共炮记录正演模拟检波点下延记录原理

Geophone record forward modeling from common-shot record

1. 成都理工学院信息工程与地球物理系,成都610059;2. 四川石油管理局,成都510212;3. 中国科学院南海海洋研究所,广州510301;4. 四川师范大学物理系,成都610066

Department of Information Engineering and Geophysics, Chengdu Institute of Technology, Chengdu 610059

本文提出共炮记录正演模拟检波点下延记录原理, 用单程声波方程实现了非零偏移距地震记录的正演模拟。这种方法突破了全波方程非零偏移距波动方程正演模拟的限制, 克服了全波方程处理中多次波、虚逝波和地表边界条件的问题, 并且运算快、精度高。

This paper presents the principle of extrapolating geophone record from commonshot record. Based on the principle, the one-way wave equation is employed to implement theforward modeling of non-zero offset seismogram. This scheme breaks through the restriction offull wave equation method, and solves the problem of multiple. evanescent wave, and surfaceboundary condition met in full wave equation processing. Furthermore, the formulae we deducedare efficient and accurate.