【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。更多还原

【Abstract】 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.更多还原