高阶矩有效微地震事件拾取处理方法  

A processing method of picking micro-seismic effective events with high order moment

作　　者：宋维琪[1] 喻智超 杨勤勇[2] 姜宇东[2] 郭全仕[2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石油化工股份有限公司石油物探技术研究院,江苏南京211103

出　　处：《石油物探》2013年第4期388-393,332-333,共6页Geophysical Prospecting For Petroleum

摘　　要：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.

关 键 词：高阶矩 微地震事件 能量比 取对数 

分 类 号：P631.4[天文地球—地质矿产勘探]