Abstract:In the conventional constant-phase correction processing, the phase of a residual wavelet is considered as a constant. In fact, this is only a kind of the one-order approximation. When the bandwidth of a wavelet amplitude spectrum is very narrow, this approximation works. But when the bandwidth is wide, the expected results cannot be obtained if the phase is corrected by the same constant for different frequency components. In this paper, we propose a new approach for this problem. We realize a non-constant phase correction for a residual wavelet using the pure phase correction. This method includes two steps, the estimation of a pure phase factor and the phase correction of residual wavelet. The pure phase factor is directly calculated by constructing a pure phase factor characteristic equation. Then the pure phase correction of residual wavelet on seismic data is carried out. Seismic data resolution is greatly improved by eliminating phase errors of residual wavelet. Synthetic and real data examples demonstrate the effectiveness and practicability of the proposed method.