Gasperikova, Erika (Lawrence Berkeley National Laboratory) | Smith, J.T. (Lawrence Berkeley National Laboratory) | Morrison, H.F. (Lawrence Berkeley National Laboratory) | Becker, A. (Lawrence Berkeley National Laboratory) | Kappler, K. (Lawrence Berkeley National Laboratory)
It is difficult to characterize accurately subtle stratigraphic details by surface seismic data with poor vertical resolution. A new method for restoring high frequencies within the seismic bandwidth by utilizing velocity logging data has been proposed in the paper. By assuming seismic wave propagation in formations is attenuated linearly, a theoretical model is derived firstly between surface seismic data and velocity logging data, and then the absorption system response is evaluated based on system identification technology, which can be used to compensate the attenuated high frequencies within the surface seismic bandwidth. The results of high frequency restoration for the forward modeling data and the actual surface seismic data show that the new method can enhance significantly the vertical resolution of the surface seismic data, which will advance the dominant frequency between 10Hz and 20Hz, widen the frequency band about 10Hz, but the principal features of the original surface seismic data still hold.