不同转换域瑞雷面波频散曲线提取精度对比研究  

Comparative Study on Extraction Accuracy of Rayleigh Wave Dispersion Curves in Different Conversion Domains

作　　者：孙海福 朱占升 赵东 Haifu Sun;Zhansheng Zhu;Dong Zhao(Hengda Century (Beijing) Geophysics Technology Co., Ltd., Beijing, 100020, China;Beijing Huan’an Engineering Inspection & Test Co., Ltd, Beijing, 100082, China;Geogiga Technology Corp, Calgary, Canada)

机构地区：[1]恒达新创(北京)地球物理技术有限公司,中国北京100020 [2]北京环安工程检测有限责任公司,中国北京100082 [3]加拿大骄佳技术公司,加拿大卡尔加里

出　　处：《工程技术与管理（新加坡）》2019年第5期7-10,共4页Engineering Technology & Management

摘　　要：主动源面波勘探频散曲线的提取目前主要在F-K、F-P和F-V域内拾取,文章从F-K、F-P和F-V域变换计算公式推导出发,通过对正演的单炮24道地震记录在F-K、F-P和F-V域变换所得的频散谱及手动拾取从高频到低频的频散曲线的对比分析,得出在F-V域拾取频散曲线的精度相对较高的结论,然后使用真实的主动源面波数据在F-K、F-P、F-V域做频散谱计算及手动拾取频散曲线,验证了在F-V域拾取频散曲线的精度相对较高的结论。因为在频率-波数域和频率-慢度域低频段的波数和慢度的微小变化都会造成速度的剧烈变动,造成拾取频散曲线精度不高的问题。The present dispersive curve extraction is mainly done in F-K, F-P, F-V domains in the active surface wave prospecting. The basic computing principles of F-K, F-P and F-V domains firstly are discussed. Then the forward modeling computation using on shot gathering with 24channels and the dispersive curves from low frequency to high frequency in F-K, F-P and F-V domains is done too. The conclusion is provided that the dispersive curve picking accuracy is higher in the F-V domain compared with F-K and F-P domains. The conclusion is again verified by the real field active surface wave data by picking the dispersive curves in F-K, F-P and F-V domains. That is because that the tinny changed of K and P will cause the changes of V very much.

关 键 词：瑞雷面波 频率-波数域 频率-慢度域 频率-速度域 

分 类 号：P631.4[天文地球—地质矿产勘探]