pulse energy ,and the fracture height and length will also increase .The research results provide testing data for further high-energy pulsed arc fracturing .