TT-transform and its application in surface wave suppression

摘要

In seismic exploration, surface wave often needs to be suppressed as interference wave so the effective wave can be highlighted. This paper presents TT-transform based on S-transform to suppress surface wave. Because the surface wave has lower frequency than other effective wave and TT transform has good frequency conversion ability, it gathers the high frequency signal in diagonal position of TT spectrum. Namely, the range of high frequency signal is more narrow than low frequency signal's near the diagonal of TT spectrum. So we can suppress the surface wave through extracting the diagonal elements of TT spectrum. The result of numerical simulation and real seismic data processing reflects the nature of the TT transform and it's effectiveness of suppressing surface wave.