用于同步激发P波和S波井间地震采集的环形振动器震源

Ring vibrator source used for P-wave and S-wave cross-hole seismic acquisition.

井中地震震源———环形振动器已成功地用于裂缝型玄武岩含水层的井间地震勘探。这种地震震源采用离心质量旋转地震能量 ,在每个震源点记录下顺时针转动和逆时针转动所产生的扫描信号。由于该震源产生的是环形极化波 ,可以通过唯一的处理算法 ,将记录分解成两个等同而相互垂直的线性振荡地震源波。这样环形振动器就同时产生全方位角的P波和S波。采用P波粒子振动的坐标旋转 ,可使不同深度的震源分量对齐。在野外实践中 ,使用流体耦合的水听器 (也叫海底丰———译者注 )检波器来记录P波和S波。处理后的野外资料显示 ,从主测线和联络测线分量中分别分离出清晰的P波和S波。分解处理的张量卷积方法还用于多分量处理。

Recently-developed well seismic source—ring vibrator is successfully used for cross-hole seismic exploration for fractured basalt aquifer. The seismic source uses the rotation of centrifugal quality to produce seismic energy. The produced sweep signals are recorded by clockwise and counter clockwise rotation at each source point. The records are decomposed into two seismic waves with same linear vibration but vertical each other by unique processing algorithm as the source producing polarized wave. So, the ring vibrator produced synchronistically full-azimuth P-wave and S-wave. Using coordinate rotation based on P-wave particle vibration, aligning the source components at different depths have been achieved.Using hydrophone coupled with fluid to receive P-wave and S-wave in field operation. The processed field data showed that the distinguished P-wave and S-wave have been separated from in-line and cross-line components. The decomposed strain deconvolution method can be also used for multi-component processing.