Seismic Attenuation (Q) Estimation From VSP Data And QP Versus VP/VS

摘要: Pand S-wave attenuations are studied using vertical and horizontal vibrator sources zero-offset VSP data from the Ross Lake heavy oilfield, Saskatchewan. We find that shows a larger amplitude loss phase change than P-wave over same depths. This suggests we will need to pay attention attenuation in matching of PP PS images. A new approach spectral ratio method has been developed calculate robust continuous interval Q factor data. also establish an estimate quality indicator (QQI) curve highlight where can obtain reasonable factor. Poor estimates may arise casing-bond problems, multiple casing areas, or source inconsistencies.