| 摘要 |
A method for removing the contribution due to ground roll from a seismic data set comprises an M channel adaptive filter, which is configured via weights wi obtained using an adaptive algorithm based on seeking the minimum in a cost function J. The cost function includes an expansion of the measured signal d into d = dg +Δd (where: dg is ground roll contribution andΔd = dsig + dran, where dsig is the reflected signal component and dm, is a random noise component) and a corresponding expansion of the reference signal x into x = xg + Ox. The delta components are included as a normalization factor of cost function J to provide an optimal solution of the filter coefficients biased by the reflection signal. The data set is filtered using the configured filter and the ground roll contribution is attenuated, resulting in an improved data set. |
