摘要
讨论能补偿吸收衰减的麦克斯韦方程叠前偏移方法。从麦克斯韦方程组出发,得到补偿吸收衰减的频率-波数域波场外推算子。为能处理介质有横向变化的叠前偏移问题,波场外推在空间频率域中进行。用能补偿吸收衰减的地质雷达资料的叠前偏移方法处理了合成和野外采集的实际地质雷达资料。对比了考虑和不考虑吸收衰减的野外实际地质雷达资料偏移叠加剖面的差异,补偿吸收衰减的偏移叠加剖面中反射同相轴具有更好的连续性。
A space-frequency domain prestack migration method to compensating absorption is presented. Wavefield extrapolation operators in wavenumber-frequency domain with absorption compensation based on Maxwell Equation for forward propagations with attenuation are obtained. For the purpose of processing the data from laterally variable velocity media, the operators are transformed back to space domain and migration is complemented by convolution. Some synthetic migration examples are given to investigate the ability to resist random noise on migration results. A field data example is depicted to illustrate the difference between the results of prestack migration with and without compensation of absorption. It shows that reflection events of the migration profile with compensation are more continuous than that without compensation.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2007年第1期158-163,共6页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(40104004
40574053)
教育部留学回国人员科研启动基金资助
关键词
地质雷达
叠前偏移
吸收补偿
ground-penetrating radar
prestack migration
absorption compensation
