Uncertainty Implications In Azimuthal Velocity Analysis

摘要: Commercial methodologies of azimuthal velocity analysis fall into two categories: 1) azimuth sectoring and 2) no sectoring. A wide-azimuth seismic survey was processed independently by processing contractors – one using sectoring, the other comparison corresponding interval maps revealed little similarity between approaches. Several possible reasons were examined to account for differences. I conclude that approach data target zone considered here yields seemingly plausible, but meaningless results. The non-azimuth is statistically far more robust provides are consistent with observations. Azimuthal via should be avoided except very thick layers, then only after careful modeling impact rms uncertainty.