水中高压脉冲放电的延时特性与电流特性研究

Research on the Delay Characteristics and Current Characteristics of High-voltage Pulse Discharge in Water

将水中高压脉冲放电技术应用于煤层气井的致裂增透,了解不同参数条件下水中高压脉冲放电的特性,寻找适合工程实际的放电参数。在不同的电容充电电压和水介质静水压力参数条件下,进行了水中高压脉冲放电的实验研究,采集并分析了实验中的电压和电流数据;对不同参数条件下的放电电压和放电电流波形进行了分析。实验结果表明,随着电容充电电压的增加,水介质的击穿延时缩短,放电产生的电流峰值和震荡次数增大;随着水介质静水压力的增大,击穿延时变长,放电产生的电流参数基本相同,但电流峰值会有所波动。本研究可为煤层气井的致裂增透提供理论指导。

In order to apply the technology of high voltage pulse discharge in water to the CBM wells fracturing anti-reflection,the experiment of high-voltage pulse discharge in water was carried out in different capacitance charging voltage and hydrostatic pressure.For understanding the discharge characteristics of high-voltage pulse discharge in water,and searching for suitable discharge parameters for engineering practice,the experimental data of voltage and current under different parameters were collected and analyzed.The results show that:with the increase of the charging voltage of the capacitor,the breakdown delay time of water medium is shortened,discharge current peak and oscillation frequency increases;And with the increase of the hydrostatic pressure of water medium,the breakdown delay becomes longer,the current parameters of discharge are basically the same,but the peak current fluctuates.