Error Analysis of Shear-Velocity Prediction by the Xu-White Model
详细信息
- 责任者：Bai Junyu (SINOPEC Geophysical Research Institute ; Nanjing 210014 ; China) ; Song Zhixiang
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(2)
- 关键词：横波 ; S-waves ; 波群速度 ; group velocity
- 页码：p.589-595
- 图表：9 illus., 1 table, 28 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
The authors developed a method to predict shear-wave velocity in shale sandstone from conventional log data and experimental data,using the Gassmann’s equations and the Xu-White model.It not only considers the effects of rock matrix and fluid inclusions,but also the porosity and pore shapes.The influence of errors of input parameters on the precision of prediction of S-wave velocities is analyzed.Numerical experiments show that the variable aspect ratio method provides an important improvement in the application of the Xu-White model for sand-clay mixtures as compared to the fixed aspect ratio assumption.This method has shown a significant improvement in predicting the velocities over the conventional Xu-White model.
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