CAJ | 학술논문

在多分量地震勘探资料中,水平和垂直分量都记录有P波和SV波.本文研究了P波和SV波波场分解的方法.当上行P波和S波分别入射时,通过研究它们引起的水平和垂直位移,把地震记录的水平和垂直分量进行分解,得到纵波和转换波;在已知海底介质中纵横波速度和介质密度的情况下,可以在τ-p域内实现波场分解,然后变换到时间域,得到时间域内的纵波和转换波剖面.把本文研究的波场分解方法应用于合成资料,能够有效地分解得到纵波波场和转换波波场.最后,海上多分量实际资料的实例应用表明,本文研究的波场分解方法是可行有效的.本方法也适用于自由表面的资料.
재다분량지진감탐자료중,수평화수직분량도기록유P파화SV파.본문연구료P파화SV파파장분해적방법.당상행P파화S파분별입사시,통과연구타문인기적수평화수직위이,파지진기록적수평화수직분량진행분해,득도종파화전환파;재이지해저개질중종횡파속도화개질밀도적정황하,가이재τ-p역내실현파장분해,연후변환도시간역,득도시간역내적종파화전환파부면.파본문연구적파장분해방법응용우합성자료,능구유효지분해득도종파파장화전환파파장.최후,해상다분량실제자료적실례응용표명,본문연구적파장분해방법시가행유효적.본방법야괄용우자유표면적자료.
In multi-component seismic exploration, the horizontal and vertical components both contain P- and SV-waves. The P- and SV-wavefields in a seismic record can be separated by their horizontal and vertical displacements when upgoing P- and SV-waves arrive at the sea floor. If the sea floor P wave velocity, S wave velocity, and density are known, the separation can be achieved in theτ-p domain. The separated wavefields are then transformed to the time domain. A method of separating P- and SV-wavefields is presented in this paper and used to effectively separate P- and SV-wavefields in synthetic and real data. The application to real data shows that this method is feasible and effective. It also can be used for free surface data.