高阶矩有效微地震事件拾取处理方法

常规的长/短时窗能量比方法对于低信噪比记录的有效事件漏拾率较高。在高阶矩理论分析的基础上,把原来利用长/短时窗比拾取有效事件的方法改进为高阶矩时窗比方法；针对微地震记录的变化特点,对计算结果进行取对数处理,并把固定窗口改进为自适应变化窗口,利用相关分析结果进行事件的拾取；最后通过实际资料处理效果分析,验证了高阶矩有效微地震事件拾取方法的效果。

The conventional method of energy ratio with different windows has high leakage pickup rates to effective events for low S/N seismic record.Based on the higher order moment theory,we altered long & short time window energy ratio method into high order moment time window energy ratio method.Aiming at the variation characteristics of micro-seismic record,we take the logarithm of computation result and use the adaptive window to replace the fixed window for the complex characteristics of micro-seismic signal in the time record.Then,the effective events are picked up by using correlation analysis results.Finally,the application result indicates the effectiveness of the method.