The problem of vertical resolution is to determine the wavelet at the target. Mis-ties at wells of ±20 ms are normal in the best 3-D seismic data, and they present no simple pattern. The seismic wavelet in poststack 3-D data clearly varies both laterally and vertically. The lateral variations are caused by two effects: shot-to-shot and line-to-line variations in acquisition parameters (especially source-signature variations) and prestack, trace-dependent filtering processes (such as predictive deconvolution). The vertical variations are caused by attenuation in the earth. The approach described in this paper is to eliminate the lateral variations in acquisition using independent measurements...

First Page Preview

First page PDF preview
You do not currently have access to this article.