我国精密可控震源主动探测研究进展

精密可控震源对地发射扫频信号,通过高精度的观测系统获得记录资料,采用专门的数据处理方法来提取信号,获得地下介质的信息。介绍现有的一些数据处理方法,比如匹配滤波、反褶积、Wigner-Hough变换和时变滤波等,可以实现可控震源信号提取。并总结这些方法的优缺点。通过多次野外科学实验发现,精密可控震源技术是一种探测地下介质结构及变化的有效途径。针对精密可控震源探测的影响因素,还需要开展深入研究,以便于改善其探测距离和分辨能力。

Research Progress in Active Monitoring of the Controlled Accurately Seismic Source in China

A sweep signal, radiated by the Controlled Accurately Seismic Source (CASS), is recorded by a high?precision observation system. From what ’ s recorded signal is extracted through special data processing to get information about the subsurface medium. This paper first presents some data?processing methods like matched filter, deconvolution, Wigner?Hough transform and time?varying narrow?band filter etc. , which can be used to extract controlled seismic source signals, and then summarizes both the advantages and the disadvantages of these methods. Field experiments prove that CASS technology is efficient in detecting the structure and variation of the subsurface medium. To make improvements in the detection of distance and resolution capability, further study is to be done in specifying the factors that have an influence on CASS detection.