用共偏移距初至曲线联动共炮点道集拾取地震波初至

英文篇名：THE APPLICATION OF THE COMMON OFFSET FIRST ARRIVAL CURVE COMBINED WITH COMMON-SOUCE-LOCATION BASIS TO PICKING FIRST ARRIVALS OF SEISMIC WAVE
中文刊名：物探与化探
英文刊名：Geophysical and Geochemical Exploration
作者：皮金云 ; 王彦春 ; 张静
英文作者：PI Jin-yun ; WANG Yan-chun ; ZHANG Jing (Key Laboratory of Underground Information Detection Technique and Instrument of Ministry of Education ; China University of Geosciences ; Beijing 100083 ; China)
中文关键词：参考初至 ; 拾取时窗 ; 门槛值 ; 共炮点道集 ; 高程校正 ; 续至波
英文关键词：expected arrival time ; picking window ; threshold ; common-source-location basis ; elevation correction ; second arrival
出版日期：2007-04-30
机构：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,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,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,北京100083,北京100083
年：2007
期：02
出版单位：物探与化探

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-to-peak 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.

引文

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