基于射线参数一致性的转校换波静校正方法  

Converted-wave static correction method based on the consistence of ray-parameters

作　　者：朱童[1] 雷朝阳 孙振涛[1] ZHU Tong;LEI Chao-yang;SUN Zhen-tao(Sinopec Geophysical Research Institute,Nanjing 211103,China)

机构地区：[1]中国石油化工股份有限公司石油物探技术研究院,南京211103

出　　处：《地球物理学进展》2020年第5期1926-1932,共7页Progress in Geophysics

基　　金：“十三五”国家科技重大专项(2016ZX05014-001,2016ZX05053-001);中国石化科技部科研项目(P16028)联合资助.

摘　　要：转换波静校正问题往往面临近地表低速带影响,且其与纵波静校正相关性差,处理起来不稳定,因此较纵波静校正问题更难处理.常规基于地表一致性假设的纵波剩余静校正理论也难以直接应用到转换波静校正问题.本文根据射线传播理论,以射线参数一致性为理论支撑,把传统的时间空间域的静校正转换到射线参数域进行处理,给出了射线参数域的互相关和褶积运算公式来计算和应用静校正量,解决传统时间空间域的深浅层静校正不一致的问题,并通过理论模型以及实际资料验证了该方法的有效性.The problem of converted-wave static correction is often affected by near surface low-velocity zone,and its correlation with p-wave static correction is poor,which makes it more difficult to deal with than traditional p-wave static correciton.Conventional P-wave residual static correction theory based on surface consistency hypothesis is also difficult to directly apply to converted-wave static correction.According to the ray propagation theory and based on the consistency of ray parameters,the traditional static correction in the time-space domain is converted to the ray parameter domain for processing,and the cross-correlation and convolution operation formulas in the ray parameter domain are given to calculate and apply the static correction amount,thus solving the problem of inconsistent static correction in the deep and shallow layers in the traditional time-space domain.The effectiveness of the method is verified by theoretical models and field data.

关 键 词：射线参数 一致性 转换波 静校正 

分 类 号：P631[天文地球—地质矿产勘探]