用共偏移距初至曲线联动共炮点道集拾取地震波初至  

THE APPLICATION OF THE COMMON OFFSET FIRST ARRIVAL CURVE COMBINED WITH COMMON-SOUCE-LOCATION BASIS TO PICKING FIRST ARRIVALS OF SEISMIC WAVE

作　　者：皮金云[1] 王彦春[1] 张静[1] 

机构地区：[1]中国地质大学地下信息探测技术与仪器教育部重点实验室,北京100083

出　　处：《物探与化探》2007年第2期164-166,170,共4页Geophysical and Geochemical Exploration

摘　　要：在共偏移距初至曲线上,针对初至偏大和初至偏小的点,分别设置不同的计算参数,联动共炮点道集进行初至批量修改。在初至自动拾取算法上,利用波谷波峰比,结合参考初至、拾取时窗以及门槛值等参数,较好地解决了低信噪比地区初至拾取精度和效率问题。This paper deals with the first arrival batch modification methods which use the common-offset first arrival curve combined with the common-source-location basis by setting different parameters aiming at overestimation and underestimation of first arrivals. It also presents a new approach to the automatic picking of the later phase of the first arrival rather than the first break using a trough-topeak ratio technique combined with expected arrival time, picking window and threshold. The application of these new methods remarkably improves the precision and efficiency of the first arrivals picking in areas of poor signal-to-noise ratios.

关 键 词：参考初至 拾取时窗 门槛值 共炮点道集 高程校正 续至波 

分 类 号：P631.4[天文地球—地质矿产勘探]