速度谱精细解释在东营凹陷官11地区的应用

借鉴叠前深度偏移处理中速度建模的思想,在速度谱精细解释中注重以下三个方面的工作在全面了解区域地质特征的基础上,认真分析速度谱与地层以及地震反射层之间对应关系;以解释的标准层位控制速度谱解释时的主要速度变化点;根据速度谱浅层、中深层能量团分布特点完成精细解释。这样的速度谱解释结果优于其他方法,已在东营凹陷官11地区无井反演中得到验证。

Application of fine interpretations of velocity spectrum in Guan 11 block in Dongying sag

Drawing on the idea of velocity model building in pre - stack depth migration processing, the followings have been carried out during fine interpretation of velocity spectrum. The relationships between velocity spectrum and strata and seismic reflectance horizons have been thoroughly analyzed on the basis of comprehensive understanding of regional geologic features. The interpreted horizon markers have controlled the main points of velocity change during velocity spectrum interpretation. Fine interpretation of velocity spectrum has been accomplished according to energy distributions of the shallow horizons and mid - deep horizons in velocity spectrum. The results of velocity spectrum interpretation with this method are better than that of the other methods. It has been verified by inversion without well control in Guan 11 block in Dongying sag.