摘要
在许多实际地球物理资料中往往缺失横波速度信息,这给叠前地震属性分析和叠前地震反演均带来不利影响。如今针对碎屑岩地区的横波速度预测方法已日趋成熟,而针对碳酸盐岩地区的研究相对较少。本文基于经典Xu-White模型,从岩石物理角度构建出一种适用于碳酸盐岩的修正Xu-White模型;然后类比于Pick-ett、Castagna等建立的碳酸盐岩纵横波速度经验公式,建立了更适用于碳酸盐岩地区的经验公式;将该经验公式和修正Xu-White模型应用于实际碳酸盐岩地区的横波速度预测,对预测结果进行的对比分析证实,修正Xu-White模型具有更高的横波速度预测精度。
In a number of actual geophysical data,the shortage of shear velocity will bring some difficulties for prestack seismic attributes analysis and prestack seismic inversion.However,shear velocity estimation methods of clastic rocks have been developed more mature than shear velocity estimation methods of carbonate rocks.In this work,based on classic Xu-White model,the improved Xu-White model for carbonate rocks is constructed from rock physics theory.Then through an analogy study of empirical equations for carbonate rocks built by Pickett,Castagna and so on,the empirical relations for the practical carbonate zones.Finally the empirical equations and the improved Xu-White model are used to calculate shear velocity for the practical carbonate zone.The estimated results illustrate that higher predicted accuracy of shear velocity can be obtained by the improved Xu-White model.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2012年第5期717-722,844+676-677,共6页
Oil Geophysical Prospecting
基金
国家油气重大专项(2011ZX05014-001-010HZ)
中国石油科技创新基金(2011D-5006-0301)
中央高校基本科研业务费专项资金(11CX05006A)联合资助
