【摘要】 体τ-p变换技术将常规二维τ-p变换去噪方法应用于三维叠后数据体,可显著提高信噪比。OVT(Offset Vector Tile)域道集可延展至全工区的单次覆盖特性,便于在叠前应用体τ-p变换技术。在OVT域将体τ-p变换技术应用于TG地区实际低信噪比数据,并与常规3D-RNA技术进行对比,结果表明:无论是在去噪未实施偏移前还是在去噪实施偏移后,体τ-p变换技术压制随机噪声、提高信噪比的效果均明显优于3D-RNA技术,因此它是一种提高低信噪比地区地震资料成像品质的有效手段。更多还原

【Abstract】 Volumeτ-ptransform can remove noise on 3D poststack data and improve greatly the signal to noise(S/N)ratio as conventional 2D τ-p transform does on 2D poststack data.Offset vector tile(OVT)gathers are featured with single-fold in the whole survey,so volumeτ-ptransform can be easily applied on the OVT domain.Both volumeτ-p transform and 3D-RNA are applied on low S/N ratio seismic data in TG area.The results show that the volumeτ-p transform achieves much better noise removal and S/N ratio improvement than 3D-RNA both on prestack migration and poststack migration data,which indicates that the volumeτ-ptransform is an effective approach for S/N ratio improvement.更多还原